Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 48, Issue 5, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2020GL091823
Keywords
climate change; extreme precipitation; global climate model projection; impact studies; south‐ eastern Mediterranean
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Funding
- Israel Ministry of Science and Technology [61792]
- Israel Science Foundation [1069/18]
- NSF-BSF [BSF 2016953]
- JNF [90-01-550-18]
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Observational constraints can be used to predict rare extreme precipitation events, improving the predictability of local extreme conditions. This approach does not rely on improvements in climate models at regional and local scales.
Projections of extreme precipitation based on modern climate models suffer from large uncertainties. Specifically, unresolved physics and natural variability limit the ability of climate models to provide actionable information on impacts and risks at the regional, watershed and city scales relevant for practical applications. Here, we show that the interaction of precipitating systems with local features can constrain the statistical description of extreme precipitation. These observational constraints can be used to project local extremes of low yearly exceedance probability (e.g., 100-year events) using synoptic-scale information from climate models, which is generally represented more accurately than the local scales, and without requiring climate models to explicitly resolve extremes. The novel approach, demonstrated here over the south-eastern Mediterranean, offers a path for improving the predictability of local statistics of extremes in a changing climate, independent of pending improvements in climate models at regional and local scales.
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