<div dir="ltr">Thank you! Based on these examples, it seems like you need to use the exf package to prescribe the forcing. Is that correct? </div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, Jul 2, 2025 at 10:24 AM Martin Losch <<a href="mailto:Martin.Losch@awi.de">Martin.Losch@awi.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>It should work.<div>There are a few examples in verification, how to do this in matlab, e.g.,<div>offline_exf_seaice/input/gendata.m (x,y,t)</div><div>and python, e.g.,</div><div><div>seaice_itd/input/gendata.py [t,y,x]</div></div><div><br></div><div>The format should be ieee-be unblocked, with the fasted dimension (x) first (the “fortran” way).</div><div><br></div><div>Make sure via diagnostics, that your forcing fields look as expected. Often scrambled forcing fields give you a clue, where things went south.</div><div><br></div><div>Martin</div><div><font face="Menlo"><br></font><div><br><blockquote type="cite"><div>On 2. Jul 2025, at 16:07, Suhani Dalal <<a href="mailto:suhani.dalal@yale.edu" target="_blank">suhani.dalal@yale.edu</a>> wrote:</div><br><div><div dir="ltr">Hello,<div><br></div><div>I am trying to implement a time-dependent wind forcing in my model. Based on documentation here, <a href="https://mitgcm.readthedocs.io/en/latest/getting_started/getting_started.html," target="_blank">https://mitgcm.readthedocs.io/en/latest/getting_started/getting_started.html</a>, it seems like the zonal and meridional wind files have to be 2D. But based on prior examples, like in tutorial_global_oce_biogeo, and previous documentation here, <a href="https://mitgcm.org/public/r2_manual/latest/online_documents/node104.html" target="_blank">https://mitgcm.org/public/r2_manual/latest/online_documents/node104.html</a>, the 3D configuration seems possible using periodicExternalForcing. I followed the example and documentation for the time-dependent forcing exactly, formatting it as (x,y,t), yet I am seeing numerical instabilities. </div><div><br></div><div>Does the model still support time-dependent periodic forcings? And if so, could you explain the format of the input file/any other variations required in the data file? </div><div><br></div><div>Thank you so much! </div><div><br></div><div>Best,</div><div>Suhani </div></div>
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