期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 111, 期 9, 页码 3233-3238出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1222471110
关键词
coinciding pressures; differential climate impacts; ISI-MIP
资金
- German Federal Ministry of Education and Research [01LS1201A]
- Joint Department of Energy and Climate Change/Defra Met Office Hadley Centre Climate Programme [GA01101]
- Federal Ministry for the Environment
- Nature Conservation and Nuclear Safety [11_II_093_Global_A_SIDS_and_LDCs]
- EUFP7 Quantifying Weather and Climate Impacts on Health in Developing Countries (QWeCI) and HEALTHY FUTURES project
- Environment Research and Technology Development Fund of the Ministry of the Environment, Japan [S-10]
- EU [282672]
- [266992]
- [238366]
- Natural Environment Research Council [ceh010022] Funding Source: researchfish
- Direct For Computer & Info Scie & Enginr
- Division Of Computer and Network Systems [1215910] Funding Source: National Science Foundation
The impacts of global climate change on different aspects of humanity's diverse life-support systems are complex and often difficult to predict. To facilitate policy decisions on mitigation and adaptation strategies, it is necessary to understand, quantify, and synthesize these climate-change impacts, taking into account their uncertainties. Crucial to these decisions is an understanding of how impacts in different sectors overlap, as overlapping impacts increase exposure, lead to interactions of impacts, and are likely to raise adaptation pressure. As a first step we develop herein a framework to study coinciding impacts and identify regional exposure hotspots. This framework can then be used as a starting point for regional case studies on vulnerability and multifaceted adaptation strategies. We consider impacts related to water, agriculture, ecosystems, and malaria at different levels of global warming. Multisectoral overlap starts to be seen robustly at a mean global warming of 3 degrees C above the 1980-2010 mean, with 11% of the world population subject to severe impacts in at least two of the four impact sectors at 4 degrees C. Despite these general conclusions, we find that uncertainty arising from the impact models is considerable, and larger than that from the climate models. In a low probability-high impact worst-case assessment, almost the whole inhabited world is at risk for multisectoral pressures. Hence, there is a pressing need for an increased research effort to develop a more comprehensive understanding of impacts, as well as for the development of policy measures under existing uncertainty.
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