Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6344
Title: Pacific warm pool excitation, earth rotation and El Niño southern oscillations
Authors: Yan, XH
Zhou, Y
Pan, J
Zheng, D
Fang, M
Liao, X
He, MX
Liu, WT
Ding, X 
Keywords: Earth rotation variations
Ocean sciences
Ocean interactions
Earth interactions
Atmosphere interactions
Hydrosphere interactions
Cryosphere interactions
Issue Date: Nov-2002
Publisher: John Wiley and Sons
Source: Geophysical research letters, Nov. 2002, v. 29, no. 21, 2031 How to cite?
Journal: Geophysical research letters 
Abstract: The interannual changes in the Earth's rotation rate, and hence in the length of day (LOD), are thought to be caused by the variation of the atmospheric angular momentum (AAM). However, there is still a considerable portion of the LOD variations that remain unexplained. Through analyzing the non-atmospheric LOD excitation contributed by the Western Pacific Warm Pool (WPWP) during the period of 1970–2000, the positive effects of the WPWP on the interannual LOD variation are found, although the scale of the warm pool is much smaller than that of the solid Earth. These effects are specifically intensified by the El Niño events, since more components of the LOD-AAM were accounted for by the warm pool excitation in the strong El Niño years. Changes in the Earth's rotation rate has attracted significant attention, not only because it is an important geodetic issue but also because it has significant value as a global measure of variations within the hydrosphere, atmosphere, cryosphere and solid Earth, and hence the global changes.
URI: http://hdl.handle.net/10397/6344
ISSN: 0094–8276 (print)
1944–8007 (online)
DOI: 10.1029/2002GL015685
Rights: Copyright 2002 by the American Geophysical Union.
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