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<p class="MsoNormal"><span lang="EN-US">Thanks @ Matthew and @ Dimitris.</span></p>
<p class="MsoNormal"><span lang="EN-US">The problem is solved by adding ‘useOBCStides = .TRUE.,’ in data.obcs.</span></p>
<p class="MsoNormal"><span lang="EN-US">However, this is not updated in the latest manual (<a href="https://mitgcm.readthedocs.io/en/latest/phys_pkgs/obcs.html">8.3.1. OBCS: Open boundary conditions for regional modeling — MITgcm checkpoint67v-28-g8d431ea01
documentation</a>), and I would kindly suggest the developers to add this to ‘Table 8.2 OBCS runtime parameters’.</span></p>
<p class="MsoNormal"><span lang="EN-US">Have a nice weekend.</span></p>
<p class="MsoNormal"><span lang="EN-US">Pengyang</span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif;color:black">----------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif;color:black">SONG Pengyang</span><span style="color:black">（宋朋洋）</span><span lang="EN-US" style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif;color:black">PhD candidate in Paleoclimate Dynamics<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif;color:black">Department of Climate Sciences<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif;color:black">Alfred Wegener Institute,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif;color:black">Helmholtz Centre for Polar and Marine Research<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif;color:black">Address: Bussestr. 24, 27570 Bremerhaven, Germany<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif;color:black">Tel: (+49) 471 4831 1811<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif;color:black">Mobile: (+49) 17667211481 (DE)<o:p></o:p></span></p>
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</span><b>发送时间<span lang="EN-US">: </span></b><span lang="EN-US">2021</span>年<span lang="EN-US">2</span>月<span lang="EN-US">26</span>日<span lang="EN-US"> 18:00<br>
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</span><b>主题<span lang="EN-US">: </span></b><span lang="EN-US">MITgcm-support Digest, Vol 212, Issue 15</span></p>
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Today's Topics:<br>
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1. Re: [EXTERNAL] OBCS add_tide does not change open boundary<br>
velocities (Matthew Mazloff)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Fri, 26 Feb 2021 07:15:20 -0800<br>
From: Matthew Mazloff <mmazloff@ucsd.edu><br>
To: mitgcm-support@mitgcm.org<br>
Subject: Re: [MITgcm-support] [EXTERNAL] OBCS add_tide does not change<br>
open boundary velocities<br>
Message-ID: <2FF9EE5B-7FD1-4C6A-80B0-7330704DBB63@ucsd.edu><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Agree with Dimitris. Specifically I would try adding:<br>
<br>
useOBCStides = .TRUE.,<br>
<br>
in data.obcs<br>
<br>
<br>
Matt<br>
<br>
<br>
> On Feb 26, 2021, at 4:34 AM, Dimitris Menemenlis <menemenlis@jpl.nasa.gov> wrote:<br>
> <br>
> Hi Penyang, as a penance , I am trying to answer before your esteemed AWI colleague<br>
> but I don?t see anything wrong with the set-up that you describe below.<br>
> <br>
> I wonder if it would help to try and use as many of the options from<br>
> MITgcm/verification/seaice_obcs/code<br>
> MITgcm/verification/seaice_obcs/input.tides<br>
> initially, less the sea ice, to see if that fixes problem.<br>
> And then you can progress back, in steps, to your set-up.<br>
> <br>
> D.<br>
> <br>
> <br>
>> On Feb 26, 2021, at 1:08 AM, SONG Pengyang <Peterspy@outlook.com <<a href="mailto:Peterspy@outlook.com">mailto:Peterspy@outlook.com</a>>> wrote:<br>
>> <br>
>> Dear MITgcm developers,<br>
>> I am trying to setup an idealized 2D experiment with obcs package (e.g, Nx*Ny*Nr=500*1*30).<br>
>> The idea is that I want to give a tidal component through the west bound as OBWAmFile (Am=0.1m/s) and OBWPhFile (Ph=0).<br>
>> What I changed to codes are:<br>
>> (1) ?#define ALLOW_OBCS_TIDES? in OBCS_OPTIONS.h<br>
>> (2) ?tidalComponents = 1? in OBCS_PARAMS.h<br>
>> (3) ?#define NONLIN_FRSURF? in CPP_OPTIONS.h<br>
>> Data.obcs:<br>
>> ???<br>
>> &OBCS_PARM01<br>
>> OB_Ieast=-1,<br>
>> OB_Iwest=1,<br>
>> OBWAmFile='OBWAm.bin',<br>
>> OBWPhFile='OBWPh.bin',<br>
>> tidalPeriod=43200.0,<br>
>> &<br>
>> ???<br>
>> However, tidal signals are not found in the model result and the west and east two colomns of u are constant zeros.<br>
>> No errors regarding to the I/O are reported, so I think the files I input are correct.<br>
>> Is there any other changes I should do to the obcs? I.e., should I add sponge layer at the west bound and Orlansky condition at the east?<br>
>> Kind regards,<br>
>> Pengyang<br>
>> <br>
>> <br>
>> ----------------------------------------------------------------<br>
>> SONG Pengyang?????<br>
>> PhD candidate in Paleoclimate Dynamics<br>
>> Department of Climate Sciences<br>
>> Alfred Wegener Institute,<br>
>> Helmholtz Centre for Polar and Marine Research<br>
>> Address: Bussestr. 24, 27570 Bremerhaven, Germany<br>
>> Tel: (+49) 471 4831 1811<br>
>> Mobile: (+49) 17667211481 (DE)<br>
>> (+86) 15762264643 (CN)<br>
>> <br>
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