基于MODIS遥感监测的东南亚地区植被动态

Vegetation spatiotemporal variation in Southeast Asia based on MODIS remote sensing monitoring

利用2000—2008年的MODIS陆地产品MOD15A2(fPAR)与空间插值的气温和热带降雨观测卫星(TRMM)数据,分析了东南亚地区植被时空动态,主要分析了常绿阔叶林、灌丛草原、热带草丛和农田4种植被fPAR的年际变化、季节变化特征及其与气候的相关性。结果表明:(1)2000—2008年研究区植被的fPAR平均为47.58%,呈由西北向东南递增、沿海高于内陆的空间分布格局。(2)研究区87.34%的区域植被fPAR变化不显著。(3)fPAR能够反映植被时空动态,对气候变化具有较好的响应。fPAR的动态变化表明,不同区域的各植被生长年际变化各有差异,其所受气温和降水的影响程度也不同。

By using the 2000-2008 MODIS land information MOD15A2（fPAR）and the TRMM data of air temperature and precipitation in tropics,this paper studied the vegetations spatiotemporal variation in Southeast Asia,with the focus on the inter-annual and seasonal variations of fPAR in evergreen broadleaf forests,woody savannas,grasslands,and croplands,and the correlations of these variations with climate conditions.In 2000-2008,the vegetations fPAR in Southeast Asia was averagely 47.58%,being increased from northwest to southeast and from coastal area to inland.In 87.34% of the study area,the fPAR had no significant variation.The fPAR could well reflect the vegetation seasonal variation in Southeast Asia,and had good responses to climate change.The variations of the fPAR suggested that the inter-annual variation of vegetation growth differed with regions,and the variation degree under the effects of air temperature and precipitation also varied.