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New Astronomy in the COLA Atmospheric General Circulation Model OceanDocs
Marx, L..
Two new astronomy packages, Naval Observatory Vector Astrometry Subroutines/Jet Propulsion Laboratory (NOVAS/JPL) and Berger (1978), have been installed in the Center for Ocean-Land-Atmosphere Studies (COLA) atmospheric general circulation model (AGCM). These provide much greater accuracy and flexibility in representing the Sun’s position as seen by the Earth’s atmosphere in both realistic settings as well as those involving paleoclimate simulations and constrained astronomical parameter experiments. Their computational efficiency provide low cost for any period of time being simulated. Details and implementation are discussed. The errors are also reviewed and comparisons are made with the original Spencer (1971) astronomy calculation. The accuracy and...
Tipo: Report Palavras-chave: Atmosphere-ocean system.
Ano: 2001 URL: http://hdl.handle.net/1834/498
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New Calculation of Saturation Specific Humidity and Saturation Vapor Pressure in the COLA Atmospheric General Circulation Model OceanDocs
Marx, L..
A new method of computing the saturation specific humidity, qs, and saturation vapor pressure, es, is presented. This has been recently implemented in the Center for Ocean-Land- Atmosphere Studies (COLA) atmospheric general circulation model (AGCM). The new method offers high accuracy extending beyond the observed atmospheric temperature domain and yet is computationally competitive with most other methods used for this calculation. In addition a corresponding continuous function for the derivative of es with respect to temperature is also given. An inverse function to es is available as well. Included are small corrections to es to assure high accuracy. The design of the implementation permits the user to obtain whatever level of accuracy and detail might...
Tipo: Working Paper Palavras-chave: Atmospheric circulation.
Ano: 2002 URL: http://hdl.handle.net/1834/504
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