Increased Browning of Woody Vegetation due to Continuous Seasonal Droughts in Yunnan Province, China  

作　　者：CHEN Hong-Ping JIA Gen-Suo FENG Jin-Ming DONG Yan-Sheng 

机构地区：[1]Key Laboratory of Regional Climate-Environment for East Asia,Institute of Atmospheric Physics, Chinese Academy of Sciences [2]University of Chinese Academy of Sciences, [3]Beijing Research Center for Information Technology in Agriculture

出　　处：《Atmospheric and Oceanic Science Letters》2014年第2期120-125,共6页大气和海洋科学快报（英文版）

基　　金：funded by the National Basic Research Program of China (Grant No. 2012CB956202);the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA05090200)

摘　　要：In this paper, based on the analysis of satellite measurements, the authors conclude that the continuous seasonal droughts intensify the browning of woody vegetation and that evergreen needleleaf forest(ENF) shows a larger browning percentage than other woody vegetation types over Yunnan Province. Based on the Tropical Rainfall Measuring Mission(TRMM) precipitation standardized anomaly, in the dry season, which is from October to March, the 2010 drought affected an area of Yunnan Province 1.77 times larger than the 2012 drought, but in the post-drought months(April to June), the browning area of all woody vegetation in 2012 was 1.11 times larger than that in 2010 on the basis of the enhanced vegetation index(EVI) standardized anomaly. The reduction of vegetation greenness over large areas of Yunnan Province represents a photosynthetic capacity loss which will have an impact on carbon fluxes to the atmosphere.In this paper, based on the analysis of satellite measurements, the authors conclude that the continuous seasonal droughts intensify the browning of woody vegetation and that evergreen needleleaf forest（ENF） shows a larger browning percentage than other woody vegetation types over Yunnan Province. Based on the Tropical Rainfall Measuring Mission（TRMM） precipitation standardized anomaly, in the dry season, which is from October to March, the 2010 drought affected an area of Yunnan Province 1.77 times larger than the 2012 drought, but in the post-drought months（April to June）, the browning area of all woody vegetation in 2012 was 1.11 times larger than that in 2010 on the basis of the enhanced vegetation index（EVI） standardized anomaly. The reduction of vegetation greenness over large areas of Yunnan Province represents a photosynthetic capacity loss which will have an impact on carbon fluxes to the atmosphere.

关 键 词：Yunnan Province DROUGHT enhanced vegetation index woody vegetation standard anomaly 

分 类 号：P461.7[天文地球—大气科学及气象学]