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Hi, Matt</div>
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<br>
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Wow, you're right! It is the OBCS issue, more precisely a sponge layer setting <span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">
issue.</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><br>
</span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">My sponge layer setting before:</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span style="font-size: 10pt;"># Sponge layer parameters</span><span><br>
</span>
<div><span style="font-size: 10pt;"> &OBCS_PARM03</span><br>
</div>
<div><span style="font-size: 10pt;"> spongeThickness = 10,</span><br>
</div>
<div><span style="font-size: 10pt;"> Urelaxobcsinner = 432000.0,</span><br>
</div>
<div><span style="font-size: 10pt;"> </span><span style="font-size: 10pt; color: rgb(200, 38, 19);">Urelaxobcsbound = 86400.0,</span><br>
</div>
<div><span style="font-size: 10pt;"> Vrelaxobcsinner = 432000.0,</span><br>
</div>
<div><span style="font-size: 10pt; color: rgb(200, 38, 19);"> Vrelaxobcsbound = 86400.0,</span><br>
</div>
<span style="font-size: 10pt;"> &</span><br>
</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span><br>
</span></span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span>Now:</span></span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span>
<div style="margin: 0px; font-size: 12pt; font-family: Calibri, Arial, Helvetica, sans-serif">
<span style="margin: 0px; background-color: rgb(255, 255, 255); display: inline !important"><span style="margin: 0px; font-size: 10pt;"># Sponge layer parameters</span><span style="margin: 0px"><br>
</span>
<div style="margin: 0px"><span style="font-size: 10pt;"> &OBCS_PARM03</span><br>
</div>
<div style="margin: 0px"><span style="font-size: 10pt;"> spongeThickness = 10,</span><br>
</div>
<div style="margin: 0px"><span style="font-size: 10pt;"> Urelaxobcsinner = 432000.0,</span><br>
</div>
<div style="margin: 0px"><span style="font-size: 10pt; color: rgb(200, 38, 19);"> Urelaxobcsbound = 3600.0,</span><br>
</div>
<div style="margin: 0px"><span style="font-size: 10pt;"> Vrelaxobcsinner = 432000.0,</span><br>
</div>
<div style="margin: 0px"><span style="font-size: 10pt;"> </span><span style="font-size: 10pt; color: rgb(200, 38, 19);">Vrelaxobcsbound =
</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important; font-size: 10pt; color: rgb(200, 38, 19);">3600.0</span><span style="font-size: 10pt; color: rgb(200, 38, 19);">,</span><br>
</div>
<span style="margin: 0px; font-size: 10pt;"> &</span><br>
</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span><br>
</span></span></div>
The model works OK now whether it is daily or hourly surface forcing data. </span></span><span style="font-family: Calibri, Helvetica, sans-serif;">So the experience is that:</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: Calibri, Helvetica, sans-serif;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">Urelaxobcsbound & <span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">Vrelaxobcsbound
≤ </span></span></span><span style="font-family: Calibri, Helvetica, sans-serif;">period of surface <span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">forcing data</span></span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span><span style="margin: 0px; font-family: Calibri, Helvetica, sans-serif; background-color: rgb(255, 255, 255)"><span style="margin: 0px; font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">Urelaxobcsinner</span>
& <span style="margin: 0px; background-color: rgb(255, 255, 255); display: inline !important"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">Vrelaxobcsinner</span> ≤<span> </span></span></span></span><span style="margin: 0px; font-family: Calibri, Helvetica, sans-serif; background-color: rgb(255, 255, 255)">period
of OBCS</span><br>
</span></span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span>If I have something wrong, welcome everyone to point out.<br>
</span></span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span><br>
</span></span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span><br>
</span></span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span>Best,</span></span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span>-Mike</span></span></div>
<div id="appendonsend"></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>发件人:</b> MITgcm-support <mitgcm-support-bounces@mitgcm.org> 代表 Matthew Mazloff <mmazloff@ucsd.edu><br>
<b>发送时间:</b> 2020年3月19日 0:49<br>
<b>收件人:</b> mitgcm-support@mitgcm.org <mitgcm-support@mitgcm.org><br>
<b>主题:</b> Re: [MITgcm-support] 回复: 回复: 回复: 转发: The obvious difference between ERA5 and NCEP-R1 forcing</font>
<div> </div>
</div>
<div class="" style="word-wrap:break-word; line-break:after-white-space">Hi Mike
<div class=""><br class="">
</div>
<div class="">Are you getting spurious features at the open boundaries?</div>
<div class="">Are you using a restoring/sponge layer?</div>
<div class="">Do you have the bathymetry in the normal direction flat at the boundaries?</div>
<div class="">Where is the issue showing up - the corners?</div>
<div class=""><br class="">
</div>
<div class="">This sounds more like an OBCS issue than a surface forcing issue, and your extra energy from hourly wind is just making your OBCS problem worse. </div>
<div class=""><br class="">
</div>
<div class="">Matt</div>
<div class=""><br class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">On Mar 18, 2020, at 5:00 AM, Leming Van <<a href="mailto:ifanliming@outlook.com" class="">ifanliming@outlook.com</a>> wrote:</div>
<br class="x_Apple-interchange-newline">
<div class="">
<div class="" style="font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
Hi, everyone</div>
<div class="" style="font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<br class="">
</div>
