Meteorological excitation of interannual polar motion by the North Atlantic Oscillation
文献类型：期刊论文
| 作者 | Chao, BF; Zhou, YH |
| 刊名 | JOURNAL OF GEODYNAMICS
 |
| 出版日期 | 1999 |
| 卷号 | 27期号:1页码:61-73 |
| 英文摘要 | Variations of the atmospheric angular momentum (AAM) is responsible for almost all of the observed length-of-day (LOD) variation on time scales from several days to several years, and much of the observed polar motion on the intra-seasonal time scale. El Nino/Southern Oscillation (ENSO) and Quasi-Biennial Oscillation (QBO) have been singled out to successfully explain interannual LOD variations. However, excitation sources for the interannual polar motion, including the 14 month Chandler wobble, have not been positively identified. This paper studies the correlation of the observed polar motion Psi with the North Atlantic Oscillation (NAO), an interannual, mid-latitude, north-south seesaw in the atmosphere-ocean system. An index (NAOI) used as a proxy to measure the strength of NAO is compared with the observed interannual polar motion excitation during 1964-1994. Cross-correlation functions and coherence spectra demonstrate significant correlations between NAOI and Psi, especially in the x component as expected from NAO's location and general pattern. This constitutes: a positive identification of excitation of interannual polar motion by a meteorological system. Furthermore, our corresponding results with respect to ENSO strongly suggest that a combination of meteorological systems will better explain the observed interannual polar motion and perhaps the Chandler wobble. (C) 1998 Published by Elsevier Science Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Geochemistry & Geophysics |
| 研究领域[WOS] | Geochemistry & Geophysics |
| 关键词[WOS] | ATMOSPHERIC ANGULAR-MOMENTUM ; EL-NINO ; SOUTHERN OSCILLATION ; GEOPOTENTIAL HEIGHT ; CHANDLER-WOBBLE ; EARTHS WOBBLE ; HEMISPHERE ; LENGTH ; WINTER ; TEMPERATURES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000077211400004 |
| 源URL | [http://119.78.226.72/handle/331011/28259]  |
| 专题 | 上海天文台_天文地球动力学研究中心 |
| 作者单位 | 1.NASA, Goddard Space Flight Ctr, Space Geodesy Branch, Greenbelt, MD 20771 USA 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chao, BF,Zhou, YH. Meteorological excitation of interannual polar motion by the North Atlantic Oscillation[J]. JOURNAL OF GEODYNAMICS,1999,27(1):61-73. |
| APA | Chao, BF,&Zhou, YH.(1999).Meteorological excitation of interannual polar motion by the North Atlantic Oscillation.JOURNAL OF GEODYNAMICS,27(1),61-73. |
| MLA | Chao, BF,et al."Meteorological excitation of interannual polar motion by the North Atlantic Oscillation".JOURNAL OF GEODYNAMICS 27.1(1999):61-73. |
入库方式： OAI收割
来源：上海天文台
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