The implications of climate policy for the impacts of climate change on global water resources

被引:127
作者
Arnell, Nigel W. [1 ]
van Vuuren, Detlef P. [2 ]
Isaac, Morna [2 ]
机构
[1] Univ Reading, Walker Inst Climate Syst Res, Reading RG6 6AR, Berks, England
[2] Netherlands Environm Assessment Agcy, Bilthoven, Netherlands
来源
GLOBAL ENVIRONMENTAL CHANGE-HUMAN AND POLICY DIMENSIONS | 2011年 / 21卷 / 02期
基金
英国自然环境研究理事会;
关键词
Climate policy; Climate impacts; Mitigation; Water resources; ADAM; GREENHOUSE-GAS; SCENARIOS; MITIGATION; STABILIZATION; VULNERABILITY; EMISSIONS; SCARCITY; MODEL;
D O I
10.1016/j.gloenvcha.2011.01.015
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This paper assesses the implications of climate policy for exposure to water resources stresses. It compares a Reference scenario which leads to an increase in global mean temperature of 4 degrees C by the end of the 21st century with a Mitigation scenario which stabilises greenhouse gas concentrations at around 450 ppm CO(2)e and leads to a 2 degrees C increase in 2100. Associated changes in river runoff are simulated using a global hydrological model, for four spatial patterns of change in temperature and rainfall. There is a considerable difference in hydrological change between these four patterns, but the percentages of change avoided at the global scale are relatively robust. By the 2050s, the Mitigation scenario typically avoids between 16 and 30% of the change in runoff under the Reference scenario, and by 2100 it avoids between 43 and 65%. Two different measures of exposure to water resources stress are calculated, based on resources per capita and the ratio of withdrawals to resources. Using the first measure, the Mitigation scenario avoids 8-17% of the impact in 2050 and 20-31% in 2100; with the second measure, the avoided impacts are 5-21% and 15-47% respectively. However, at the same time, the Mitigation scenario also reduces the positive impacts of climate change on water scarcity in other areas. The absolute numbers and locations of people affected by climate change and climate policy vary considerably between the four climate model patterns. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:592 / 603
页数:12
相关论文
共 36 条
[1]   Future long-term changes in global water resources driven by socio-economic and climatic changes [J].
Alcamo, Joseph ;
Floerke, Martina ;
Maerker, Michael .
HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES, 2007, 52 (02) :247-275
[2]  
[Anonymous], 1997, WATER FUTURES ASSESS
[3]  
[Anonymous], UN PUBL
[4]  
[Anonymous], 2008, World Population Prospects: The 2008 Revision
[5]  
[Anonymous], MAG1CC SCENGEN 4 1 T
[6]  
[Anonymous], 2007, CLIMATE CHANGE 2007
[7]  
[Anonymous], HYDROLOGICA IN PRESS
[8]  
[Anonymous], MITIGATION ADAPTATIO
[9]  
[Anonymous], GLOBAL ENV IN PRESS
[10]  
[Anonymous], 4815080172004 RIVM N