Simulating Titan's Atmosphere With the Titan WRF General Circulation Model

Details Simulating Titan's Atmosphere With the Titan WRF General Circulation Model Simulating Titan's Atmosphere With the Titan WRF General Circulation Model

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufm.p43b..05n&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #P43B-05

Physics

0343 Planetary Atmospheres (5210, 5405, 5704), 3346 Planetary Meteorology (5445, 5739), 5405 Atmospheres (0343, 1060), 6281 Titan

Scientific paper

Titan WRF is a new three-dimensional model for the atmosphere of Titan, and is a globalized, `Titan'-ified version of the Earth-based, mesoscale `Weather Research and Forecasting' model. Titan WRF thus inherits all of the desirable features from the original model, including highly parallelized and accurate code (ideal for the long simulations required here) and the ability to place high resolution nests within lower resolution domains (thus study certain areas in high detail without the expense of running the entire model at this resolution). Unlike the original mesoscale version of WRF, however, Titan WRF does not require forcing from a separate model. Our eventual aim is to use Titan WRF to study the onset and evolution of methane clouds in Titan's atmosphere, although initially we are concerned with producing and validating the modeled atmosphere and its seasonal changes, first with a constant haze distribution (varying with height only) then with advection of radiatively-active haze within the atmosphere. We will present the first results for each season of a Titan year, as simulated by Titan WRF (with a constant haze distribution) following several years during which the model atmosphere is allowed to `spin up' due to contact and exchange of angular momentum with the surface. These results will include zonal mean winds (including a discussion of the amount of equatorial superrotation produced), temperatures and mass streamfunctions for different seasons. We will compare these with available observations, then discuss our future plans.

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