[MITgcm-support] Monthly averaged output of adjoint sensitivity with ECCOv4

[Xiaohui Liu]

Hi Gael,

I checked the adxx_*** output and found that the values in this file
are quite different from the same sensitivity of ADJ output. The ratio
between them is near 180. Is there any difference between these 2
sensitvity outputs?

Thanks,
Xiaohui

Message: 2
Date: Fri, 8 Feb 2019 16:23:04 -0500
From: gael forget <gforget at mit.edu>
To: <mitgcm-support at mitgcm.org>
Subject: Re: [MITgcm-support] Monthly averaged output of adjoint
        sensitivity with ECCOv4
Message-ID: <CB79DCDF-B1A0-4AA4-BC6F-639A0B704C23 at mit.edu>
Content-Type: text/plain; charset="us-ascii"

Hi Xiaohui,

> there seems no time-averaged output under regular settings. I saw there
are "adxx_" files with the default time frequency of 1209600s, which is 2
weeks.
Correct on both counts.

> Are the records in "adxx_" files the time-averaged output of adjoint
sensitivity?
Yes.

> If not, is there any other way to get the time-averaged output of adjoint
sensitivity in ECCOv4?
I believe the solution here may involve changing xx_gentim2d_period and
maybe activating new control terms via data.ctrl (you may need to provide
xx files filled with zeros to do this) so that the adxx output suits your
needs. There is documentation about these features @
https://mitgcm.readthedocs.io/en/latest/ocean_state_est/ocean_state_est.html
 <
https://mitgcm.readthedocs.io/en/latest/ocean_state_est/ocean_state_est.html
>

Hope this helps.

Cheers,
Gael
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