<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<div class="x_elementToProof" style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<span class="x_x_x_x_elementToProof">Hi,</span>
<div class="x_x_x_x_elementToProof"><br>
</div>
<div class="x_x_x_x_elementToProof">Thanks for reading this email. This question is about the salt advective fluxes in ECCO diagnostics. The out-of-the-box monthly mean vertical salt advection looks something like this. (this is the tile containing the majority
of Africa)<br>
</div>
<div class="x_x_x_x_elementToProof"><img class="x_x_x_x_w-581 x_x_x_x_h-405 x_x_x_ADIae x_x_x_w-581 x_x_x_h-405 x_x_ADIae x_x_w-581 x_x_h-405 x_ADIae x_w-581 x_h-405 ADIae w-581 h-405" size="103401" style="max-width:100%;min-width:auto;min-height:auto;height:auto;cursor:pointer" contenttype="image/png" data-outlook-trace="F:5|T:5" src="cid:24434b5f-e0cd-4d0e-a520-dec995e47a01"><br>
</div>
<div class="x_x_x_x_elementToProof"><br>
</div>
<div class="x_x_x_x_elementToProof">You can clearly see the lines and patches here as well as in the daily mean diagnostics. However, WVELMASS looks really smooth. I also don't see similar patchiness in other MITgcm output at hand.
<br>
</div>
<div class="x_x_x_x_elementToProof"><br>
</div>
<div class="x_x_x_x_elementToProof">My question is maybe kind of silly: why is the diagnostic field so patchy?<br>
</div>
<div class="x_x_x_x_elementToProof"><br>
</div>
<div class="x_x_x_x_elementToProof">I am doing a Lagrangian-budget hybrid study. One of the steps is to emulate the salt fluxed using U and S alone. I came across this problem when I was comparing ADVx_SLT with U*S*dy*dz (I also tried to estimate the flux with
daily mean U and S using the DST3method). I realized that their difference is large, looks patchy, and most importantly, it is not quite correlated with du/dx or dv/dy. I would be happy to share my other attempts to understand it.
<br>
</div>
<div class="x_x_x_x_elementToProof"><br>
</div>
</div>
<div class="x_elementToProof" style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<span class="x_x_x_x_elementToProof">P.S. I can close the budget with the patchy diagnostic because advective fluxes in all 3 dimensions are patchy and they cancel each other out. Diagnostic for diffusion does not have this issue.
</span><br>
</div>
<div><span style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"></span></div>
<br>
</div>
<div>
<div id="Signature">
<div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size: 16pt; color: rgb(12, 136, 42);">Wenrui Jiang</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Ph.D. Student,</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Department of Earth & Planetary Sciences,</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Johns Hopkins University.</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Email: wjiang33@jh.edu</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
</div>
</div>
</div>
</body>
</html>