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================================================================ |
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Apr 03, 2010 |
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1) add diagnostics for KPP non-local flux of Temp, Salt and pTracers |
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(respectively: KPPg_TH, KPPg_SLT and KPPgTrXX for tracer number XX) |
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This allows to close the tracer budget when using KPP. |
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2) Change the diagnostic for KPP non-local term: |
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name: description: |
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KPPghat Nonlocal transport coefficient (s/m^2) |
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(correspond to KPP ghat field, from which the non-local |
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flux of tracer (T,S,pTr) is computed, as the product of |
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ghat , KPPdiffKz and surface flux.) |
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replaced by: |
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KPPghatK ratio of KPP non-local (salt) flux relative to surface-flux |
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(correspond to the product: KPP_ghat * KPPdiffKzS |
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which gives the fraction of the the surface flux of Salt |
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that KPP return as non local flux; also valid for any passive |
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tracer, but could be different for Temp., see comment below) |
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comments (from mitgcm-devel list): |
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I was also tempted to replace the KPPghat diagnostics |
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with something more useful which incorporates the KPPdiffKz: |
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Since it is the product KPPghat*KPPdiffKz which matters, |
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and given that short time variations of both (which have no |
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reason not to be correlated) can be significant, |
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the product of the 2 time-ave is very likely to be quiet |
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far from the time-ave of the product. |
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It has also the advantage of a simpler interpretation: |
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the product is just the fraction of the surface flux which is |
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treated as non local (no unit, instead of this funny s/m^2 |
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for KPPghat). |
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Then I would propose to just pick one KPPdiffKz (for instance, |
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KPPdiffKzS for salinity, since it's also used for Ptracers), |
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and have only 1 diag: "KPPghatK" for KPPghat*KPPdiffKzS (no unit). |
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For temperature (KPPghat*KPPdiffKzT), it's probably not too different |
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from the one computed for salinity (might be in fact a better |
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time-ave value that what we have now, for the reason above). |
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And to get a precise diagnostic of KPP-non-local effect |
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on temperature, there would be this new diagnostic directly from |
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kpp_transport_t.F (which can be used to close a Temp. budget). |
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================================================================ |
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Jun 21, 2009 |
Jun 21, 2009 |
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Some redundancies and relations for model diagnostics: |
Some redundancies and relations for model diagnostics: |
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