水分布激发与周年极移  

THE EXCITATION OF WATER STORAGE DISTRIBUTION AND THE ANNUAL WOBBLE

作　　者：雷小平[1] 高布锡[1] 

机构地区：[1]中国科学院测量与地球物理研究所,武汉430077

出　　处：《天文学报》1992年第1期61-66,共6页Acta Astronomica Sinica

摘　　要：本文作者利用全球近300个气象台站的月降水量及月均温度资料,联合国教科文组织(UNESCO)给出的全球陆地径流系数,Lamb和Van Hylkama求出的陆地蒸发量数据,求得从1979年到1989年逐月的水分布激发函数,并与周年极移作了对比研究。计算结果表明:水分布变化对周年极移有较大贡献,可以很好地用大气及水分布变化引起的激发解释周年极移运动。Using the Monthly mean values of precipitation and temperature taken from about 300 meteorological stations all over the world, the run-off coefficients for all the continents com- piled by UNESCO and evapotranspiration based on the thesis of Lamb(1972) and that of Van Hylkama(1970), the seasonal variations of the global water storage have been estimated. Then the excitation functions of water storage from 1979 to 1989 have been calculated. The results show that the seasonal variations of the distribution of global water storage have a significant contri- bution to the annual wobble, and the annual wobble can be explained very well using the exci- tation of atmosphere and water storage.

关 键 词：水分布 变化 周年 地极 移动 

分 类 号：P127.4[天文地球—天体测量]