1982-2013年青藏高原植被动态变化时序分析

针对不同的数据源及时间和空间尺度会使植被覆盖度及其与气象因子影响的结果有所差别这一情况,该文基于青藏高原1982-2012年GIMMS NDVI和2001-2013年MODIS NDVI遥感数据集,结合研究区内12个典型的气象站点数据,进行了青藏高原地区植被覆盖时空动态变化规律及其与气象因子响应的时序分析,并利用重合时间段的数据对比分析了两种传感器在青藏高原地区对植被动态变化监测方面的差异.结果表明:近30年来,青藏高原地区植被呈整体改善趋势,尤其是高海拔地区;不同阶段植被的变化趋势有所不同;两种传感器在反映植被动态变化趋势上差异显著,但两者与气候因子的响应规律相同.

Temporal and spatial variation analysis of vegetation on the Tibetan Plateau from 1982 to 2013

Aiming at the problem that different data source and time and space scale presented different relation between vegetation coverage and meteorological factors,two remote sensing datasets(GIMMS NDVI from 1982 to 2012 and MODIS NDVI from 2001 to 2013)and 12 typical meteorological site data of Tibetan Plateau were chosen to explore temporal and spatial variation of vegetation and its relationships with meteorological factors.Then the differences in dynamic monitoring of vegetation between GIMMS NDVI and MODIS NDVI were analyzed using the overlapping data.Experimental results showed that:the vegetation on the Tibetan Plateau,especially in high altitude area,increased in the past 30 years;at the same time,different periods presented different vegetation change;the consistency of GIMMS NDVI and MODIS NDVI was different when reflected the inter-annual variation trend of vegetation,while they responded to all meteorological factors with the same trend.