华北平原植被动态对气象干旱的响应特征  

Response Characteristics of Vegetation Greenness to Different Time-scale Meteorological Droughts in Northern China Plain

作　　者：卢洪健 胡智丹 

机构地区：[1]水利部水文局,北京100053

出　　处：《安徽农业科学》2017年第36期4-8,共5页Journal of Anhui Agricultural Sciences

基　　金：水利部公益性行业专项(201301040)

摘　　要：基于中国华北平原1982—2012年NDVI和不同时间尺度SPI/SPEI数据,分析了植被绿度年际波动对气象干旱时间尺度的响应特征。结果表明:华北平原干旱对春季植被绿度的影响强于夏季,对北部的影响强于南部;植被绿度对长期干旱的响应更明显,但局部和季节差异非常明显,北部植被响应干旱的时间尺度较南部短;生长季水分亏缺是其植被干旱脆弱性的主导因素。We evaluated the response of different land biomes to drought by correlating the various timescale SPEI/SPI with a widely used indi-cator of vegetation activity,like the Normalized Difference Vegetation Index （NDVI） in Northern China Plain （NCP） during 1982 -2012. The re-sults showed that the NDVI of spring cultivated vegetation were more sensitive to drought than that of summer vegetation, and the impact of drought on vegetation greenness in northern was more significant than that in southern. The response of vegetation to drought was usually more ob-vious at a long scale,but the strongest response timescale in northern was shorter than southern. In a word,water deficit during the growing season was the main driver of vegetation vulnerability to drought.

关 键 词：植被绿度 干旱 时间尺度 干旱脆弱性 华北平原 

分 类 号：S423[农业科学—植物保护] P467[天文地球—大气科学及气象学]