Non-tidal oceanic contribution to polar wobble estimated from two oceanic assimilation data sets

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	Non-tidal oceanic contribution to polar wobble estimated from two oceanic assimilation data sets
	Zhong, M. ; Yan, H. M. ; Wu, X. P. ; Duan, J. B. ; Zhu, Y. Z.
刊名	Journal of Geodynamics
	2006
期号	1-3 页码:147-154
中文摘要	Contributions of ocean bottom pressure and oceanic current to polar wobble are evaluated by using two oceanic data assimilation products. One product comes from Scripps Institution of Oceanography (ECCO), and the other is the Simple Ocean Data Assimilation (SODA) developed at University of Maryland. The results show that seasonal fluctuations in these two assimilated ocean angular momentum (OAM) time series agree better with each other along the Greenwich meridian than along the 90 degrees E meridian. Furthermore, annual OAM change for ECCO is much closer to non-atmospheric residual, than that for SODA. However, annual OAM change for SODA along the Greenwich meridian compares better than that for ECCO to non-atmospheric-hydrologic residual, in which annual and semi-annual signals of land hydrologic angular momentum (LHAM) of a climate model are considered. At the meantime, annual LHAM signals along the 90 degrees E meridian derived from the climate model and from the GRACE data are also compatible with each other. It is likely that ECCO overestimates the annual change along the 90 degrees E meridian according to the angular momentum conservation law in the Earth system. Consequently, the oceanic role in polar wobble should be further examined. (c) 2005 Elsevier Ltd. All rights reserved.
原文出处	://WOS:000235346600018
公开日期	2012-04-11
内容类型	期刊论文
源URL	[http://ir.whigg.ac.cn/handle/342008/3608]
专题	测量与地球物理研究所_其他_期刊论文
推荐引用方式 GB/T 7714	Zhong, M.,Yan, H. M.,Wu, X. P.,et al. Non-tidal oceanic contribution to polar wobble estimated from two oceanic assimilation data sets[J]. Journal of Geodynamics,2006(1-3):147-154.
APA	Zhong, M.,Yan, H. M.,Wu, X. P.,Duan, J. B.,&Zhu, Y. Z..(2006).Non-tidal oceanic contribution to polar wobble estimated from two oceanic assimilation data sets.Journal of Geodynamics(1-3),147-154.
MLA	Zhong, M.,et al."Non-tidal oceanic contribution to polar wobble estimated from two oceanic assimilation data sets".Journal of Geodynamics .1-3(2006):147-154.