Comparative Studies to Be a Theme for the Joint Assembly in Montreal

Details Comparative Studies to Be a Theme for the Joint Assembly in Montreal Comparative Studies to Be a Theme for the Joint Assembly in Montreal

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004eostr..85...48m&link_type=abstract

EOS Transactions, AGU, Volume 85, Issue 5, p. 48-48

Physics

Atmospheric Composition And Structure: General Or Miscellaneous, Ionosphere: General Or Miscellaneous, Magnetospheric Physics: General Or Miscellaneous

Scientific paper

To have a truly global view of geophysical systems, it helps to have a few globes to view. Our solar system offers a rich set of case studies on how environmental systems form and evolve. The temperature structures of atmospheres, their circulation patterns, and their optical emissions are governed by the same basic laws of physics and photochemistry, but with constituents and solar flux input values that vary dramatically over the span of the planets. The escape of gases from the Earth and those planets and moons with dense atmospheres involve processes rather different from those associated with sputtered gases from the far more abundant regoliths of rock and ice. The origins and dynamics of plasmas and magnetic fields, their interactions with the flowing solar wind and/or rapidly rotating planetary fields, and episodic ``space weather'' events provide additional areas of common science in remarkably different settings. The Earth and its companions thus comprise the only known set of experiments in planetary formation for which there is actual data to validate and to challenge theory and computer models. While observations are abundant for Earth, and beyond the ``discovery mode'' set for many of the planets and moons, there remain crucial gaps in our understanding and formidable problems to solve at each of these worlds. Coupling processes, perhaps most of all, from regions below and above the environmental systems being studied are at the forefront of current work, drawing attention to the need for advanced observational capabilities and breakthroughs in computer simulation techniques.

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