<div class="" style="font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="">I have found the cause of the difference. </span></div>
<div class="" style="font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><br class="">
</span>
<div class="">The<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline!important"> MITgcm</span> open boundaries are forced by monthly HYCOM data, while the forcing period of surface wind field is
one hour, so the problem turns up.<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""><br class="">
</div>
<div class="">Now I uesd daily surface wind field, it works OK for me. Daily OB<span class="x_Apple-converted-space"> </span><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline!important">forcing</span><span class="x_Apple-converted-space"> </span>field
and hourly surface wind field may be suitable too.<br class="">
</div>
<div class=""><br class="">
</div>
<span class="">Thanks for your attention and help.</span><br class="">
</div>
<div class="" style="font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><br class="">
</span></div>
<div class="" style="font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><br class="">
</span></div>
<div class="" style="font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="">Cheers,</span></div>
<div class="" style="font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="">-Mike</span></div>
<div id="x_appendonsend" class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
</div>
<hr tabindex="-1" class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; display:inline-block; width:966.265625px">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important"></span>
<div id="x_divRplyFwdMsg" dir="ltr" class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<font face="Calibri, sans-serif" class="" style="font-size:11pt"><b class="">发件人:</b><span class="x_Apple-converted-space"> </span>MITgcm-support <<a href="mailto:mitgcm-support-bounces@mitgcm.org" class="">mitgcm-support-bounces@mitgcm.org</a>> 代表 Stanislav
Martyanov <<a href="mailto:martyanov.sd@gmail.com" class="">martyanov.sd@gmail.com</a>><br class="">
<b class="">发送时间:</b><span class="x_Apple-converted-space"> </span>2020年3月17日 15:59<br class="">
<b class="">收件人:</b><span class="x_Apple-converted-space"> </span><a href="mailto:mitgcm-support@mitgcm.org" class="">mitgcm-support@mitgcm.org</a><span class="x_Apple-converted-space"> </span><<a href="mailto:mitgcm-support@mitgcm.org" class="">mitgcm-support@mitgcm.org</a>><br class="">
<b class="">主题:</b><span class="x_Apple-converted-space"> </span>Re: [MITgcm-support] 回复: 回复: 转发: The obvious difference between ERA5 and NCEP-R1 forcing</font>
<div class=""> </div>
</div>
<div class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<div dir="ltr" class="">Hello, Mike!
<div class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">>>But I am a bit puzzled. The GLOBAL_REANALYSIS_PHY_001_030 you</span></div>
<div class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">>>mentioned should be a product of the NEMO model.</span></div>
<div class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">>>Is this the open boundary forcing data you use?</span><br class="">
</div>
<div class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><br class="">
</span></div>
<div class=""><font face="Calibri, Arial, Helvetica, sans-serif" class=""><span class="" style="font-size:16px">Oh, yes, it was a misprint - I looked in the another file... Of course, the ERA5 meteorological forcing was taken from </span></font><a href="https://cds.climate.copernicus.eu/" class="">https://cds.climate.copernicus.eu/</a>,
while the open boundary conditions for the ocean model - from the GLOBAL_REANALYSIS_PHY_001_030.</div>
<div class=""><br class="">
</div>
<div class="">By the way, concerning ERA5 units, some care should be taken. I'm sure you know all of this, as you have already posted, but for the users new to ERA5 reanalysis dataset some details might be useful:</div>
<div class=""><br class="">
</div>
<div class="">The ERA5's field 'Mean total precipitation rate' is in [kg m-2 s-1], and dividing it by 1000 kg m-3 makes the field suitable for the MITgcm's EXF package, while ERA5's 'Total precipitation' is in [m]. Also, 'Mean surface downward long-wave and
short-wave radiation fluxes' are in [W m-2], while 'Surface solar and thermal radiation downwards' is in [J m-2]. The difference is the multiplier related to the time period between adjacent model records. So, information presented in the Overview table at
the ERA5 page should be carefully read. It is not only about units, but also about the ERA5's convention for vertical fluxes' direction.</div>
<div class=""><br class="">
</div>
<div class="">I hope you will figure out the couse of difference in your results. Please, let us know when you succeed, the topic is interesting and important indeed.</div>
<div class=""><br class="">
</div>
<div class="">Regards,</div>
<div class="">Stanislav</div>
<div class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><br class="">
</span></div>
</div>
<br class="">
<div class="x_x_gmail_quote">
<div dir="ltr" class="x_x_gmail_attr">вт, 17 мар. 2020 г. в 08:58, Leming Van <<a href="mailto:ifanliming@outlook.com" class="">ifanliming@outlook.com</a>>:<br class="">
</div>
<blockquote class="x_x_gmail_quote" style="margin:0px 0px 0px 0.8ex; border-left-width:1px; border-left-style:solid; border-left-color:rgb(204,204,204); padding-left:1ex">
<div dir="ltr" class="">
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
Hi, </div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<br class="">
</div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
I am grateful to everyone for your reply, and here I will respond to your suggestions.<br class="">
</div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<br class="">
</div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">1.for Dr. Stanislav Martyanov =========================================</span><br class="">
