[MITgcm-devel] Re: Large & Yeager 2004

[Patrick Heimbach]

Dimitris,

an update on this.
Different people seem to understand different things
when they talk about "bulk formulae".
I undetstood the derivation of buoyancy and momentum fluxes
from atmos. state involving the parameterization of the neutral
transfer coefficients, their stability corrections and the like,
thus deriving, taux & tauy, sensible & latent heat fluxes, evaporation.
The treatment of radiation is somewhat separate, since completely
decoupled from these "bulk formulae".

However, in fact it seems that this minor detail might be
the only relevant part that distinguishes our current
exf implementation from the Large & Yeager 2004 recommendations,
i.e. they suggest ocean_emissivity to be set to 1,
whereas exf has a default of 0.97
(and bulkf_force a default of 0.985).

So I'll conduct another run with changed emissivity
(the 3% difference should in fact have a discernable impact).

-Patrick



On Dec 17, 2006, at 12:26 PM, Dimitris Menemenlis wrote:

> Patrick, thank you for info re bulk formulae.
> This is indeed very useful information.
> Dimitris

---
Dr Patrick Heimbach | heimbach at mit.edu | http://www.mit.edu/~heimbach
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