[ecco-support] [EXTERNAL] Data of Version4/Release3

[Wang, Ou (US 329B)]

Dear Anne-Marie,

The model uses a curvilinear lat-lon-cap (LLC) grid, and its x- and y-directions are not necessarily along the zonal and meridional directions (See the attached figure).

We provide the rotated monthly-averaged stress along zonal (east-west) and meridional (north-south) direction: oceTAUE (https://ecco.jpl.nasa.gov/drive/files/Version4/Release3/nctiles_monthly/oceTAUE) and oceTAUN (https://ecco.jpl.nasa.gov/drive/files/Version4/Release3/nctiles_monthly/oceTAUN). The corresponding variables along the native x- and y-directions are oceTAUX<https://ecco.jpl.nasa.gov/drive/files/Version4/Release3/nctiles_monthly/oceTAUX> and oceTAUY<https://ecco.jpl.nasa.gov/drive/files/Version4/Release3/nctiles_monthly/oceTAUY>. For sea-ice free regions, these variables are the wind stress. But for sea-ice covered regions, these variables are the stress between the sea-ice and the liquid ocean.

More generally, one can use the Matlab routine calc_UV_zonmer.m<https://github.com/gaelforget/gcmfaces/blob/master/gcmfaces_calc/calc_UV_zonmer.m> in gcmfaces to rotate vectors along the native x- and y-direction to zonal and meridional directions (or vice versa), as pointed out by Hong.

Cheers,
Ou Wang


From: <ecco-support-bounces at mit.edu> on behalf of Anna-Marie Strehl <astrehl at geomar.de>
Reply-To: "ECCO support list, wider membership" <ecco-support at mit.edu>
Date: Friday, November 29, 2019 at 6:52 AM
To: "ecco-support at mit.edu" <ecco-support at mit.edu>
Subject: [EXTERNAL] [ecco-support] Data of Version4/Release3

Dear ECCO support team,

I am using ECCO/Version4/Release3 to analyse the North Atlantic. Therefore, I connect the tiles 0003 and 0011, which perfectly works for the data I used until now. For a new topic, I need the wind stress. Unfortunately, this occurs not to be continuous at the boundary between the tiles. Do you know  what is the reason for this bug? Is there something special I have to consider when using this variable?
To illustrate my problem, I produced a simple plot of the wind stress in zonal direction and one of the sea surface height (which is continuous). You can find the matlab-code and the resulting plots in the appendix.

Thanks in advance!
Best regards,
Anna-Marie Strehl

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