[MITgcm-support] External orbiting forces!

[taimaz.bahadory]

Thanks for reply Angela;
I'm currently using the AIM package. Isn't there any similar add-on for it?
Obliquity, eccentricity, and
precession<http://en.wikipedia.org/wiki/Precession> are
all three types of Earth's movement/rotation variations over a long period
of time (as you may know)
Anyway, I will take a look at the Fizhi package is AIM doesn't support this
phenomena

Thanks again



On Fri, Sep 14, 2012 at 1:33 PM, Angela Zalucha <angela at boulder.swri.edu>wrote:

> Taimaz:
>
> If you are using the fizhi package,
> subroutine ASTRO in fizhi_clockstuff.F will calculate the solar zenith
> angle as a function of obliquity and eccentricity (these constants are set
> in getcon.F).  But note that they are treated as constants, so you would
> need to modify the code if they are changing with time (I assume that's
> what you mean by precession).
>
>
> I also have a subroutine to calculate solar zenith angle as a function of
> obliquity, eccentricity, and ecliptic longitude as part of my planetary
> model (not part of the public distribution).  The equation for solar zenith
> angle may be found in e.g. Peixoto and Oort, "Physics of Climate" textbook.
>
>
> Angela
>
>
>
>
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> Angela Zalucha, Ph.D.
> A. M. Zalucha Consulting
>
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>
> On Fri, 14 Sep 2012, taimaz.bahadory wrote:
>
>  Hello everybody;
>> Does MITgcm support orbital parameters, such as obliquity, precession,
>> and eccentricity? I want to run a climate model
>> for, say thousands of years, in which the orbital specifications of Earth
>> will change indeed. Is MITgcm a suitable
>> package for such a case?
>> Thanks
>>
>>
>>
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