[ecco-support] Fwd: Re: ECCO2 Mixed Layer Depths Concerns

[Hong Zhang]

-------- Forwarded Message --------
Subject: 	Re: [ecco-support] ECCO2 Mixed Layer Depths Concerns
Date: 	Fri, 28 Apr 2017 12:48:59 -0700
From: 	HONG ZHANG <hong.zhang at ucla.edu>
To: 	Dimitris Menemenlis <dmenemenlis at gmail.com>, Moisan, John R. 
(WFF-610W) <john.r.moisan at nasa.gov>
CC: 	Daria Halkides <halkides at esr.org>



On 4/28/17 9:37 AM, Dimitris Menemenlis wrote:
> Daria or Hong, would you have looked at MXLDEPTH depth in the “cube92” 
> solution?
> ftp://ecco2.jpl.nasa.gov/data1/cube/cube92/lat_lon/quart_90S_90N/MXLDEPTH.nc/
>
> John, why not use the ECCO-V4, which is data-constrained?
> http://www.ecco-group.org/products.htm
> ECCO v4 is on a 1-degree grid, which is closer to your desired 2x2 
> degree grid.
>
> Dimitris Menemenlis
>
>> On Apr 26, 2017, at 9:41 AM, Moisan, John R. (WFF-610W) 
>> <john.r.moisan at nasa.gov <mailto:john.r.moisan at nasa.gov>> wrote:
>>
>> Hello ECCO2’ers,
>>
>> I would like to make use of the Mixed-Layer Depth model outputs from 
>> the global model runs 1992-present (Nov. 2016) to drive some simple 
>> 1D biogeochemical models for CDOM.  I have binned to model outputs 
>> from the jpg site into monthly 2x2 deg. grids.  One thing of concern 
>> that I have is the trends in the global MLDs (see attached figure), 
>> which are more extreme in the SO.  Is there an issue with maintaining 
>> correct ocean boundary layers, esp. in the SO for this model?  Has 
>> this been observed yet?
>>
Hi John,
You're right, MLD from cube92 run has bias in late stage
because it's a free run for the later period.
As Dimitris said, you can look at other ECCO product provided at the 
website.
Please see attached fig showing MLD from ECCOv4 and ECCO llc270 for an 
example,
where red line is for ECCOv4 (1992-2012) and blue line for ECCO llc270 
(2001-2015) in upper plot
also MLD for cube92 is also shown in lower plot for reference.

cheers
Hong
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