[MITgcm-support] more KPP blues, maybe related?

[Dimitris Menemenlis]

>> For SHORT_WAVE_HEATING input "Qsw" I use downward solar flux
>> (with oposite sign) which may be wrong (now I am almost sure it's
>> wrong).

Martin, if you are using a relatively recent version of the code, have a
look at definitions at beginning of FFIELDS.h (or exf_fields.h if you
are using pkg/exf).  For each input field there is a typical range of
values.

For global_ocean.90x40x15 experiment you need to use "net shortwave
radiation", which is different from "downward shortwave radiation", and
which is provided separately by NCEP.
 
Note that if you are using pkg/exf, then you can specify either net
(swflux) or downward (swdown) shortwave radiation, and the model will
convert as needed:

c--   Compute net from downward and downward from net longwave and
c     shortwave radiation, if needed.
c     lwflux = Stefan-Boltzman constant * emissivity * SST - lwdown
c     swflux = - ( 1 - albedo ) * swdown

Hope this helps.

One last thing, there is a small but finite chance that sign convention
for Qnet and Qsw may change for release 2.  So make sure to take a look
at FFIELDS.h and at exf_fields.h when you download release 2.

D.

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