| AN ATMOSPHERIC MOTION EQUATION BUILT ON THE CONSERVATIVE RELATIONSHIP OF THE ANGULAR MOMENTUM EXCHANGE BETWEEN THE SOLID EARTH AND THE ATMOSPHERE ON SEASONAL-ANNUAL TIMESCALE |
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| 作者姓名： | 钱维宏 游性恬 丑纪范 |
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| 作者单位： | Department of Geophysics Peking University，Beijing 100871，Beijing Meteorological College，Beijing 100081，Beijing Meteorological College，Beijing 100081 |
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| 基金项目： | This work is supported by the National Natural Science Foundation of China(No.493752477)，the Doctorial Program Foundation of the Institution of Higher Education. |
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| 摘 要： | Within the seasonal-annual timeseale,there exists an angular momentum conservative exchange relationship be-tween the solid earth and the atmosphere,and their angular momentum exchange not only can cause variations inlength-of-day(LOD)but also can express anomalies in atmospheric general circulation.Therefore,their angular mo-mentum exchange mechanism should be introduced into the general circulation model.Considering the angular momentum anomalous exchange caused by the air-earth interface friction effect,awhole-layer atmospheric motion equation is derived in this paper including the earth spin anomalous friction forceparameterized by using the change in the earth rotation rate.Through analysing the equation,it shows that the magni-tude of the earth spin anomalous friction force is the same as that of Coriolis force on seasonal-annual timescale.
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AN ATMOSPHERIC MOTION EQUATION BUILT ON THE CONSERVATIVE RELATIONSHIP OF THE ANGULAR MOMENTUM EXCHANGE BETWEEN THE SOLID EARTH AND THE ATMOSPHERE ON SEASONAL-ANNUAL TIMESCALE |
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| Qian Weihong.AN ATMOSPHERIC MOTION EQUATION BUILT ON THE CONSERVATIVE RELATIONSHIP OF THE ANGULAR MOMENTUM EXCHANGE BETWEEN THE SOLID EARTH AND THE ATMOSPHERE ON SEASONAL-ANNUAL TIMESCALE[J].Acta Meteorologica Sinica,1995(2). |
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| Authors: | Qian Weihong |
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| Affiliation: | Qian Weihong Department of Geophysics,Peking University,Beijing 100871
You Xingtian Chou Jifan Beijing Meteorological College,Beijing 100081 |
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| Abstract: | Within the seasonal-annual timeseale,there exists an angular momentum conservative exchange relationship be- tween the solid earth and the atmosphere,and their angular momentum exchange not only can cause variations in length-of-day(LOD)but also can express anomalies in atmospheric general circulation.Therefore,their angular mo- mentum exchange mechanism should be introduced into the general circulation model. Considering the angular momentum anomalous exchange caused by the air-earth interface friction effect,a whole-layer atmospheric motion equation is derived in this paper including the earth spin anomalous friction force parameterized by using the change in the earth rotation rate.Through analysing the equation,it shows that the magni- tude of the earth spin anomalous friction force is the same as that of Coriolis force on seasonal-annual timescale. |
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| Keywords: | angular momentum conservation changes in the earth rotation rate friction force atmospheric motion equation |
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