[MITgcm-support] variable gravity for hydrostatic, r*, atmospheric model

Angela Zalucha azalucha at seti.org
Wed May 27 14:18:44 EDT 2015

Hello, I will make my yearly plea:

Could someone modify the model such that gravity varies as a function of 
height, i.e. g(r)=GM/r^2, for the hydrostatic, r-star, atmospheric model 
configuration?  I use the MIT GCM to model Pluto, which has a solid 
surface radius of 1180 km (give or take 50 km), and take the model up to 
600 km altitude.  The approximation that g = surface gravitational 
constant at that height is a very bad approximation.  Now I am taking 
the model up to 2000 km altitude (note this is still below the exobase 
and the continuum fluid approximation still applies), and this 
approximation has become downright ridiculous.


Angela Zalucha, Ph.D.
Research Scientist
Search for Extraterrestrial Intelligence (SETI) Institute
+1 (617) 894-2937

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