| 利用TOPEX/Poseidon卫星测高资料监测全球海平面变化 |
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| 引用本文： | 董晓军,黄珹.利用TOPEX/Poseidon卫星测高资料监测全球海平面变化[J].测绘学报,2000,29(3):266-272. |
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| 作者姓名： | 董晓军 黄珹 |
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| 作者单位： | 中国科学院,上海天文台,上海,200030;中国科学院,国家天文观测中心,北京,100101 |
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| 基金项目： | 国家自然科学基金;19833030,49634140; |
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| 摘 要： | 本文利用１９９３年１月至１９９９年５月的ＴＯＰＥＸ／Ｐｏｓｅｉｄｏｎ卫星测高数据计算了全球海平变化。海平面模型误差和不恰当的加权方法都会影响全球海平面序列的周年变化，潮汐模型误差对于季节性变化有明显的影响。利用两个高度计算的海平面变化存在周年变化存在明显的差异，利用ＴＯＰＥＸ高度计和Ｐｏｓｅｉｄｏｎ高度计得到的该时段全球平均海平面的变化率分别为２．０ｍｍ／ａ和－０．５ｍｍ／ａ。与南方涛动指数的比较
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| 关 键 词： | TOPEX／Poseidon卫星 海平面 卫星测高 |
Monitoring Global Mean Sea Level Variation with TOPEX/Poseidon Altimetry |
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| DONG Xiao-jun,HUANG Cheng.Monitoring Global Mean Sea Level Variation with TOPEX/Poseidon Altimetry[J].Acta Geodaetica et Cartographica Sinica,2000,29(3):266-272. |
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| Authors: | DONG Xiao-jun HUANG Cheng |
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| Institution: | DONG Xiao jun 1,2,HUANG Cheng 1,2 |
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| Abstract: | Variation of the global mean sea level was extracted with TOPEX/Poseidon altimeter data from January 1993 to May 1999. It is shown that both the improper weighting and error in mean sea level model induce errors in the annual variation of global mean sea level. The error of current ocean tide model affected global mean sea level in the periods of about 60 and 90 days. The significant difference was found between the global mean sea level from TOPEX altimeter and that from Poseidon altimeter, suggesting that TOPEX/Poseidon altimeters need further calibration. The rate of change of global mean sea level derived from TOPEX altimeter and Poseidon altimeter during this period is 2.0mm/yr and -0.5 mm/yr respectively. The correlation between global mean sea level variation and Southern Oscillation Index (SOI) shows that the ENSO event is an possible explaination for the intra-annual variation in global mean sea level. |
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| Keywords: | TOPEX/Poseidon satellite sea level change ENSO event satellite altimetry |
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