Oceanic effects on polar motion determined from an ocean model and satellite altimetry: 1993-2001
Oceanic effects on polar motion determined from an ocean model and satellite altimetry: 1993-2001
复制标题
根据海洋模型和卫星测高确定的海洋对极移的影响:1993-2001
DOI:
10.1029/2003jb002664
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发表时间:
2004-02
期刊:
影响因子:
--
通讯作者:
Tapley BD
中科院分区:
文献类型:
--
作者:
Chen JL;Wilson CR;Hu XG;Zhou YH;Tapley BD
Mass redistribution and motion in the oceans are major driving forces of geodetic variations, including polar motion, length of day, geocenter, and gravity field changes. We examine oceanic contribution to polar motion using estimates from a data‐assimilating ocean general circulation model and satellite radar altimeter observations. The data include model estimates of variations in oceanic mass (OBP) and meridional and zonal velocities. Sea level anomalies from TOPEX/Poseidon (T/P) satellite altimeter measurements and steric sea surface height changes deduced from the model are also used to estimate OBP effects. Estimated oceanic contributions from both the model and T/P show considerably better agreement with polar motion observations compared with results from previous studies. The improvement is particularly significant at intraseasonal timescales. Both OBP and ocean current variations provide important contributions to polar motion. At intraseasonal timescales the oceans appear to be a dominant contributor to residual polar motion not accounted for by the atmosphere. The oceans also play an important role in seasonal excitation. Combined OBP and ocean current contributions explain much of the residual semiannual variability.
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影响因子:
5.2
作者:
J. Dickey;S. Marcus;C. M. Johns;R. Hide;S. Thompson
通讯作者:
J. Dickey;S. Marcus;C. M. Johns;R. Hide;S. Thompson
影响因子:
5.2
作者:
J. L. Chen;C. Wilson;X. G. Hu;B. Tapley
通讯作者:
J. L. Chen;C. Wilson;X. G. Hu;B. Tapley
DOI:
--
发表时间:
2000-11
期刊:
--
影响因子:
--
作者:
I. Fukumori;T. Lee;D. Menemnlis;L. Fu;B. Cheng;B. Tang;Z. Xing;R. Giering
通讯作者:
I. Fukumori;T. Lee;D. Menemnlis;L. Fu;B. Cheng;B. Tang;Z. Xing;R. Giering
影响因子:
5.2
作者:
R. Ponte;A. H. Ali
通讯作者:
R. Ponte;A. H. Ali
DOI:
--
发表时间:
2013-02
期刊:
--
影响因子:
--
作者:
J. T. Ratcliff;R. Gross
通讯作者:
J. T. Ratcliff;R. Gross