基于SPOT－Vegetation 10 d产品数据及新疆巴音布鲁克气象站观测资料，运用小波分析与统计分析相结合的方法，从多时间尺度研究博湖流域1998—2009年间植被覆盖的非线性变化趋势，以及植被覆盖对气候变化的多尺度响应。结果表明： NDVI序列表现出具有时间尺度依赖性的非线性变化趋势，时间尺度从20 d到40 d、80 d、160 d， NDVI变化的周期性逐渐显现，最后到320 d尺度上NDVI变化趋势彰显出来；旬平均气温和旬降水在各个尺度上也呈现出与NDVI一致的变化趋势；从6个时间尺度看， NDVI与平均气温、降水之间存在着显著的线性相关关系，在小于40 d的时间尺度上，气温对NDVI的影响更大，而在80～160 d尺度上，降水的影响更强。%Based on SPOT-Vetetation 10 d images and meteorological data from Bayanbulak Meteorological Station this paper investigated the vegetation dynamic and its response to climate factors at different time scales during 1998-2009 in Bostent Lake Basin Xinjiang using wavelet analysis and statistical analysis. The main findings are as follows the NDVI time series presented nonlinear patterns that varied with timescales. Its periodicity manifested itself more and more with the increase of time scale from 20 d to 40 d to 80 d to 160 d until it finally stabilized at the 320 -day scale. The average temperature and precipitation in 10 days both presented the approximately coincident nonlinear patterns with that of NDVI. This further supported the significant relationship between NDVI and these two climate factors from the morphologically similar view. Temperature has greater impact on NDVI with time scale less than 40 days while precipitation has stronger influence on NDVI on time scales between 80 to 160 d.
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