Excitation of the earth's polar motion due to mass variations in major hydrological reservoirs

Details Excitation of the earth's polar motion due to mass variations in major hydrological reservoirs Excitation of the earth's polar motion due to mass variations in major hydrological reservoirs

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....9313811c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Nov. 10, 1988, p. 13811-13819.

Mathematics

Logic

18

Earth Motion, Nutation, Reservoirs, Water Resources, Angular Momentum, Ground Water, Hydrology, Lakes

Scientific paper

The polar motion excitation caused by variations in major natural lakes, the impoundment in artificial reservoirs, and the depletion of a major groundwater aquifer is calculated. It is found that the annual water mass variation in natural lakes contributes a significant fraction in the total hydrological excitation of the annual wobble and that the hydrological reservoirs have been negligible in the Chandler wobble excitation. It is also shown that the contribution of hydrological reservoirs to the total secular polar drift has been negligible in the century due to fortuitous cancellation among reservoirs.

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