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<div>On Jul 16, 2024, at 7:59 AM, Joe Smith <jxh207256@gmail.com> wrote:</div>
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<div style="font-family: Arial; font-size: 14px; margin: 0px;">Dear professors,</div>
<div style="font-family: Arial; font-size: 14px; margin: 0px;"> I am a doctoral student. And I want to download ECCO2 mixed layer depth data (<a href="https://ecco.jpl.nasa.gov/drive/files/ECCO2/cube92_latlon_quart_90S90N/daily/MXLDEPTH" target="_blank">https://ecco.jpl.nasa.gov/drive/files/ECCO2/cube92_latlon_quart_90S90N/daily/MXLDEPTH</a> )
and compare it with my MODEL.</div>
<div style="font-family: Arial; font-size: 14px; margin: 0px;"> My question is,</div>
<div style="font-family: Arial; font-size: 14px; margin: 0px;"> 1. What is the
<b>definition of mixed layer depth</b> for the ECCO2 data ?</div>
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<div style="font-family: Arial; font-size: 14px; margin: 0px;"> 2. Which <b>variable</b> is used to calculate the mixed layer depth ? potential temperature? potential density? or in-situ density?</div>
<div style="font-family: Arial; font-size: 14px; margin: 0px;"> 3. What is the
<b>criteria</b> of the mixed layer depth ? e.g., if potential density is used to calculated mixed layer depth, and I suppose the reference depth is 10 meters, and what is the criteria of density difference between the density at the mixed layer depth and the
density at the reference depth (10 meters)?</div>
<div style="font-family: Arial; font-size: 14px; margin: 0px;"> Looking forward to hearing from you soon.</div>
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Hi Joe,</div>
<div>For ECCO, we use the default criterion for calculating MLD<br>
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that is, Kara et al method.
<div>See source code here</div>
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<div>It involves potential temperature and salinity,</div>
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<div>Hope it helps</div>
<div>Hong</div>
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