Excitation of non-atmospheric polar motion by the migration of the Pacific Warm Pool

	Excitation of non-atmospheric polar motion by the migration of the Pacific Warm Pool
	Zhou, YH ; Yan, XH ; Ding, XL ; Liao, XH ; Zheng, DW ; Liu, WT ; Pan, JY ; Fang, MQ ; He, MX
刊名	JOURNAL OF GEODESY
	2004-09-01
卷号	78 期号:1-2 页码:109-113
关键词	polar motion Western Pacific Warm Pool excitation
英文摘要	Changes in the annual variation of the Earth's polar motion are found to be largely caused by the variation of the atmospheric angular momentum (AAM). Recent simulation results of oceanic general circulation models further suggest global oceanic effects on the annual polar motion in addition to the atmosphere. In comparison with previous model studies of global oceanic effects, this research particularly singles out a large-scale ocean anomaly and investigates its effect on the annual polar motion, determined from satellite observations of the movement of the Western Pacific Warm Pool (WPWP). Although the scale of the warm pool is much smaller than that of the solid Earth, analysis of the non-atmospheric polar motion excitation has shown that the WPWP contributes non-negligibly to the annual polar motion. The analysis consists of over 30 years of WPWP data (1970-2000) and shows values of polar motion excitation for the x-component of (2.5 mas, -79degrees) and for the gamma-component of (0.6 mas, 173degrees). Comparison of this result with the total geodetic non-atmospheric polar motion excitation of (10.3 mas, 59degrees) for the x-component and (10.6 mas, 62degrees) for the gamma-component shows the significance of the WPWP. Changes in the Earth's polar motion have 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 global changes.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Geochemistry & Geophysics ; Remote Sensing
研究领域[WOS]	Geochemistry & Geophysics ; Remote Sensing
关键词[WOS]	EL-NINO ; ANGULAR-MOMENTUM ; EARTH ROTATION ; LENGTH ; OSCILLATION ; SIGNALS ; WOBBLE ; VARIABILITIES ; EVENTS
收录类别	SCI
语种	英语
WOS记录号	WOS:000224097000014
公开日期	2010-07-30
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/10474]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Univ Delaware, Grad Coll Marine Studies, Newark, DE 19716 USA 3.Hong Kong Polytech Univ, Dept Land Surveying & Geoinformat, Hong Kong, Hong Kong, Peoples R China 4.CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA 5.Ocean Univ China, Ocean Remote Sensing Inst, Qingdao, Peoples R China 6.Chinese Acad Sci, United Ctr Astrogeodynam Res, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Zhou, YH,Yan, XH,Ding, XL,et al. Excitation of non-atmospheric polar motion by the migration of the Pacific Warm Pool[J]. JOURNAL OF GEODESY,2004,78(1-2):109-113.
APA	Zhou, YH.,Yan, XH.,Ding, XL.,Liao, XH.,Zheng, DW.,...&He, MX.(2004).Excitation of non-atmospheric polar motion by the migration of the Pacific Warm Pool.JOURNAL OF GEODESY,78(1-2),109-113.
MLA	Zhou, YH,et al."Excitation of non-atmospheric polar motion by the migration of the Pacific Warm Pool".JOURNAL OF GEODESY 78.1-2(2004):109-113.