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通过考察全球海洋环流数值模型以及TOPEX Poseidon海洋测高数据 ,得到结论 :1 997 1 998年后的部分J2异常变化可能来自海洋环流变化导致的质量重新分布 ,具体地说是太平洋环流变化导致的从高纬地区向低纬地区的质量迁移 .本工作表明来自于海洋内部温盐效应的变化对J2 异常变化有重要贡献 ,进一步证实了卫星激光测距资料所得结果的可靠性
By examining the global ocean circulation numerical model and the TOPEX Poseidon ocean altimetry data, it is concluded that some of the anomalous changes in J2 after 1997-1998 may result from the mass redistribution caused by changes in the ocean circulation, specifically from the changes in the circulation of the Pacific Ocean High latitude region to low latitude region.This work shows that the change of temperature and salinity effect from inside the ocean has an important contribution to the anomalous change of J2 and further confirms the reliability of the results obtained from satellite laser ranging data