</div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class="">Thank you for sharing the meteorological forcing variables used in the ERA5 dataset, which has benefited me a lot. </span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><br class="">
</span><span class="">But I am a bit puzzled. The GLOBAL_REANALYSIS_PHY_001_030 you mentioned should be a product of the NEMO model. Is this the open boundary forcing data you use?</span><br class="">
</span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">2.for<span class=""> </span></span><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">Estanislao ===================================================</span><br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class="">Thank you for your reminding.
Before using the data, it is very important to know the unit of the variable, just like the unit of precipitation in ERA5 is kg ・ m-2 s-1, and the unit of the corresponding<span class="x_Apple-converted-space"> </span><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">variable</span><span class="x_Apple-converted-space"> </span>in
MITgcm-EXF is m ・ s-1. </span></span></span></span>In this case, you need to divide by the density of fresh water for conversion. </div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><br class="">
</span><span class="">About the unit of long and short wave radiation flux in ERA5, I'm sure that it is W ・ m-2, and there should be no problem in the unit of other variables.</span><br class="">
</span></span></span></div>
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<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><br class="">
</span></span></span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><br class="">
</span></span></span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">3.for<span class="" style="margin:0px"> Raf</span></span><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"> =======================================================</span><br class="">
</span></span></span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"></span></span></span></span></span></div>
<span class="" style="font-family:Calibri,Helvetica,sans-serif">
<div class=""><span class="" style="font-family:Calibri,Helvetica,sans-serif"><br class="">
</span></div>
Thank you for your experience. The package I use is EXF. I simply looked at the code of EXF and found that it is calling exf_bulkformulae.F for related calculations.</span><span class="" style="font-family:Calibri,Helvetica,sans-serif"> </span>
<div class=""><font face="Calibri, Helvetica, sans-serif" class=""><br class="">
</font>
<div class=""><span class="" style="font-family:Calibri,Helvetica,sans-serif"><span class="" style="margin:0px; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">C us - mean wind speed (m/s) at height hu (m)</span><span class="" style="margin:0px; background-color:rgb(255,255,255)"><br class="">
</span>
<div class="" style="margin:0px; background-color:rgb(255,255,255)"><span class="" style="font-family:Calibri,Helvetica,sans-serif">C th - mean air temperature (K) at height ht (m)</span><br class="">
</div>
<span class="" style="margin:0px; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255)">C qh - mean air humidity (kg/kg) at height hq (m)</span><br class="">
</span></div>
<div class=""><span class="" style="font-family:Calibri,Helvetica,sans-serif"><br class="">
</span></div>
<div class=""><span class="" style="font-family:Calibri,Helvetica,sans-serif">As for the definition of various variables in height, exf_readparms. F has made relevant definitions, and I have checked that it is correct.</span></div>
<div class="">
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></span></span></span></div>
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<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"></span></span></span></span></span></div>
<span class=""> zref = 10.000 _d 0<br class="">
</span>
<div class=""> hu = 10.000 _d 0<br class="">
</div>
<span class=""> ht = 2.000 _d 0</span>
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<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></span></span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></span></span></span></div>
</div>
</div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">4.for<span class="" style="margin:0px"> Hong</span></span><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"> =======================================================</span><br class="">
</span></span></span></span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></span></span></span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">Thank
you for your checking. I'm sorry I didn't make it clear. I put net short-wave radiation flux (nswrs) in swfluxfile, since swdown will be ignored when using swdown and swflux at the same time, so </span></span></span></span></span></span><span class="" style="font-size:12pt">I
removed swdownfile.</span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-size:12pt"><br class="">
</span></div>
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<span class="" style="font-size:12pt"></span></div>
<span class="" style="font-family:Calibri,Helvetica,sans-serif">(PID.TID 0000.0001) ** WARNING ** EXF_CHECK: "swdown" field is loaded from file but not used within pkg/exf</span>
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</font></div>
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</font></div>
<div class=""><font face="Calibri, Helvetica, sans-serif" class="">Next ============================================================</font></div>
<div class=""><font face="Calibri, Helvetica, sans-serif" class=""></font><span class="" style="font-family:Calibri,Helvetica,sans-serif">It seems that you don't have the same problem as me. Next, I plan to use ERA5 and NCEP data at the same time to find the
reason for the difference between the results of model by the method of exclusion.</span>
