[ecco-support] ecco-support Digest, Vol 84, Issue 9

[Justin Campbell]

Hello Ou,


Thank you for the quick responses to my questions; they succinctly answer
what I am trying to accomplish. I was not previously aware of the 'SIarea'
dataset so I'll be able to incorporate this into my analysis to
differentiate ice coverages.

Best,


Justin

On Thu, Mar 23, 2023 at 4:02 PM <ecco-support-request at mit.edu> wrote:

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> Today's Topics:
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>    1. Concern Regarding Closure of Heat and Freshwater Flux for
>       ECCOV4R4 (Justin Campbell)
>    2. Re: [EXTERNAL] Concern Regarding Closure of Heat and
>       Freshwater Flux for ECCOV4R4 (Wang, Ou (US 329B))
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 23 Mar 2023 14:37:29 -0500
> From: Justin Campbell <campbelljustin989 at gmail.com>
> To: ecco-support at mit.edu
> Cc: "Heimbach, Patrick" <heimbach at oden.utexas.edu>
> Subject: [ecco-support] Concern Regarding Closure of Heat and
>         Freshwater Flux for ECCOV4R4
> Message-ID:
>         <
> CAHp-uWW1DTOz8rVS6yLTBtr5TLXVkE3c4qsLGa9Ri1JF9QME1g at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hello,
>
>
> My name is Justin Campbell; I am a research engineering assistant working
> under Patrick Heimbach on a data analysis project using ECCOv4r4 datasets
> from the ECCO Drive. There are a few questions that I have with regards to
> the datasets that close the heat and freshwater flux budgets for the ocean
> surface:
>
> 1) In developing a residual plot of the net heat flux through the ocean
> surface from sea-ice-ocean-surface transfer (in areas with ice cover) and
> from atmosphere-ocean-surface transfer (in areas without ice cover) it
> appears the dataset, 'EXFqnet', is not closed by taking the sum of the
> datasets:  'EXFlwnet', 'EXFswnet', 'EXFhl', and 'EXFhs'. Are there any
> datasets that I am missing here?
>
> 2) Similarly, in developing a residual plot of the net freshwater flux
> through the ocean surface, can I be provided with a confirmation as to
> whether or not the dataset, 'EXFempmr' is closed by taking the sum of
> the datasets: 'EXFroff', 'EXFevap', and 'EXFpreci'?
>
> 3) Lastly, is there documentation available that differentiates individual
> grid points in these datasets that correspond to areas with ice cover from
> those that do not over time? I would like to be able to use this
> distinction in my analysis.
>
>
> Best Regards,
>
>
>
> Justin Campbell
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> ------------------------------
>
> Message: 2
> Date: Thu, 23 Mar 2023 21:02:10 +0000
> From: "Wang, Ou (US 329B)" <ou.wang at jpl.nasa.gov>
> To: "ECCO support list, wider membership" <ecco-support at mit.edu>
> Cc: "Heimbach, Patrick" <heimbach at oden.utexas.edu>
> Subject: Re: [ecco-support] [EXTERNAL] Concern Regarding Closure of
>         Heat and Freshwater Flux for ECCOV4R4
> Message-ID:
>         <
> BLAPR09MB617990BF11D872619D14B61AC4879 at BLAPR09MB6179.namprd09.prod.outlook.com
> >
>
> Content-Type: text/plain; charset="windows-1252"
>
> Hello Justin,
>
> The answers to your first two questions are yes, both ?EXFqnet? and
> ?EXFempmr? can be closed only by these components you listed in your email.
> There are no other flux components to close EXFqnet? and ?EXFempmr?. I
> wonder if you might miss the minus sign in some of the components in your
> calculation. The exact equations to close ?EXFqnet? and ?EXFempmr? are as
> follows. Also, see my answer to your third question below.
>
> 1) EXFqnet = -EXFhs -EXFhl + EXFlwnet + EXFswnet
> 2) EXFempmr = EXFevap - EXFpreci - EXFroff
> 3) There are no documentation that exactly differentiates ice-covered and
> ice-free grid points at each time step. However, you can use the daily-mean
> SIarea to differentiate ice-covered and ice-free grid points on daily mean
> basis.
>
> Best,
> Ou Wang
>
> From: ecco-support <ecco-support-bounces at mit.edu> on behalf of Justin
> Campbell <campbelljustin989 at gmail.com>
> Date: Thursday, March 23, 2023 at 12:38 PM
> To: ecco-support at mit.edu <ecco-support at mit.edu>
> Cc: Heimbach, Patrick <heimbach at oden.utexas.edu>
> Subject: [EXTERNAL] [ecco-support] Concern Regarding Closure of Heat and
> Freshwater Flux for ECCOV4R4
> Hello,
>
>
> My name is Justin Campbell; I am a research engineering assistant working
> under Patrick Heimbach on a data analysis project using ECCOv4r4 datasets
> from the ECCO Drive. There are a few questions that I have with regards to
> the datasets that close the heat and freshwater flux budgets for the ocean
> surface:
>
> 1) In developing a residual plot of the net heat flux through the ocean
> surface from sea-ice-ocean-surface transfer (in areas with ice cover) and
> from atmosphere-ocean-surface transfer (in areas without ice cover) it
> appears the dataset, 'EXFqnet', is not closed by taking the sum of the
> datasets:  'EXFlwnet', 'EXFswnet', 'EXFhl', and 'EXFhs'. Are there any
> datasets that I am missing here?
>
> 2) Similarly, in developing a residual plot of the net freshwater flux
> through the ocean surface, can I be provided with a confirmation as to
> whether or not the dataset, 'EXFempmr' is closed by taking the sum of the
> datasets: 'EXFroff', 'EXFevap', and 'EXFpreci'?
>
> 3) Lastly, is there documentation available that differentiates individual
> grid points in these datasets that correspond to areas with ice cover from
> those that do not over time? I would like to be able to use this
> distinction in my analysis.
>
>
> Best Regards,
>
>
>
> Justin Campbell
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> End of ecco-support Digest, Vol 84, Issue 9
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