Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufm.p71a0455k&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #P71A-0455
Physics
1223 Ocean/Earth/Atmosphere Interactions (3339), 1239 Rotational Variations
Scientific paper
The interaction between the Earth and its fluid layers (namely the fluid core, the atmosphere and the ocean) is the major cause of the fluctuations of the Earth rotation. An analogy to Mars can be made since the two planets have many similarities. In this study, we review the interaction processes on Earth and use this knowledge to investigate Mars. It is known for more than one century that the Earth rotation is not a constant in time, and present fluctuations at various timescale. The knowledge of the angular momentum of the fluid allows to compute its effect on the Earth's rotation. A similar approach can be applied to Mars. The properties relevant to the effect of the fluid layers on the planet rotation can be deduced from the angular momentum budget equation. A priori, on Mars, the inertia and surface characteristic, core status, atmosphere, CO2 condensation/sublimation process and dust storms drive the interaction processes. In analogy to the case of Earth, the details of the interaction between Mars and its fluid layers will be studied in order to estimate the relative importance of the different components of the system.
de Viron Olivier
Dehant Véronique
Karatekin Ö.
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