2015年后钱德勒摆动减弱：与2011年质量异常有关

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-09-21 DOI:10.1029/2025GL116191

Taehwan Jeon, Ki-Weon Seo, Kookhyoun Youm, Jooyoung Eom, Daeha Lee, Jianli Chen, Clark R. Wilson

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引用次数: 0

摘要

2015年之后观测到的极地运动主要是由于钱德勒摆动分量前所未有的振幅减少而导致的年度摆动。这种变化可能是由于地球物理激励源抑制了433天周期的自由摆动。我们的实验表明，2011-2012年期间的激励变化是2015年后钱德勒摆动减弱的最重要贡献者。数值模式和卫星观测表明，钱德勒摆动的抑制主要是由2011-2012年大陆尺度空气和陆地水团再分布的变化驱动的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Diminished Chandler Wobble After 2015: Link to Mass Anomalies in 2011

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Diminished Chandler Wobble After 2015: Link to Mass Anomalies in 2011

Observed polar motion after 2015 is dominated by the annual wobble, due to unprecedented amplitude reduction of the Chandler Wobble component. This change is likely due to suppression of the 433-day-period free wobble by geophysical excitation sources. Our experiments show that excitation changes in the period 2011–2012 are the most significant contributors to the diminished Chandler Wobble after 2015. Numerical models and satellite observations suggest that the Chandler Wobble suppression was largely driven by the 2011–2012 changes in continental-scale air and terrestrial water mass redistribution.

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来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.