文献类型：期刊文献

英文题名：Variability and Changes in Climate, Phenology, and Gross Primary Production of an Alpine Wetland Ecosystem

作者：Kang, Xiaoming[1,2] Hao, Yanbin[3] Cui, Xiaoyong[3] Chen, Huai[4] Huang, Sanxiang[5] Du, Yangong[6] Li, Wei[1,2] Kardol, Paul[7] Xiao, Xiangming[8,9] Cui, Lijuan[1,2]

第一作者：康晓明;Kang, Xiaoming

通信作者：Cui, LJ[1];Cui, LJ[2]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing Key Lab Wetland Serv & Restorat, Beijing 100091, Peoples R China;[2]Sichuan Zoige Wetland Ecosystem Res Stn, Beijing 624500, Tibetan Autonom, Peoples R China;[3]Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China;[4]Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China;[5]Beijing Gardens Green Bur, Beijing 100013, Peoples R China;[6]Chinese Acad Sci, Key Lab Adaptat & Evolut Plateau Biota, Northwest Inst Plateau Biol, Xining 810008, Peoples R China;[7]Swedish Univ Agr Sci, Dept Forest Ecol & Management, S-90183 Umea, Sweden;[8]Univ Oklahoma, Dept Microbiol & Plant Biol, Ctr Spatial Anal, Norman, OK 73019 USA;[9]Fudan Univ, Inst Biodivers Sci, Shanghai 200433, Peoples R China

年份：2016

卷号：8

期号：5

外文期刊名：REMOTE SENSING

收录：;EI(收录号：20162302468705);Scopus(收录号：2-s2.0-84971430825);WOS:【SCI-EXPANDED(收录号:WOS:000378406400035)】；

基金：This work was supported by a National Nonprofit Institute Research Grant from CAFINT (Grant No. CAFINT2014K06), the National Youth Science Foundation of China (Grant No. 31300417), the National Natural Science Foundation of China (Grant No. 31170459), Si Chuan Province Youth Scientific and technological innovation research team (Grant No. 2015TD0026), and the NASA Earth Observing System (EOS) Data Analysis Program (Grant No. NNX09AE93G). We thank the principal investigators of the MODIS data products as well as the Oak Ridge National Laboratory's (ORNL) Distributed Active Archive Center (DAAC) and the Earth Observing System (EOS) Data Gateway for making these MODIS products available. We thank the anonymous reviewers and editors for their valuable comments and suggestions on the earlier versions of the manuscript.

语种：英文

外文关键词：climate change; phenology; VPM; gross primary production; Qinghai-Tibetan Plateau; alpine wetland

摘要：Quantifying the variability and changes in phenology and gross primary production (GPP) of alpine wetlands in the Qinghai-Tibetan Plateau under climate change is essential for assessing carbon (C) balance dynamics at regional and global scales. In this study, in situ eddy covariance (EC) flux tower observations and remote sensing data were integrated with a modified, satellite-based vegetation photosynthesis model (VPM) to investigate the variability in climate change, phenology, and GPP of an alpine wetland ecosystem, located in Zoige, southwestern China. Two-year EC data and remote sensing vegetation indices showed that warmer temperatures corresponded to an earlier start date of the growing season, increased GPP, and ecosystem respiration, and hence increased the C sink strength of the alpine wetlands. Twelve-year long-term simulations (2000-2011) showed that: (1) there were significantly increasing trends for the mean annual enhanced vegetation index (EVI), land surface water index (LSWI), and growing season GPP (R-2 >= 0.59, p < 0.01) at rates of 0.002, 0.11 year(-1) and 16.32 g.C.m(-2).year(-1), respectively, which was in line with the observed warming trend (R-2 = 0.54, p = 0.006); (2) the start and end of the vegetation growing season (SOS and EOS) experienced a continuous advancing trend at a rate of 1.61 days.year(-1) and a delaying trend at a rate of 1.57 days.year(-1) from 2000 to 2011 (p <= 0.04), respectively; and (3) with increasing temperature, the advanced SOS and delayed EOS prolonged the wetland's phenological and photosynthetically active period and, thereby, increased wetland productivity by about 3.7-4.2 g.C.m(-2).year(-1) per day. Furthermore, our results indicated that warming and the extension of the growing season had positive effects on carbon uptake in this alpine wetland ecosystem.