[MITgcm-devel] KPP diagnostics

[Jean-Michel Campin]

Ryan,

Yes, added between checkpoint62d and (recent) checkpoint62e.
Cheers,
Jean-Michel

On Fri, Apr 16, 2010 at 03:22:35PM -0400, Ryan Abernathey wrote:
> Was this suggestion implemented yet?
>> new diagnostic directly from
>> kpp_transport_t.F (which can be used to close a Temp. budget)
>
>
> Thanks,
> Ryan
>
> On Mar 31, 2010, at 5:55 PM, Jean-Michel Campin wrote:
>
>> Hi,
>>
>> I am going to add 2 diagnostics to KPP pkg for
>> the non-local flux of temp. and salt that KPP produces
>> (i.e., from KPP_TRANSPORT_XX ).
>>
>> I was also tempted to replace the KPPghat diagnostics
>> with something more useful which incorporates the KPPdiffKz:
>> Since it is the product KPPghat*KPPdiffKz which matters,
>> and given that short time variation of both (which have no
>> reason not to be correlated) can be significant,
>> the product of the 2 time-ave is very likely to be quiet
>> far from the time-ave of the product.
>> It has also the advantage of a simpler interpretation:
>> the product is just the fraction of the surface flux which is
>> treated as non local (no unit, instead of this funny s/m^2
>> for KPPghat).
>>
>> Then I would propose to just pick one KPPdiffKz (for instance,
>> KPPdiffKzS for salinity, since it's also used for Ptracers),
>> and have only 1 diag: "KPPghatS" for KPPghat*KPPdiffKzS (no unit).
>>
>> For temperature (KPPghat*KPPdiffKzT), it's probably not too different
>> from the one computed for salinity (might be in fact a better
>> time-ave value that what we have now, for the reason above).
>> And to get a precise diagnostic of KPP-non-local effect
>> on temperature, there would be this new diagnostic directly from
>> kpp_transport_t.F (which can be used to close a Temp. budget).
>>
>> Suggestions/Critics ?
>>
>> Cheers,
>> Jean-Michel
>>
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>
>
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