气候变化研究进展2017，Vol.13Issue(6)：578-588,11.DOI:10.12006/j.issn.1673-1719.2017.071
三峡大坝运行后长江中下游流域气温与植被变化特征及原因分析
Analysis on Characteristics and Causes of Temperature and Vegetation Changes in the Middle and Lower Reaches of the Yangtze River After the Three Gorges Dam Operation
摘要
Abstract
Using daily temperature data of 120 stations in the middle and lower reaches of the Yangtze River during 1971-2015, the variations of average temperature before and after the operation of Three Gorges Dam in four seasons (spring, summer, autumn and winter) were analyzed after removing the impacts of global warming background, the mutation times of high and low temperature days were investigated by the MK test method. Furthermore, the change in soil moisture was investigated by utilizing ERA-Interim soil moisture reanalysis data during 2006-2015, and the vegetation response to the temperature variations was analyzed by utilizing MODIS dataset during 2006-2015. The average temperature in the middle and lower reaches of the Yangtze River showed significant changes after the operation of the Three Gorges Dam, warming phenomenon occurred in the southern study area while cooling phenomenon occurred in the northern study area. The MK test results indicated that the high temperature days in the southern study area and low temperature days in the northern study area both mutated around the time when the Three Gorges Dam began to fully operate. Soil moisture obviously increased in the southern study area. The spatial distribution of the enhanced vegetation index (EVI) trend was consistent with the change of the average temperature in spring, summer and winter, the EVI increased in the southern study area, most significantly in winter (33.06%), but decreased in the northern study area, most significantly in summer (5.11%).关键词
高低温日/EVI/气温变化/土壤湿度/水热条件Key words
high and low temperature days/enhanced vegetation index (EVI)/temperature change/soil moisture/hydrothermal condition引用本文复制引用
葛非凡,毛克彪,蒋跃林,姜立鹏,范玉芬,王一舒,谭雪兰,李建军..三峡大坝运行后长江中下游流域气温与植被变化特征及原因分析[J].气候变化研究进展,2017,13(6):578-588,11.基金项目
资助项目:国家自然科学基金(41571427) （41571427）
国家重点研发计划重点专项(2016YFC0500203) （2016YFC0500203）
