Atmospheric quasi-14 month fluctuation and excitation of the Chandler wobble

Details Atmospheric quasi-14 month fluctuation and excitation of the Chandler wobble Atmospheric quasi-14 month fluctuation and excitation of the Chandler wobble

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ep%26s...55e..25a&link_type=abstract

Earth, Planets and Space, Volume 55, p. e25-e28.

Physics

4

Scientific paper

A quasi-14 month fluctuation in the atmospheric excitation function for the Earth's wobble is discussed by using the re-analysis data of the European Center for Medium-range Weather Forecast for the 14 years between 1980 and 1993. The spectrum of the atmospheric wind excitation function shows a striking peak near the 14-month period. As a result, the atmospheric (wind plus pressure) excitation function shows exactly the same power as that of the geodetic excitation function inferred from the observed wobble at the Chandler wobble frequency (about 14 months), suggesting that the atmosphere excited the Chandler wobble between 1980 and 1993. The wind fluctuation comes mostly from the tropospheric wind.

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