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1982—2006 年京津冀地区植被时空变化及其与降水和地面气温的联系
Authors
刘晓东[1]
晏利斌[1,2]
Publication date
1 January 2011
Publisher
Abstract
利用NOAA/AVHRR归一化植被指数(Normalized difference vegetation index,NDVI),分析过去25年(1982—2006年)京津冀地区生长季(4—10月)植被覆盖时空变化、趋势及其与降水和地面气温的联系。经验正交函数展开(EOF)、奇异值分解(SVD)及相关分析,结果表明:过去25年京津冀地区植被总体呈增加趋势,其中,河北中部地区增长速率超过3%/10 a。植被覆盖年际变化与气温变化呈正相关,但与降水变化的正相关更加显著。1989年和1999—2002年的干旱导致当年NDVI显著减少,而1990、1998年和2003—2005年降水增加使得研究区NDVI明显增加。</p
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Last time updated on 03/02/2019