DIURNAL/SEMIDIURNAL OCEANIC TIDAL ANGULAR-MOMENTUM - TOPEX/POSEIDON MODELS IN COMPARISON WITH EARTHS ROTATION RATE

被引：13

作者：

CHAO, BF

RAY, RD

EGBERT, GD

机构：

[1] NASA,GODDARD SPACE FLIGHT CTR,HUGHES STX,GREENBELT,MD 20771

[2] OREGON STATE UNIV,COLL OCEAN & ATMOSPHER SCI,CORVALLIS,OR 97331

来源：

GEOPHYSICAL RESEARCH LETTERS | 1995年 / 22卷 / 15期

关键词：

D O I：

10.1029/95GL01788

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The oceanic tidal angular momentum (OTAM) has been demonstrated to be the primary cause for the diurnal and semidiurnal variations in the Earth's rotational rate, or Delta UT1. Three ocean tide models derived from the Topex/Poseidon altimetry mission are employed to yield predictions of Delta UT1 for eight major dirnal/semidiurnal tides. The predictions are compared with geodetic determinations of Delta UT1 from the very-long-baseline interferometry data both for long-term observations acid during intensive campaigns, The agreement is good, with discrepancies typically within 2-3 mu s. Systematic discrepancies observed for the well-determined M(2) tide clearly reveal the contribution of the Earth's spin libration.

引用

页码：1993 / 1996

页数：4

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