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<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></span></span></span></span></div>
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<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></span></span></span></span></div>
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<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></span></span></span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">Best,</span></span></span></span></span></span></div>
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<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class="" style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">-Mike</span></span></span></span></span></span></div>
<div id="x_x_gmail-m_9130568462497490429appendonsend" class=""></div>
<hr class="" style="display:inline-block; width:954.234375px">
<div id="x_x_gmail-m_9130568462497490429divRplyFwdMsg" dir="ltr" class=""><font face="Calibri, sans-serif" class="" style="font-size:11pt"><b class="">发件人:</b><span class="x_Apple-converted-space"> </span>MITgcm-support <<a href="mailto:mitgcm-support-bounces@mitgcm.org" target="_blank" class="">mitgcm-support-bounces@mitgcm.org</a>>
代表 Raphael Dussin <<a href="mailto:raphael.dussin@gmail.com" target="_blank" class="">raphael.dussin@gmail.com</a>><br class="">
<b class="">发送时间:</b><span class="x_Apple-converted-space"> </span>2020年3月16日 20:24<br class="">
<b class="">收件人:</b><span class="x_Apple-converted-space"> </span><a href="mailto:mitgcm-support@mitgcm.org" target="_blank" class="">mitgcm-support@mitgcm.org</a><span class="x_Apple-converted-space"> </span><<a href="mailto:mitgcm-support@mitgcm.org" target="_blank" class="">mitgcm-support@mitgcm.org</a>><br class="">
<b class="">主题:</b><span class="x_Apple-converted-space"> </span>Re: [MITgcm-support] 回复: 转发: The obvious difference between ERA5 and NCEP-R1 forcing</font>
<div class=""> </div>
</div>
<div class="">
<div dir="ltr" class="">
<div class="">Have you checked the heights for the atmospheric variables are correctly set?</div>
<div class="">you should have something like this in data.blk</div>
<div class=""><br class="">
</div>
<div class="">zref = 10.0</div>
<div class="">zwd = 10.0</div>
<div class="">zth = 2.0 </div>
<div class=""><br class="">
</div>
<div class="">I've seen a lot of runs going off the rails because of this kind of problem:</div>
<div class="">If the height is not set right, the fluxes are not either and you end up with large biases.</div>
<div class=""><br class="">
</div>
<div class="">hope it helps,</div>
<div class="">Raf</div>
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</div>
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<div class="">Raf</div>
</div>
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<div dir="ltr" class="">Le lun. 16 mars 2020 à 04:49, Stanislav Martyanov <<a href="mailto:martyanov.sd@gmail.com" target="_blank" class="">martyanov.sd@gmail.com</a>> a écrit :<br class="">
</div>
<blockquote class="" style="margin:0px 0px 0px 0.8ex; border-left-width:1px; border-left-style:solid; border-left-color:rgb(204,204,204); padding-left:1ex">
<div dir="ltr" class="">Hello, Mike!
<div class=""><br class="">
</div>
<div class="">I have recently downloaded the ERA5 reanalysis data (daily fields, <span class="x_Apple-converted-space"> </span><span class="" style="color:rgb(63,63,65); font-size:11px; background-color:rgb(245,245,245)">GLOBAL_REANALYSIS_PHY_001_030</span> as
labeled in Copernicus network) in order to construct the meteorological forcing for a regional ocean model (Kara Sea) based on the MITgcm. I chose the following fields:</div>
<div class=""><br class="">
</div>
<div class="">% 10m u-component of wind <br class="">
% 10m v-component of wind <br class="">
% 2m dewpoint temperature <br class="">
% 2m temperature <br class="">
% Mean total precipitation rate<br class="">
% Mean sea level pressure<br class="">
% Mean surface downward long-wave radiation flux<br class="">
% Mean surface downward short-wave radiation flux <br class="">
</div>
<div class=""><br class="">
</div>
<div class="">In order to compute the specific humidity, as advised in the ERA5 documentation, I used formulas given in IFS Documentation CY46R1 - part-iv-physical-processes (2m dewpoint temperature and Mean sea level pressure are used there).</div>
<div class=""><br class="">
</div>
<div class="">Regards,</div>
<div class=""><br class="">
</div>
<div class="">Dr. Stanislav Martyanov,</div>
<div class="">Shirshov Institute of Oceanology,</div>
<div class="">Russia</div>
<div class=""><br class="">
</div>
</div>
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<div dir="ltr" class="">пн, 16 мар. 2020 г. в 09:27, Leming Van <<a href="mailto:ifanliming@outlook.com" target="_blank" class="">ifanliming@outlook.com</a>>:<br class="">
</div>
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<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
Hi, Matt</div>
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<br class="">
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<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
Thank you for your advice. I'm sorry that I didn't provide enough information.</div>
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<br class="">
</div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
I downloaded the ERA5 dataset at <a href="https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels?tab=form" id="x_x_gmail-m_9130568462497490429x_gmail-m_-7181925027433042385gmail-m_-522896234706765667LPlnk942224" target="_blank" class="">https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels?tab=form</a></div>
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<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
And I selected precip[<span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">mean_total_precipitation_rate. kg m-2 s-1</span><span class="">], atemp[</span><span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">2m_temperature.
