Tests on the validity of atmospheric torques on Earth computed from atmospheric model outputs

Details Tests on the validity of atmospheric torques on Earth computed from atmospheric model outputs Tests on the validity of atmospheric torques on Earth computed from atmospheric model outputs

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgrb..108.2068d&link_type=abstract

Journal of Geophysical Research (Solid Earth), Volume 108, Issue B2, pp. ETG 3-1, CiteID 2068, DOI 10.1029/2001JB001196

Physics

1

Geodesy And Gravity: Planetary Geodesy And Gravity (5420, 5714, 6019), Geodesy And Gravity: Rotational Variations, Geodesy And Gravity: Ocean/Earth/Atmosphere Interactions (3339)

Scientific paper

The effect of the atmosphere on the Earth rotation is usually computed using the angular momentum budget equation. In particular, the interaction torque between the solid Earth/ocean and the atmosphere can be computed from the output of global circulation models. This torque is composed of three parts: a mountain torque due to the pressure action on the topography, a gravitational torque due to the interaction between the mass inside the solid Earth and inside the atmosphere, and a friction torque. The purpose of the paper is to test the torque computed from the output of different atmospheric global circulation models (GEOS-1, National Centers for Environmental Protection reanalysis, and ERA-15) in order to see to what extent they are reliable in the frame of Earth rotation studies. The test has been performed by comparing each part of the torque computed from the different models, as well as by verifying of the angular momentum budget equation for the atmosphere.

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