%0 Journal Article
%T Characteristics of Seasonal Response of NDVI to Variations in Temperature and Precipitation in East China and Its Surrounding Areas<br>中国华东及其周边地区NDVI对气温和降水的季节响应
%A CUI Linli
%A SHI Jun
%A <br>崔林丽
%A 史军
%J 资源科学
%D 2012
%I 
%X The interaction between vegetation and the atmosphere is important in geosciences and has become a research focus in recent years. As a sensitive indicator of surface vegetation coverage and vegetation growth status, the Normalized Difference Vegetation Index (NDVI) has been widely used in environmental, ecological, and agricultural studies. With the time lag correlation method, characteristics of spatial and temporal response of NDVI to variations in air temperature and precipitation in East China and its surrounding areas were comprehensively examined based on SPOT VGT-NDVI data, monthly air temperature, and precipitation data at 135 meteorological stations during the period 1998-2011. Results indicate that across the entire study region, both air temperature and precipitation have an influence on NDVI, but air temperature plays a more prominent role. In general, the correlation between NDVI and air temperature is stronger in summer and autumn, and the correlation between NDVI and precipitation is stronger in autumn and spring. In winter, the correlation between NDVI and air temperature and precipitation seem to be low. The lag time of the maximum NDVI in response to air temperature is shorter in spring and autumn. The lag time of the maximum NDVI in response to precipitation is shorter in winter. In summer, the lag time of the maximum NDVI in response to air temperature and precipitation is longer. Spatial distribution of the maximum NDVI-temperature and NDVI-precipitation correlation coefficients varies slightly between the northern and southern parts of the study region in winter, spring and autumn, but in summer, it shows a marked difference between the northern and southern parts. The lag time of the maximum NDVI in response to temperature exhibits an obvious difference between the northern and southern parts of the study region in spring, summer, and autumn, but the lag time of the maximum NDVI in response to precipitation has a little difference between the northern and southern parts in all seasons except summer. Characteristics of response of NDVI to variations in air temperature and precipitation are closely related to the monsoon climate and the features of farming systems in East China and its surrounding areas. In the northern and middle parts of the study region, temperature rises in spring and drops in autumn quickly, and the precipitation is mainly concentrated in summer. In addition, cropland occupies a larger percentage in East China and its surrounding areas, with relatively consistent sowing- and harvest-time. Both may result in seasonal variations in NDVI and differences in the lag time of the maximum NDVI in response to temperature and precipitation.
%K SPOT VGT-NDVI
%K Temperature
%K Precipitation
%K Seasonal response
%K Lag time
%K East China<br>SPOTVGT-NDVI
%K 气温
%K 降水
%K 季节响应
%K 滞后期
%K 华东
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=E0B7EF588532D46BCFAC714D823BC06F&yid=99E9153A83D4CB11&vid=339D79302DF62549&iid=CA4FD0336C81A37A&sid=35FC3610259C2B32&eid=869807E2D7BED9EC&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=24