K</span><span class="">], swdown[</span><span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">mean_surface_downward_short_wave_radiation_flux. W m-2</span><span class="">], lwdown[</span><span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">mean_surface_downward_long_wave_radiation_flux.
W m-2</span><span class="">], uwind[</span><span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">10m_u_component_of_wind.</span><span class=""> <span class="x_Apple-converted-space"> </span></span><span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">m
s-1</span><span class="">], vwind[</span><span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">10m_v_component_of_wind.</span><span class=""> <span class="x_Apple-converted-space"> </span></span><span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">m
s-1</span><span class="">], because ERA5 does not provide aqh directly, I used air pressure[</span><span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">surface_pressure</span><span class=""> <span class="x_Apple-converted-space"> </span></span><span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">Pa</span><span class="">]
and dewpoint temperature[</span><span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">2m_dewpoint_temperature</span><span class=""> <span class="x_Apple-converted-space"> </span></span><span class="" style="font-family:"Helvetica Neue"; font-size:12px; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:normal">K</span><span class="">]
to calculate <span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">aqh.</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<br class="">
</div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
</div>
<div class=""><span class="" style="font-family:Calibri,Helvetica,sans-serif">Since the data is hourly, I only downloaded the area of interest(bigger than South China Sea), and besides, the data is zonally aligned from 35N to 5S, I flipped it to 5S-35N. </span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<br class="">
</div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">I compared the ERA5 with NCEP, and I don't think there is much difference except for the short-wave radiation. Please check
the attachment.<br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">I only have one question, do you choose the same ERA5 variables like me? If not, could you tell me which variables you choose?</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"></span></span></div>
<span class="" style="font-family:Calibri,Helvetica,sans-serif">Please let me know if any other files are needed for diagnosis. </span><span class="" style="font-family:Calibri,Helvetica,sans-serif">Thanks in advance.</span>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">-Mike</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">Here is the setting of my data.exf<br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><br class="">
</span></span></div>
<div class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
<span class=""><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline"><span class=""># $Header: /u/gcmpack/MITgcm_contrib/eh3/llc/ecco-godae/input_50lev/data.exf,v 1.1 2007/03/06 19:13:51 heimbach
Exp $<br class="">
</span>
<div class="">#<br class="">
</div>
<div class=""># *********************<br class="">
</div>
<div class=""># External Forcing Data<br class="">
</div>
<div class=""># *********************<br class="">
</div>
<div class=""> &EXF_NML_01<br class="">
</div>
<div class=""> useAtmWind = .TRUE.,<br class="">
</div>
<div class=""># rotateStressOnAgrid = .TRUE.,<br class="">
</div>
<div class=""> exf_iprec = 32,<br class="">
</div>
<div class=""> exf_yftype = 'RL',<br class="">
</div>
<div class=""> useExfYearlyFields = .false.,<br class="">
</div>
<div class=""> twoDigitYear = .false.,<br class="">
</div>
<div class=""> useExfCheckRange =.false.,<br class="">
</div>
<div class=""> &<br class="">
</div>
<div class=""><br class="">
</div>
<div class=""> &EXF_NML_02<br class="">
</div>
<div class=""> climsstfile = 'woa13_sst_monthly_globe_relax.box',<br class="">
</div>
<div class=""> climsssfile = 'woa13_sss_monthly_globe_relax.box',<br class="">
</div>
<div class=""> precipfile = 'era5_prate_2002-2005_hourly.box',<br class="">
</div>
<div class=""> atempfile = 'era5_air_2002-2005_hourly.box',<br class="">
</div>
<div class=""> aqhfile = 'era5_shum_2002-2005_hourly.box',<br class="">
</div>
<div class=""> swdownfile = '',<br class="">
</div>
<div class=""> swfluxfile = 'era5_nswrs_2002-2005_hourly.box',<br class="">
</div>
<div class=""> lwfluxfile = '',<br class="">
</div>
