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长江上游安宁河流域植被生长变化对气候条件的响应

DOI: 10.6046/gtzyyg.2015.03.18, PP. 108-113

Keywords: 植被,气候,响应机制,安宁河流域

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Abstract:

为探讨安宁河流域植被演变趋势及其与气候的相互作用,基于2001-2008年MODIS图像、降水量和气温数据,采用回归分析和相关分析等方法计算了安宁河流域降水、气温和归一化差值植被指数(normalizeddifferencevegetationindex,NDVI)在时间和空间上的变化情况,并对安宁河流域植被生长变化对气候条件的响应机制进行了探讨。结果表明:NDVI变化和气温、降水呈正相关;降水量和气温等气候因子的变动会直接反映在植被长势上,其中降水对安宁河流域植被生长的影响更为显著;植被长势与气温和降水存在一定的时间滞后性。

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