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Hi all,
<div class=""><br class="">
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<div class="">Mike is correct - f0 was chosen for the southern boundary and beta is chosen for the midpoint of the domain. This means the beta-plane approximation is centred in the domain, which makes most sense to me.</div>
<div class=""><br class="">
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<div class="">Cheers,</div>
<div class="">Ed</div>
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<span class="Apple-style-span" style="font-family: Tahoma; font-size: 13px;"><font face="Tahoma" size="2" class=""><span dir="ltr" style="font-size: 10pt;" class=""><font size="1" class=""><span style="font-size: 13px;" class=""><font size="2" class=""><b class="">Edward
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<div><br class="">
<blockquote type="cite" class="">
<div class="">On 18 Jun 2021, at 05:11, MICHAEL A SPALL <<a href="mailto:mspall@whoi.edu" class="">mspall@whoi.edu</a>> wrote:</div>
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Is it because f0 applies to the southern limit of the domain (f=f0+beta*(y-y0), where y0 is at j=1) and beta was chosen to be representative of the mid-latitude of the domain?</div>
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Mike</div>
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On 6/17/21 3:08 PM, Jeffery R Scott wrote:<br class="">
</div>
<blockquote type="cite" cite="mid:1623956886935.79562@mit.edu" style="font-family: Palatino-Roman; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<div style="margin-top: 0px; margin-bottom: 0px;" class="">Hi David,<br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">Thanks for alerting this to us. These numbers came from Ed Doddridge's SO setup, and values probably overlooked as the tutorial lat-lon domain evolved to final form...<br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">but not sure why they were originally chosen as such. Perhaps Ed can recall?<br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">Jeff<br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class="">
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<div id="divRplyFwdMsg" dir="ltr" class=""><font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">From:</b><span class="Apple-converted-space"> </span>MITgcm-support<span class="Apple-converted-space"> </span><a class="moz-txt-link-rfc2396E" href="mailto:mitgcm-support-bounces@mitgcm.org"><mitgcm-support-bounces@mitgcm.org></a><span class="Apple-converted-space"> </span>on
behalf of David Ferreira<span class="Apple-converted-space"> </span><a class="moz-txt-link-rfc2396E" href="mailto:dfer@mit.edu"><dfer@mit.edu></a><br class="">
<b class="">Sent:</b><span class="Apple-converted-space"> </span>Thursday, June 17, 2021 2:33 PM<br class="">
<b class="">To:</b><span class="Apple-converted-space"> </span><a class="moz-txt-link-abbreviated" href="mailto:mitgcm-support@mitgcm.org">mitgcm-support@mitgcm.org</a><br class="">
<b class="">Subject:</b><span class="Apple-converted-space"> </span>[MITgcm-support] Awkward parameters in tutorial_reentrant_channel</font>
<div class=""> </div>
</div>
<div class="">
<div class="WordSection1">
<div style="margin: 0in; font-size: 8.5pt; font-family: Menlo;" class=""><span class="s1">Hi all,</span></div>
<p class="p1" style="margin: 0in; font-size: 8.5pt; font-family: Menlo;"><span class="s1"> </span></p>
<div style="margin: 0in; font-size: 8.5pt; font-family: Menlo;" class=""><span class="s1">Having a look at the zonally reentrant channel in verification, in data we have:</span></div>
<p class="p1" style="margin: 0in; font-size: 8.5pt; font-family: Menlo;"><span class="s1"> </span></p>
<div style="margin: 0in; font-size: 8.5pt; font-family: Menlo;" class=""><span class="s1"># Coriolis parameter</span></div>
<div style="margin: 0in; font-size: 8.5pt; font-family: Menlo;" class=""><span class="apple-converted-space"> </span><span class="s1">f0=-1.363e-4,</span></div>
<div style="margin: 0in; font-size: 8.5pt; font-family: Menlo;" class=""><span class="apple-converted-space"> </span><span class="s1">beta=1.313e-11,</span></div>
<p class="p1" style="margin: 0in; font-size: 8.5pt; font-family: Menlo;"><span class="s1"> </span></p>
<div style="margin: 0in; font-size: 8.5pt; font-family: Menlo;" class=""><span class="s1">fo corresponds to a latitude of 70S, while beta corresponds to 55S.</span></div>
<p class="p1" style="margin: 0in; font-size: 8.5pt; font-family: Menlo;"><span class="s1"> </span></p>
<div style="margin: 0in; font-size: 8.5pt; font-family: Menlo;" class="">No big deal, but curious if this intentional and if so why. Artificially reinforcing beta effect?</div>
<p class="p1" style="margin: 0in; font-size: 8.5pt; font-family: Menlo;"> </p>
<div style="margin: 0in; font-size: 8.5pt; font-family: Menlo;" class="">Cheers,</div>
<div style="margin: 0in; font-size: 8.5pt; font-family: Menlo;" class="">David</div>
<p class="p1" style="margin: 0in; font-size: 8.5pt; font-family: Menlo;"> </p>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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