[MITgcm-support] evaporation fields: supply or estimate?

[Dimitris Menemenlis]

Jill,

> Does anyone have an opinion/recommendation on whether it's better to supply 
> reanalysis evaporation fields (along with precip/humid/wind etc etc), so that
>  the mitgcm ocean surface temperature is not consistent with the evaporation,
>  but the forcing fields are all consistent with each other, or to allow
> mitgcm to calculate the evaporation based on external humidity and insolation
> fields plus it's own ocean surface temperature?

has anyone replied to this.  I do the latter but have no evidence whether it is
better or worse than the former.

> Plus, if anyone else is using ERA-40 forcing data (specifically evaporation,
> precipitation and humidity 6 hourly fields) and has a 100% sure way of
> converting their 'metres of water accumulated over the period of the
> forecast' into metres/second, i'd be really grateful to hear how it's done-
> whatever i try i get values 1 or 2 orders of magnitude higher than the mitgcm
> exf_check_range expected ranges recommends.

I am attaching data.exf file that I used when I run with ERA40 and a read.me 
file that describes source of data.  As far as I can tell no unit conversions 
were required, except for change of sign for lwdown and swdown and a C to K 
conversion for air temperature.

If helpful to you, I can make the input files that I used available on an ftp 
server.

Cheers, Dimitris

-- 
Dimitris Menemenlis <menemenlis at jpl.nasa.gov>
Jet Propulsion Lab, California Institute of Technology
MS 300-323, 4800 Oak Grove Dr, Pasadena CA 91109-8099
tel: 818-354-1656;  fax: 818-393-6720
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