中文摘要：

利用TOPEX/Poseidon卫星十年（1992—2002）监测博斯腾湖水位变化的地球物理记录（GDR）数据,经过数据的地球物理改正、编辑、约化和滤波后,分别采用小波分析和傅里叶分析得到了博斯腾湖水位变化的平均周期为1034d、363d、182d和47d。季节性变化是湖泊水位变化的主项,利用最小二乘法得到周年振幅为0.7196m,半年振幅为0.5322m,因此季节性变化的主周期是周年,次周期是半年。博斯腾湖水位变化趋势为＋0.2012m/a,说明博斯腾湖水位在升高。由博斯腾湖月水位变化的时间序列与NINO3SST进行相关性分析,发现延迟6个月的博斯腾湖月水位变化序列与NINO3SST数据相关性最大（-0.2784）,表明ElNio对我国西部降水的影响具有一定的滞后性。

英文摘要：

Satellite altimetry is an important technique to monitor the lake level variations.About 10 years of TOPEX/Poseidon altimetric data which have been corrected,edited,reduced and filtered,have been used to compute the time series of lake levels at Bosten Lake in the west China.The time series is analyzed with the Fourier transform and the wavelet transformation,respectively.The mean periods are 1 034 d,363 d,182 d and 47 d.The seasonal variation is the main component,and the amplitudes of the annual and semiannual are 0.719 6 m and 0.532 2 m respectively based on the least square approach.So the annual is the dominant period of the seasonal variation,and the semiannual is the minor period.The trend of the water level variation of Bosten Lake is 0.201 2 m/a,which indicates the water level of Bosten Lake is rising under the effect of global warming.Then the correlation between the NINO3 SST and the water level variations of Bosten Lake is analyzed.The correlation is maximal（-0.278 4）when NINO3 SST has occurred about 6 months,which indicates El Nio has a lagged influence on the climate in the west China.