Journal
ENVIRONMENTAL MONITORING AND ASSESSMENT
Volume 61, Issue 1, Pages 9-35Publisher
KLUWER ACADEMIC PUBL
DOI: 10.1023/A:1006393415542
Keywords
climate change; risk; adaptation; thresholds; limits
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Adaptation in response to anthropogenic climate change seeks to maintain viability by maximising benefits and minimising losses. It is necessary because some climatic change is now inevitable, despite the international focus on mitigation measures. Indeed, the measures agreed at Kyoto would by themselves result in only a small reduction in the climate changes to be expected over the next century. Discussion of the expected changes and possible impacts leads to the following conclusions regarding climate change scenarios in relation to impacts and adaptation: Climate change in the foreseeable future will not be some new stable equilibrium climate, but rather an ongoing transient process; Climate change predictions relevant to impacts on most sectors and ecosystems are still highly uncertain; There is a need for a greater focus on developing countries and tropical regions, and on relevant key variables, including the magnitude and frequency of extreme events; The focus should shift from single predictions, or extreme ranges of uncertainty, to risk assessment; Thresholds critical to impacted sectors and ecosystems should be identified, and expressed as functions of climatic variables; Planned adaptations will be necessary to cope with multiple stresses, including those due to non-climatic changes; A major task of adaptation science is to identify the limits of adaptation, i.e., to identify dangerous levels of greenhouse gases beyond which adaptation becomes impractical or prohibitively expensive.
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