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Hello All</div>
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As in the subject, I am wondering if any MITgcm/adjoint users have ever used a (zero-dimensional) scalar (either static, or time dependent) as a control, and have any examples of doing so or any advice as to whether it is a good idea. As far as I know, it is
only possible to use 2D and 3D static and time varying fields.</div>
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<span style="color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">I know that it is possible to ensure that gradients of a genarr2d or gentim2d control are spatially constant e.g. by using a global sum of the control array
and adding to a scalar -- but this does not reduce the size of the gradient passed to lsopt or m1qn3, so im not sure if the results would be similar to a case where we simply consider the gradient of a scalar. So Im not sure if this is a suitable replacement.
Apologies if what Im saying is unclear.</span></div>
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Many thanks</div>
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Dan</div>
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<div><span style="font-size:12.8px">Daniel Goldberg, PhD (he/him)</span><br>
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<div dir="ltr"><span style="font-size:12.8px">Reader in Glaciology</span>
<div style="font-size:12.8px">School of Geosciences, University of Edinburgh<br>
<span style="color:rgb(0, 0, 0);font-family:arial, helvetica, clean, sans-serif;line-height:15px">Geography Building, Drummond Street, Edinburgh EH8 9XP</span><br>
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em: <a href="mailto:dan.goldberg@ed.ac.uk" target="_blank" style="color:rgb(17, 85, 204)" data-loopstyle="link">dan.goldberg@ed.ac.uk</a><br>
web: <a href="https://www.geos.ed.ac.uk/homes/dgoldber" target="_blank" style="color:rgb(17, 85, 204)">https://www.geos.ed.ac.uk/homes/dgoldber</a></div>
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