[RegCNET] About idirect in RegCM3 -aerosol

[Prodromos Zanis]

Dear colleagues

I would be glad if someone would give me a few clarifications for idirect.
When idirect=0 then there is no climate feedback from aeresols
and when idirect=2 then we have climate feeback from aeresols.
What about when idirect=1? What is the difference between idirect 1 and 2.
Is it like that if someone wants to look the climate feedback from
aerosols (e.g. on surface Temperature) then should take the diffrence of a
simulation with idirect=2 from the simulation with idirect=1.

Also I have another question for the radiative forcing.
In CHEM output files there are the parameters acstoarf0 for TOA (Top of
the Atmosphere) radiative forcing and acstsrrf0 for SRF (surface)
radiative forcing.
In what sense are these two parameters defined?

I look forward for your feedback

With kind regards
Prodromos

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Dr. Prodromos Zanis
Centre for Atmospheric Physics and Climatology
Academy of Athens
3rd September 131, Athens 11251, Greece
Tel. +30 210 8832048
Fax: +30 210 8832048
e-mail: pzanis at geol.uoa.gr
Web address: http://users.auth.gr/~zanis/
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