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<div>Qihua,</div>
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<div>The v4 configuration specifies that the global ocean is partitioning into 96 30x30 tiles. Aligning the 96 tiles in one queue gives the X-direction size (NX) 96x30 and the Y-direction size (NY) 30. Note that x-direction and y-direction are not necessarily
the longitude and latitude directions. So 2880=96*30 in X-direction does NOT mean that there are 2880 grids in the longitudinal direction. </div>
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<div>The direction convention for the wind stress forcing is that positive is from east to west for ustr and from north to south for vstr. </div>
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<div>Best,</div>
<div>Ou Wang</div>
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<span style="font-weight:bold">From: </span><<a href="mailto:ecco-support-bounces@mit.edu">ecco-support-bounces@mit.edu</a>> on behalf of Qihua Peng <<a href="mailto:q7peng@ucsd.edu">q7peng@ucsd.edu</a>><br>
<span style="font-weight:bold">Reply-To: </span>"ECCO support list, wider membership" <<a href="mailto:ecco-support@mit.edu">ecco-support@mit.edu</a>><br>
<span style="font-weight:bold">Date: </span>Monday, December 4, 2017 at 1:53 PM<br>
<span style="font-weight:bold">To: </span>"<a href="mailto:ecco-support@mit.edu">ecco-support@mit.edu</a>" <<a href="mailto:ecco-support@mit.edu">ecco-support@mit.edu</a>><br>
<span style="font-weight:bold">Subject: </span>[ecco-support] Two questions about ECCO V4r2<br>
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<div>Dear teacher,</div>
<div>Nice to see you. My name is Qihua Peng, a student of UCSD. Recently I tried to rerun the ECCO v4r2, and I have two questions:</div>
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<div>1.In terms of the resolution of ECCO v4r2, the file (size.h) shows: sNx = 30,sNy = 30,OLx = 4,OLy = 4,nSx = 1,nSy = 1,nPx = 96,nPy = 1. It seems the resolution of ECCO v4r2 is : Nx = sNx*nSx*nPx=2880 in x direction and Ny = sNy*nSy*nPy=30
in y direction. The resolution seems too dense in zonal direction and too coarse in meridional direction. I think there must be something wrong for my understanding of the resolution of LLC90 grid.</div>
<div><b><i></i><u></u><sub></sub><sup></sup><strike></strike><br>
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<div>2. I have downloaded all the forcing data and I found all the wind stress data have reverse sign such as: westerly zonal wind should be positive in the value but in the forcing data of ECCO (<a href="ftp://mit.ecco-group.org/ecco_for_las/version_4/release2/input_forcing/" target="_blank">ftp://mit.ecco-group.org/<wbr>ecco_for_las/version_4/<wbr>release2/input_forcing/</a>)
it's negative, so I'd like to know why is that? Is it due to the LLC90 grid? if it is , I'd like to know how to plot this vector field correctly.</div>
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<div>Thanks for your kindness and help.</div>
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<div>Bests,</div>
<div>Qihua</div>
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