Atmospheric,hydrological and oceanic comprehensive contributions to seasonal polar wobble of Earth Rotation  

作　　者：钟敏 朱耀仲 高布锡 

出　　处：《Science China Mathematics》2002年第12期1620-1627,共8页中国科学：数学（英文版）

基　　金：this work. This work was supported by the National Natural Science Foundation of China (Grant Nos. 49904002 and 40074004).

摘　　要：The geophysical quantitative excitation on seasonal polar wobble of Earth Rotation has not been well achieved so far. The atmospheric, hydrologic and oceanic angular momentum variations are investigated from monthly values simulated by a coupled ocean-atmosphere general circulation model. The simulated equatorial AAM functions agree well with that from the JMA operational analysis in 90°E direction, but disagree along Greenwich meridian. As for the annual cycle, not only the hydrologic and oceanic excitations partly match the residuals between geodetic functions of polar wobble and JMA AAM functions, but also the combinations with NCEP and JMA analysis AAM functions are better than those estimated from NCAR-CSM1 climate model.The geophysical quantitative excitation on seasonal polar wobble of Earth Rotation has not been well achieved so far. The atmospheric, hydrologic and oceanic angular momentum variations are investigated from monthly values simulated by a coupled ocean-atmosphere general circulation model. The simulated equatorial AAM functions agree well with that from the JMA operational analysis in 90°:E direction, but disagree along Greenwich meridian. As for the annual cycle, not only the hydrologic and oceanic excitations partly match the residuals between geodetic functions of polar wobble and JMA AAM functions, but also the combinations with NCEP and JMA analysis AAM functions are better than those estimated from NCAR-CSM1 climate model.

关 键 词：POLAR wobble  ANGULAR momentum  Earth Rotation. 

分 类 号：P541[天文地球—构造地质学]