<div class=""> lwdownfile = 'era5_dlwrf_2002-2005_hourly.box',<br class="">
</div>
<div class=""> uwindfile = 'era5_uwnd_2002-2005_hourly.box',<br class="">
</div>
<div class=""> vwindfile = 'era5_vwnd_2002-2005_hourly.box',<br class="">
</div>
<div class=""> runofffile = 'run-off.bin_1x1',<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> climsststartdate1 = 20020101,<br class="">
</div>
<div class=""> climsststartdate2 = 000000,<br class="">
</div>
<div class=""> climsstperiod = -12,<br class="">
</div>
<div class=""> climsssstartdate1 = 20020101,<br class="">
</div>
<div class=""> climsssstartdate2 = 000000,<br class="">
</div>
<div class=""> climsssperiod = -12,<br class="">
</div>
<div class=""> runoffstartdate1 = 20020101,<br class="">
</div>
<div class=""> runoffstartdate2 = 000000,<br class="">
</div>
<div class=""> runoffperiod = -12,<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> precipstartdate1=20020101,<br class="">
</div>
<div class=""> precipstartdate2=000000,<br class="">
</div>
<div class=""> precipperiod=3600.0,<br class="">
</div>
<div class=""> atempstartdate1=20020101,<br class="">
</div>
<div class=""> atempstartdate2=000000,<br class="">
</div>
<div class=""> atempperiod=3600.0,<br class="">
</div>
<div class=""> aqhstartdate1=20020101,<br class="">
</div>
<div class=""> aqhstartdate2=000000,<br class="">
</div>
<div class=""> aqhperiod=3600.0,<br class="">
</div>
<div class=""> swdownstartdate1=20020101,<br class="">
</div>
<div class=""> swdownstartdate2=000000,<br class="">
</div>
<div class=""> swdownperiod=3600.0,<br class="">
</div>
<div class=""> lwfluxstartdate1=20020101,<br class="">
</div>
<div class=""> lwfluxstartdate2=000000,<br class="">
</div>
<div class=""> lwfluxperiod=3600.0,<br class="">
</div>
<div class=""> swfluxstartdate1=20020101,<br class="">
</div>
<div class=""> swfluxstartdate2=000000,<br class="">
</div>
<div class=""> swfluxperiod=3600.0,<br class="">
</div>
<div class=""> lwdownstartdate1=20020101,<br class="">
</div>
<div class=""> lwdownstartdate2=000000,<br class="">
</div>
<div class=""> lwdownperiod=3600.0,<br class="">
</div>
<div class=""> uwindstartdate1=20020101,<br class="">
</div>
<div class=""> uwindstartdate2=000000,<br class="">
</div>
<div class=""> uwindperiod=3600.0,<br class="">
</div>
<div class=""> vwindstartdate1=20020101,<br class="">
</div>
<div class=""> vwindstartdate2=000000,<br class="">
</div>
<div class=""> vwindperiod=3600.0,<br class="">
</div>
<div class=""> hfluxstartdate1=20020101,<br class="">
</div>
<div class=""> hfluxstartdate2=000000,<br class="">
</div>
<div class=""> hfluxperiod=3600.0,<br class="">
</div>
<div class=""> sfluxstartdate1=20020101,<br class="">
</div>
<div class=""> sfluxstartdate2=000000,<br class="">
</div>
<div class=""> sfluxperiod=3600.0,<br class="">
</div>
<div class=""> ustressstartdate1=20020101,<br class="">
</div>
<div class=""> ustressstartdate2=000000,<br class="">
</div>
<div class=""> ustressperiod=3600.0,<br class="">
</div>
<div class=""> vstressstartdate1=20020101,<br class="">
</div>
<div class=""> vstressstartdate2=000000,<br class="">
</div>
<div class=""> vstressperiod=3600.0,<br class="">
</div>
<div class=""> &<br class="">
</div>
<div class=""><br class="">
</div>
<div class=""> &EXF_NML_03<br class="">
</div>
<div class=""> exf_inscal_precip=1.,<br class="">
</div>
<div class=""> exf_offset_atemp=0.0,<br class="">
</div>
<div class=""> exf_inscal_runoff = 3.1710e-08,<br class="">
</div>
<div class=""> &<br class="">
</div>
<div class=""><br class="">
</div>
<div class=""> &EXF_NML_04<br class="">
</div>
<div class=""> precip_lon0 = 95.0D0,<br class="">
</div>
<div class=""> precip_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> precip_lat0 = -5.0D0,<br class="">
</div>
<div class=""> precip_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> precip_nlon = 160,<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> precip_nlat = 160,<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> atemp_lon0 = 95.0D0,<br class="">
</div>
<div class=""> atemp_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> atemp_lat0 = -5.0D0,<br class="">
</div>
<div class=""> atemp_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> atemp_nlon = 160,<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> atemp_nlat = 160,<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> aqh_lon0 = 95.0D0,<br class="">
</div>
<div class=""> aqh_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> aqh_lat0 = -5.0D0,<br class="">
</div>
<div class=""> aqh_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> aqh_nlon = 160,<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> aqh_nlat = 160,<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> swdown_lon0 = 95.0D0,<br class="">
