文献类型：会议论文

英文题名：Assessment on water use efficiency under climate change and heterogeneous carbon dioxide in China terrestrial ecosystems

作者：Zhang, Z.[1] Jiang, H.[1,2] Liu, J. X.[3] Zhou, G. M.[2] Liu, S. R.[4] Zhang, X. Y.[1]

第一作者：Zhang, Z.

通信作者：Jiang, H[1]

机构：[1]Nanjing Univ, Int Inst Earth Syst Sci, Hankou Rd 22, Nanjing 210093, Jiangsu, Peoples R China;[2]Zhejiang Agr & Forestry Univ, State Key Lab Subtrop Forest Sci, Zhejiang Prov Key Lab Carbon Cycling Forest Ecosy, Hangzhou 311300, Zhejiang, Peoples R China;[3]Stinger Ghaffarian Technol SGT Inc, Contractor US Geol Survey USGS, Stinger Ghaffarian Technol SGT, Sioux Falls, SD 57198 USA;[4]Chinese Acad Forestry, Inst Forest Ecol & Environm, Beijing 100091, Peoples R China

会议论文集：18th Biennial ISEM Conference on Ecological Modelling for Global Change and Coupled Human and Natural Systems

会议日期：SEP 20-23, 2011

会议地点：Beijing Normal Univ, Beijing, PEOPLES R CHINA

主办单位：Beijing Normal Univ

语种：英文

外文关键词：water use efficiency; CO2 fertilization; Atmospheric CO2 concentration; IBIS; climate change

年份：2012

摘要：Assessing the effects of climate change on water use efficiency (WUE) is critical for policymaking and adaptation. The influences of heterogeneous distribution of atmospheric carbon dioxide (CO2) concentration on WUE have not considered in China. In this study, we used a spatial-temporal distribution of CO2 constructed from remote sensing data and ground-based observations, to quantify the heterogeneity of CO2 concentrations. Based on the initial conditions, the spatial patterns of WUE in history and future were estimated using the Integrated Biosphere Simulator (IBIS). Results showed that the geographical distributions of the averaged WUE have significant difference under the heterogeneous surface CO2 fertilization condition during 1951-2006. Partial correlation analysis indicated that the cold temperate zones are strong associated with the spatial heterogeneity of CO2, suggesting the special relationship of carbon-water cycle coupling with the interannual variations of CO2. WUE showed high negative correlations with temperature in subtropical zones and positive correlations in Tibet Plateau. The correlation between WUE and precipitation exhibits high positive in wet temperate zones, where the cropland is mainly located. Our estimates of WUE and its covariation with major climate variables can improve understanding of carbon-water cycle coupling under climate change. (C) 2011 Published by Elsevier B. V. Selection and/or peer-review under responsibility of School of Environment, Beijing Normal University.