论文--中国科学院地理科学与资源研究所

论文

论文题目：	Polar Drift in the 1990s Explained by Terrestrial Water Storage Changes
第一作者：	Deng S., Liu S., Mo X., Jiang L., Bauer-Gottwein P.
联系作者：
发表年度：	2021
摘　　要：
英文摘要：	Secular polar drift underwent a directional change in the 1990s, but the underlying mechanism remains unclear. In this study, polar motion observations are compared with geophysical excitations from the atmosphere, oceans, solid Earth, and terrestrial water storage (TWS) during the period of 1981-2020 to determine major drivers. When contributions from the atmosphere, oceans, and solid Earth are removed, the residual dominates the change in the 1990s. The contribution of TWS to the residual is quantified by comparing the hydrological excitations from modeled TWS changes in two different scenarios. One scenario assumes that the TWS change is stationary over the entire study period, and another scenario corrects the stationary result with actual glacier mass change. The accelerated ice melting over major glacial areas drives the polar drift toward 26 degrees E for 3.28 mas/yr after the 1990s. The findings offer a clue for studying past climate-driven polar motion.
刊物名称：	GEOPHYSICAL RESEARCH LETTERS
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论文类别：	SCI