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Attribution of extreme climate events

PA Stott, N Christidis, FEL Otto, Y Sun, JP Vanderlinden, GJ van Oldenborgh, R Vautard, H von Storch, P Walton, P Yiou, F Zwiers

Extreme weather or climate-related events occur in a particular place, by definition, infrequently. It is therefore challenging to detect systematic changes in their occurrence given the relative shortness of observational records. However there is a clear interest from outside the climate science community in the extent to which recent damaging extreme events can be linked to human induced climate change or natural climate variability. Event attribution studies seek to determine to what extent anthropogenic climate change has altered the probability or magnitude of particular events. They have shown clear evidence for human influence having increased the probability of many extremely warm seasonal temperatures and reduced the probability of extremely cold seasonal temperatures in many parts of the world. The evidence for human influence on the probability of extreme precipitation events, droughts and storms is more mixed. Although the science of event attribution has developed rapidly in recent years, geographical coverage of events remains patchy and based on the interests and capabilities of individual research groups. The development of operational event attribution would allow a more timely and methodical production of attribution assessments than currently obtained on an ad-hoc basis. For event attribution assessments to be most useful, remaining scientific uncertainties need to be robustly assessed and the results clearly communicated. This requires the continuing development of methodologies to assess the reliability of event attribution results and further work to understand the potential utility of event attribution for stakeholder groups and decision makers.

Bibliografische gegevens

PA Stott, N Christidis, FEL Otto, Y Sun, JP Vanderlinden, GJ van Oldenborgh, R Vautard, H von Storch, P Walton, P Yiou, F Zwiers. Attribution of extreme climate events
published, WIRES Climate Change, 2015, 7

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