干旱地区农业研究2016，Vol.34Issue(6)：266-273,8.DOI:10.7606/j.issn.1000-7601.2016.06.40
山西省不同生态分区增强型植被指数(EVI)对气候因子的响应
Response of enhanced vegetation index (EVI) to climatic factors in different ecological division of Shanxi Province
摘要
Abstract
Using the data of MODIS EVI,monthly mean air temperature and precipitation from 27 weather stations and transpiration from MOD16 during 2000 to 2014,analyzed the vegetation cover change in recent 15 years in Shanxi Province and its response feature to temperature,precipitation and evapotranspiration.The result showed that:(1) Overall the vegetation cover showed an upward trend,the increasing speed was 2.6 ％· 10a-1.In the different ecological division,the eastern mountain area Ⅱ ＞ the central basin Ⅲ ＞ the western mountain area Ⅳ ＞ the north Shanxi mountain area Ⅰ ＞ the west Shanxi loess Ⅴ.(2) The vegetation cover in Shanxi Province possessed rather large regional difference.Among them and the EVI in southeast part was obvious higher than the northwest part.The EVI frequency chart was appeared "unimodal structure".The most parts of province was showed unchange or increasing trend,the notable area ratio was 25.95 ％ and the degradation area ratio was 1.04 ％.(3) The yearly EVI with the precipitation and evapotranspiration was assumed positive correlation,negative correlation with the temperature,The monthly EVI with the temperature and evapotranspiration was showed significantly positive correlation.The correlation between evapotranspiration and EVI was better than the single factor as precipitation and temperature.Also the precipitation with EVI change was existed a threshold value.(4) From growing season considered the evapotranspiration with EVI,we can known that from spring to summer each big ecological region total showed positive correlation and strengthened gradually.In autumn,all other natural areas were negative correlation except the middle part of the central basin Ⅲ.关键词
增强型植被指数/生态分区/蒸散量/气候因子/山西省Key words
EVI/ecological division/ET/climatic factors/Shanxi Province分类
农业科技引用本文复制引用
王虎威,张福平,燕玉超,雷声剑..山西省不同生态分区增强型植被指数(EVI)对气候因子的响应[J].干旱地区农业研究,2016,34(6):266-273,8.基金项目
国家科技支撑项目(2012BAC08B07) （2012BAC08B07）
国家人力资源和社会保障部留学人员科技活动项目择优资助项目 （）
中央高校基本科研业务费科研发展专项(GK201505112) （GK201505112）
