| Excitation of Annual Polar Motion by the Pacific,Atlantic and Indian Oceans |
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| 作者姓名： | Jin Ma Yong-Hong Zhou De-Chun Liao and Jian-Li Chen Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai Graduate School of Chinese Academy of Sciences Beijing Center for Space Research University of Texas at Austin Austin TX USA |
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| 作者单位： | Jin Ma1，2，Yong-Hong Zhou1，De-Chun Liao1 and Jian-Li Chen3 1 Shanghai Astronomical Observatory，Chinese Academy of Sciences，Shanghai 200030 2 Graduate School of Chinese Academy of Sciences，Beijing 100049 3 Center for Space Research，University of Texas at Austin，Austin TX 78712，USA |
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| 基金项目： | 国家自然科学基金;上海市科委资助项目 |
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| 摘 要： | The global oceans play important roles in exciting the annual polar motion besides the atmosphere. However,it is still unclear about how large the regional oceans contribute to the annual polar motion. We investigate systemically the contributions of the Pacific,Atlantic and Indian Oceans to the excitation of the annual polar motion,based on the output data of ocean current velocity field and ocean bottom pressure field from "Estimating the Circulation and Climate of the Ocean (ECCO)" ocean circulation model over the period 1993-2005. The result shows that due to its particular location and shape,the Atlantic Ocean makes a less significant contribution to the x-component of the annual polar motion excitation than the Pacific and Indian Oceans,while all these three oceans contribute to the y-component of the annual polar motion excitation to some extent.
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| 关 键 词： | annual polar motion — excitation — oceanic angular momentum function (OAMF) — atmospheric angular momentum function (AAMF) |
Excitation of Annual Polar Motion by the Pacific, Atlantic and Indian Oceans |
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| Jin Ma,,Yong-Hong Zhou,De-Chun Liao and Jian-Li Chen Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai Graduate School of Chinese Academy of Sciences,Beijing Center for Space Research,University of Texas at Austin,Austin TX ,USA.Excitation of Annual Polar Motion by the Pacific,Atlantic and Indian Oceans[J].Chinese Journal of Astronomy and Astrophysics,2007,7(6):831-838. |
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| Authors: | Jin Ma Yong-Hong Zhou De-Chun Liao Jian-Li Chen |
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| Abstract: | The global oceans play important roles in exciting the annual polar motion besides the atmosphere. However,it is still unclear about how large the regional oceans contribute to the annual polar motion. We investigate systemically the contributions of the Pacific,Atlantic and Indian Oceans to the excitation of the annual polar motion,based on the output data of ocean current velocity field and ocean bottom pressure field from "Estimating the Circulation and Climate of the Ocean (ECCO)" ocean circulation model over the period 1993-2005. The result shows that due to its particular location and shape,the Atlantic Ocean makes a less significant contribution to the x-component of the annual polar motion excitation than the Pacific and Indian Oceans,while all these three oceans contribute to the y-component of the annual polar motion excitation to some extent. |
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| Keywords: | annual polar motion-excitation-oceanic angular momentum function (OAMF)-atmospheric angular momentum function (AAMF) |
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