[MITgcm-support] Ocean currents veering due to bathymetry

[kunal madkaiker]

Dear MITgcm users,

I am trying to simulate ocean currents along the West coast of India in a
high resolution grid (360x780) for the month of September. For now, I am
providing monthly climatology of August Temperature and Salinity as initial
forcing along with September zonal and meridional wind stress. Currently,
using the Orlanski scheme for obcs and no boundary forcings. Model is
simulated for 10 days.

But the currents are not coming correct. The West Indian Coastal Current
(WICC) which flows equatorward (during Sept) isn't being captured at all.
After plotting the bathymetry, I observed that the currents are being
veered northward by the Arabian sea continental shelf (Please refer to
Picture1.png attached (Day 04-10)). Is that possible? My bathymetry bin
file is just a 2D mesh with depth values. Also, my coastal currents are
very weak.

Attaching my data,data.obcs and data.exf file. Please let me know if any
additional information is required from my end.
Kindly advise. All suggestions are welcomed.

Regards
Kunal
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20200724/335d8ca7/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: data.obcs
Type: application/octet-stream
Size: 655 bytes
Desc: not available
URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20200724/335d8ca7/attachment-0003.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: bathymetry.png
Type: image/png
Size: 127562 bytes
Desc: not available
URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20200724/335d8ca7/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: data
Type: application/octet-stream
Size: 2329 bytes
Desc: not available
URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20200724/335d8ca7/attachment-0004.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: data.exf
Type: application/octet-stream
Size: 905 bytes
Desc: not available
URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20200724/335d8ca7/attachment-0005.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Picture1.png
Type: image/png
Size: 651853 bytes
Desc: not available
URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20200724/335d8ca7/attachment-0003.png>