</div>
<div class=""> swdown_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> swdown_lat0 = -5.0D0,<br class="">
</div>
<div class=""> swdown_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> swdown_nlon = 160,<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> swdown_nlat = 160,<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> lwflux_lon0 = 95.0D0,<br class="">
</div>
<div class=""> lwflux_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> lwflux_lat0 = -5.0D0,<br class="">
</div>
<div class=""> lwflux_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> lwflux_nlon = 160,<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> lwflux_nlat = 160,<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> swflux_lon0 = 95.0D0,<br class="">
</div>
<div class=""> swflux_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> swflux_lat0 = -5.0D0,<br class="">
</div>
<div class=""> swflux_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> swflux_nlon = 160,<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> swflux_nlat = 160,<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> lwdown_lon0 = 95.0D0,<br class="">
</div>
<div class=""> lwdown_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> lwdown_lat0 = -5.0D0,<br class="">
</div>
<div class=""> lwdown_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> lwdown_nlon = 160,<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> lwdown_nlat = 160,<br class="">
</div>
<div class="">#<br class="">
</div>
<div class=""> uwind_lon0 = 95.0D0,<br class="">
</div>
<div class=""> uwind_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> uwind_lat0 = -5.0D0,<br class="">
</div>
<div class=""> uwind_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> uwind_nlon = 160,<br class="">
</div>
<div class=""> uwind_nlat = 160,<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> vwind_lon0 = 95.0D0,<br class="">
</div>
<div class=""> vwind_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> vwind_lat0 = -5.0D0,<br class="">
</div>
<div class=""> vwind_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> vwind_nlon = 160,<br class="">
</div>
<div class=""> vwind_nlat = 160,<br class="">
</div>
<div class="">#<br class="">
</div>
<div class=""> ustress_lon0 = 95.0D0,<br class="">
</div>
<div class=""> ustress_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> ustress_lat0 = -5.0D0,<br class="">
</div>
<div class=""> ustress_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> ustress_nlon = 160,<br class="">
</div>
<div class=""> ustress_nlat = 160,<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> vstress_lon0 = 95.0D0,<br class="">
</div>
<div class=""> vstress_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> vstress_lat0 = -5.0D0,<br class="">
</div>
<div class=""> vstress_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> vstress_nlon = 160,<br class="">
</div>
<div class=""> vstress_nlat = 160,<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class="">#<br class="">
</div>
<div class=""> hflux_lon0 = 95.0D0,<br class="">
</div>
<div class=""> hflux_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> hflux_lat0 = -5.0D0,<br class="">
</div>
<div class=""> hflux_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> hflux_nlon = 160,<br class="">
</div>
<div class=""> hflux_nlat = 160,<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> sflux_lon0 = 95.0D0,<br class="">
</div>
<div class=""> sflux_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> sflux_lat0 = -5.0D0,<br class="">
</div>
<div class=""> sflux_lat_inc = 160*0.25D0,<br class="">
</div>
<div class=""> sflux_nlon = 160,<br class="">
</div>
<div class=""> sflux_nlat = 160,<br class="">
</div>
<div class="">#<br class="">
</div>
<div class=""> runoff_lon0 = 0.50D0,<br class="">
</div>
<div class=""> runoff_lon_inc = 1.0D0,<br class="">
</div>
<div class=""> runoff_lat0 = -79.5D0,<br class="">
</div>
<div class=""> runoff_lat_inc = 159*1.0D0,<br class="">
</div>
<div class=""> runoff_nlon = 360,<br class="">
</div>
<div class=""> runoff_nlat = 160,<br class="">
</div>
<div class="">#<br class="">
</div>
<div class=""> climsst_lon0 = -179.875D0,<br class="">
</div>
<div class=""> climsst_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> climsst_lat0 = -89.875D0,<br class="">
</div>
<div class=""> climsst_lat_inc = 719*0.25D0,<br class="">
</div>
<div class=""> climsst_nlon = 1440,<br class="">
</div>
<div class=""> climsst_nlat = 720,<br class="">
</div>
<div class="">#<br class="">
