<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Hello<div><br></div><div>Are you using OBCS?</div><div>Perhaps your prescribed open boundary conditions are inconsistent with the interior flow. A restoring (sponge) layer may help.</div><div><br></div><div>Matt</div><div><br id="lineBreakAtBeginningOfMessage"><div><br><blockquote type="cite"><div>On May 12, 2025, at 10:43 PM, han <hylhwyjy@163.com> wrote:</div><br class="Apple-interchange-newline"><div><div data-ntes="ntes_mail_body_root" style="line-height: 1.7; font-size: 14px; font-family: Arial;"><div>Dear all,</div><div><br></div><div><div>I am using MITgcm to simulate the ocean current changes in an area, outputting it every 3 hours. In the data file, I have added topography, temperature, salinity, wind stress, flow velocity, and used forced fields(EXF). Starting from the third hour of the simulation, the direction of the ocean current showed a significant deviation from the measured data. Could it be that I haven't added boundaries yet? I'm not quite sure where the problem lies. I sincerely ask for your guidance on possible problem points.</div><div><br></div><div>The following are the details of the problem and the relevant data:</div><div>Attachment 1 shows the changes of ocean currents on the first day of the model.</div><div>Attachment 2 is my data file.</div><div><br></div><div>Looking forward to your reply.</div></div><div><br></div><div><div style="margin: 0px; word-break: break-word !important;"><div style="margin: 0px; word-break: break-word !important;"><span style="line-height: 1.5em; word-break: break-word !important;">Best regards,</span></div></div><div style="margin: 0px; word-break: break-word !important;"><span style="line-height: 1.5em; word-break: break-word !important;">Han</span></div><div style="margin: 0px; word-break: break-word !important;"><br style="word-break: break-word !important;"></div></div></div><img style="width:1px;height:1px" src="https://count.mail.163.com/beacon/webmail.gif?type=webmail_mailtrace&guid=pre_918f15240ba1fcfdd10dd60b5fefc1b9"><span id="cid:0C926273-219F-4A0C-A968-B0CE1FD63553"><the_changes_of_ocean_currents.png></span><span id="cid:685DD03A-ECD9-48AA-9294-D9A944B6B93E"><data.txt></span>_______________________________________________<br>MITgcm-support mailing list<br>MITgcm-support@mitgcm.org<br>https://urldefense.com/v3/__http://mailman.mitgcm.org/mailman/listinfo/mitgcm-support__;!!Mih3wA!FB1XVW5c7TDPS6yPljbMJty-zfewCKqj2QI7-RSXkxq4Yo6lpdRnywY0sXgMtMmhabx4TlzcOAzjuqsZDQI$ <br></div></blockquote></div><br></div></body></html>