Relationship between polar motion and key hydrological elements at multiple scales
文献类型：期刊论文
| 作者 | Deng, Shanshan1,2; Liu, Suxia1,2,3; Mo, Xingguo1,2,3; Peng, Gongbing1 |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2022-02-23 |
| 页码 | 17 |
| 关键词 | Polar motion Hydrological changes Polar motion deformation Excitation Function |
| ISSN号 | 1674-7313 |
| DOI | 10.1007/s11430-021-9877-9 |
| 通讯作者 | Liu, Suxia(liusx@igsnrr.ac.cn) |
| 英文摘要 | Changes in the elements of the Earth system are closely related. Finding the key factors linked with hydrological changes is significant for in-depth analysis of hydrological changes. This study chooses polar motion, which is the movement of the Earth's rotational axis relative to its crust, as a key factor in the investigation of the physical processes of its interaction with several hydrological elements. First, the statistical relationships between polar motion and multi-hydrological elements (i.e., precipitation, evaporation, runoff, and terrestrial water storage) are investigated, using trend analysis, mutation analysis, cycle analysis, and correlation analysis methods, from basinal to global and from intra-annual to inter-annual scales. Second, their interactions are explored. The study quantifies the effect of hydrological changes on polar motion using the excitation function. It explores the effect of polar motion on hydrological changes based on the theory of equilibrium tides and atmospheric dynamics. The results show that they are significantly correlated and abruptly changed at a similar time. First, regional to global hydrological changes can significantly excite polar motion. From April 2002 to June 2020, the global terrestrial water storage decreased significantly (by approximately -4.68 mm yr(-1)), which significantly drove polar motion towards the direction of the Greenwich Meridian (by approximately 4.32 mas yr(-1)). Changes in regional terrestrial water storage also contributed significantly to directional changes in polar motion around 2005 and 2012. Second, polar motion can perturb the Earth's centrifugal force system and generate equilibrium tides, and thus further cause changes in sea-level pressure, wind, and water vapor transport. Results show that polar motion-induced water vapor flux divergences correlate significantly with actual precipitation and terrestrial water storage changes in the Yangtze River and the Pearl River basins. Their correlations are also significant when trends are removed, and the polar motion-induced changes are 4 to 14 months earlier. This study further demonstrates the relationship between polar motion and hydrological changes and helps to understand the related factors of hydrological changes in other Earth systems. |
| WOS关键词 | GROUNDWATER DEPLETION ; 20TH-CENTURY ; PATTERNS ; GRACE ; TIDE |
| 资助项目 | National Key Research and Development Program of China[2018YFE0106500] ; National Key Research and Development Program of China[2017YFA0603702] ; National Program on Key Basic Research Project of China[2012CB957802] ; Danida Fellowship Centre EOForChina project[18-M01-DTU] ; ChinaWaterSense project[8087-00002B] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000761729500001 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Key Research and Development Program of China ; National Program on Key Basic Research Project of China ; Danida Fellowship Centre EOForChina project ; ChinaWaterSense project |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/171403]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Liu, Suxia |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Deng, Shanshan,Liu, Suxia,Mo, Xingguo,et al. Relationship between polar motion and key hydrological elements at multiple scales[J]. SCIENCE CHINA-EARTH SCIENCES,2022:17. |
| APA | Deng, Shanshan,Liu, Suxia,Mo, Xingguo,&Peng, Gongbing.(2022).Relationship between polar motion and key hydrological elements at multiple scales.SCIENCE CHINA-EARTH SCIENCES,17. |
| MLA | Deng, Shanshan,et al."Relationship between polar motion and key hydrological elements at multiple scales".SCIENCE CHINA-EARTH SCIENCES (2022):17. |
入库方式： OAI收割
来源：地理科学与资源研究所
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