High-frequency excitation of earth rotation parameters by the atmosphere

Details High-frequency excitation of earth rotation parameters by the atmosphere High-frequency excitation of earth rotation parameters by the atmosphere

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996cha%26a..20q.507x&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 20, Issue 4, p. 507-507.

Astronomy and Astrophysics

Astrophysics

Scientific paper

Using the ERP series from space geodetic measurement in the period 1983-1992 and the AAM series from global meteorological data we analyzed the high-frequency (timescales below one month) excitation of LOD and polar drift by the atmosphere. We found: 1) The atmosphere has an effect on the estimated value of the high-frequency tides of the LOD component, whereas the variation of the tidal distortion parameter k/c is caused by non-atmospheric factors. 2) The atmosphere can account for most part of the non-tidal variation of LOD below 30 d. 3) The high-frequency variations below 30 d of the polar drift are mainly excited by the atmosphere. The atmosphere can contribute as much as 70% to the 27 d-variation in the x-component.

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