由ERS-2和TOPEX卫星测高数据推算的海面高异常的主成分分析

EOF Analysis of Sea Level Anomaly Time Series Derived from ERS-2 and TOPEX Altimeter Data

利用1995～2003年间的TOPEx／POSEIDON和ERS-2卫星测高数据，尽量采用相同的改正模型对TOPEX和ERS-2卫星测高数据分别进行改正，然后由共线分析法分别推算了全球1°×1°的35d的海面高异常时间序列，并采用主成分分析法分别对这两个海面高异常时间序列进行了分析。

The collinear analysis is used to get the time series of sea level anomalies（SLA） by using ERS-2 and TOPEX/POSEIDON altimeter data from July 1995 to November 2003, respectively. To make the comparison between the two time series, the 10 d SLA time series derived from TOPEX/POSEIDON altimeter data is interpolated to 35 d time series. The correction models are harmonized between the two missions. Mean sea surface from 1996 to 1997 is subtracted during the collinear analysis.