Statistics – Methodology
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.3905f&link_type=abstract
American Astronomical Society, DPS meeting #41, #39.05
Statistics
Methodology
Scientific paper
Recent Cassini and groundbased observations provide strong evidence that temperature and constituent distributions in the stratosphere of Saturn are controlled by a complex interaction between photochemical, radiative, and dynamical processes. Knowledge of the mass transport circulation in the upper troposphere and stratosphere is therefore indispensable for a full and correct interpretation of spatial maps of trace species concentrations. In this work, a three-dimensional outer-planet general circulation model (OPGCM) is used to compute the thermal structure and dynamics in Saturn's troposphere and stratosphere. The model includes a rigorous treatment of radiative transfer and diabatic heating. The effective zonal-mean advective meridional circulation and eddy transport coefficients required by zonally symmetric two-dimensional models are derived from OPGCM tracer experiments. The OPGCM also allows investigation of the relationship between observed temporal and spatial variations of temperatures, winds, and composition in terms of coupling between photochemistry, radiation, and dynamics. The overall methodology and some preliminary results will be presented at the meeting. This work is supported by the NASA Planetary Atmospheres Program.
Friedson Andrew James
Moses Julianne I.
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