[MITgcm-support] freshwater flux in sea ice covered region

[Martin Losch]

Zhaomin,

when you run the model (with debugLevel>0, which is the default), there will be file called available_diagnostics.log. There you'll find a lot of information about the available diagnostics (as the name of the file implies).

You probably want the diagnostics
'EXFpreci'
'EXFroff '
'SIatmFW'
'SIempmr' and 'EXFempr' (I am not sure but the difference should be the net freshwater flux between ice and ocean.)
'SIfwSubl'

The thermodynamic growth of sea-ice (which can also be related to a freshwater flux) is 
SIdHbOCN+SIdHbATC+SIdHbATO+SIdHbFLO
I think

advection:
ADVxHEFF
ADVyHEFF
ADVxSNOW
ADVySNOW

I know it's confusing, but if you need more detail have a look at seaice_growth.F

Martin

On Apr 17, 2013, at 4:36 PM, "Wang, Zhaomin" <zwa at bas.ac.uk> wrote:

> 
> Thanks, Martin.
> 
> Yes, I want to know how to diagnose those terms related to freshwater flux in sea ice covered region, including 1-4 and advections of ice and snow.
> 
> Zhaomin
> ________________________________________
> From: Martin Losch [Martin.Losch at awi.de]
> Sent: Tuesday, April 16, 2013 6:00 PM
> To: Wang, Zhaomin
> Subject: Re: cube sphere 510 run
> 
> I don't see your question.
> 
> In the model there is
> 1. Precip = water in melting conditions that trickles through the ice, or snow under freezing conditions that accumulates
> 2. Runoff goes directly into the water
> 3. Evaporation/Sublimation
> 4. Freezing/melting term
> The sum of this is EmPmR (=fresh water flux) below the ice (after the ice has done its thing).
> Above the ice there is SIatmFW (Precip-Evap/sublimation-Runoff)
> 
> There is (lateral) advection if ice and advection of snow, which can also be diagnosed.
> 
> As usual, I recommend posting specific questions on the mailing list mitgcm-support at mitgcm.org
> 
> M.
> 
> On Apr 13, 2013, at 2:50 PM, "Wang, Zhaomin" <zwa at bas.ac.uk> wrote:
> 
>> Hi Martin,
>> 
>> Do you know where I can find a more detailed description of the calculation of freshwater flux associated with sea ice? I cannot see it in MITgcm manual.
>> 
>> Specifically, I want to know what causes the changes in freshwater flux in sea ice covered region, when total freshwater flux changes. Generally, freshwater flux consists of P-E+runoff and net sea ice melting/freezing term, but precipitation can fall as snow onto sea ice. If considering snow transport by sea ice, we have to know net sea ice and snow  formation or melting at one grid.
>> 
>> Thanks.
>> 
>> Zhaomin
>> 
>> ________________________________________
>> From: Martin Losch [Martin.Losch at awi.de]
>> Sent: Monday, July 25, 2011 8:43 AM
>> To: Wang, Zhaomin
>> Subject: Re: cube sphere 510 run
>> 
>> Hi Zhaomin,
>> 
>> I don't know, but my guess is, as usual: mitgcm-support at mitgcm.org
>> 
>> but you should first have a look at the utils/matlab directory.
>> 
>> Martin
>> 
>> On Jul 25, 2011, at 9:13 AM, Wang, Zhaomin wrote:
>> 
>>> Hi Martin,
>>> 
>>> Do you know who has the matlab script that can be used to compute residual streamfunction and eddy streamfunction in the SO on original cube sphere grids? I asked Hong Zhang at JPL, but he is not familiar with this.
>>> 
>>> Cheers,
>>> Zhaomin
>>> 
>>> -----Original Message-----
>>> From: Martin Losch [mailto:Martin.Losch at awi.de]
>>> Sent: 13 May 2011 20:15
>>> To: Wang, Zhaomin
>>> Subject: Re: cube sphere 510 run
>>> 
>>> Zhaomin,
>>> 
>>> the people who work with cs510 most are at JPL. There are few papers, that you can get from their web-page, but I recommend that you ask Dimitris Menemenlis. I have not yet done too much detailed evaluation of these runs.
>>> 
>>> Martin
>>> 
>>> On May 13, 2011, at 7:03 PM, Wang, Zhaomin wrote:
>>> 
>>>> Martin, do you know if we there is a comprehensive evaluation of the result from cube sphere 510 run? This is particular helpful to our project. Many thanks, zhaomin
>>>> 
>>>> British Antarctic Survey
>>>> High Cross, Madingley Road
>>>> Cambridge, CB3 0ET
>>>> UK
>>>> Tel: +44(0)1223221488
>>>> Fax: +44(0)1223221279
>>>> 
>>>> 
>>>> --
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>>> 
>> 
>> 
>> This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system.
> 
> 
> This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system.