A seasonal budget of the earth's axial angular momentum

Details A seasonal budget of the earth's axial angular momentum A seasonal budget of the earth's axial angular momentum

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..631n&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, April 1990, p. 631-634.

Physics

11

Angular Momentum, Atmospheric Circulation, Earth Axis, Earth Hydrosphere, Earth Rotation, Annual Variations, Earth Core, Earth Mantle

Scientific paper

The seasonal variation of the earth's axial angular momentum budget is discussed with an error on the order of a few percent. The budget is based on the core-mantle decoupling (CMD) hypothesis. The atmospheric relative angular momentum changes due to zonal wind account for an additional 23 percent contribution over the annual budget. However, this is counterbalanced by the effects of the redistributions of air and water masses. About 16 percent is accounted for by the redistribution of air mass, and remained about 7 percent agrees with the contribution from surface water storage estimate on continents by Chao and O'Connor (1988). These facts demonstrate a confirmation of the CMD hypothesis on time scale of a year. At the semiannual period, however, there still is a shortage of about 6 percent in atmospheric and hydrospheric contributions to the budget.

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