</div>
<div class=""> climsss_lon0 = -179.875D0,<br class="">
</div>
<div class=""> climsss_lon_inc = 0.25D0,<br class="">
</div>
<div class=""> climsss_lat0 = -89.875D0,<br class="">
</div>
<div class=""> climsss_lat_inc = 719*0.25D0,<br class="">
</div>
<div class=""> climsss_nlon = 1440,<br class="">
</div>
<div class=""> climsss_nlat = 720,<br class="">
</div>
<div class="">#<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> &<br class="">
</div>
<div class=""><br class="">
</div>
<div class=""> &EXF_NML_OBCS<span class="x_Apple-converted-space"> </span><br class="">
</div>
<div class=""> obcsNstartdate1 = 20020101,<br class="">
</div>
<div class=""> obcsNstartdate2 = 000000,<br class="">
</div>
<div class=""> obcsNperiod = 2628000.0,<br class="">
</div>
<div class=""> obcsEstartdate1 = 20020101,<br class="">
</div>
<div class=""> obcsEstartdate2 = 000000,<br class="">
</div>
<div class=""> obcsEperiod = 2628000.0,<br class="">
</div>
<div class=""> obcsSstartdate1 = 20020101,<br class="">
</div>
<div class=""> obcsSstartdate2 = 000000,<br class="">
</div>
<div class=""> obcsSperiod = 2628000.,<br class="">
</div>
<div class=""> &<br class="">
</div>
<span class=""></span><br class="">
</span></span></div>
<div id="x_x_gmail-m_9130568462497490429x_gmail-m_-7181925027433042385gmail-m_-522896234706765667appendonsend" class="">
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<font face="Calibri, sans-serif" class="" style="font-size:11pt"><b class="">发件人:</b><span class="x_Apple-converted-space"> </span>MITgcm-support <<a href="mailto:mitgcm-support-bounces@mitgcm.org" target="_blank" class="">mitgcm-support-bounces@mitgcm.org</a>>
代表 Matthew Mazloff <<a href="mailto:mmazloff@ucsd.edu" target="_blank" class="">mmazloff@ucsd.edu</a>><br class="">
<b class="">发送时间:</b><span class="x_Apple-converted-space"> </span>2020年3月16日 0:44<br class="">
<b class="">收件人:</b><span class="x_Apple-converted-space"> </span><a href="mailto:mitgcm-support@mitgcm.org" target="_blank" class="">mitgcm-support@mitgcm.org</a><span class="x_Apple-converted-space"> </span><<a href="mailto:mitgcm-support@mitgcm.org" target="_blank" class="">mitgcm-support@mitgcm.org</a>><br class="">
<b class="">主题:</b><span class="x_Apple-converted-space"> </span>Re: [MITgcm-support] 转发: The obvious difference between ERA5 and NCEP-R1 forcing</font>
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<div class="">Hi Mike
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<div class="">It is possible it could give worse results, but very unlikely. However its too hard for me to diagnose what is going on. There are many variables to your problem.</div>
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<div class="">For ERA5 I have this in my data.exf:</div>
<div class=""> &EXF_NML_03<br class="">
exf_offset_atemp = 273.15,<br class="">
exf_inscal_swdown = -1.0,<br class="">
exf_inscal_lwdown = -1.0,<br class="">
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<div class="">Not sure how to help you, </div>
<div class="">Matt</div>
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<div class="">On Mar 15, 2020, at 5:41 AM, Leming Van <<a href="mailto:ifanliming@outlook.com" target="_blank" class="">ifanliming@outlook.com</a>> wrote:</div>
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<span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">Hi, everyone</span><br class="">
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Recently I tried to change forcing dataset from NCEP-R1(6-hourly) to ERA5(hourly), but the results of them look so different. I compared the results of NCEP-R1 with the reanalysis data of HYCOM, and these two data look similar. </div>
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Did I pick the wrong variables from ERA5? Or d<span class="" style="margin:0px">oes this mean that higher temporal and spatial resolution atmospheric forcing ERA5 results in worse simulation results than lower resolution NCEP-R1?</span></div>
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I put the results at here, <a href="https://1drv.ms/u/s!AoS5GLJhmvDtjB5Ovnz63FidKeMo?e=c2hS7z" id="x_x_gmail-m_9130568462497490429x_gmail-m_-7181925027433042385gmail-m_-522896234706765667LPlnk425773" target="_blank" class="">https://1drv.ms/u/s!AoS5GLJhmvDtjB5Ovnz63FidKeMo?e=c2hS7z</a></div>
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Suggestions are<span class=""> </span><span class="" style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline">welcome</span>.<br class="">
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-Mike</div>
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