Imperial College London
Alternate

ProfessorRalfToumi

Faculty of Natural Sciences, The Grantham Institute for Climate Change

Co-Director, Grantham Institute - Climate Change&Environment
 
 
 
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Contact

 

+44 (0)20 7594 7668r.toumi Website CV

 
 
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Location

 

713Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Phibbs:2016:10.1002/2015JD024286,
author = {Phibbs, S and Toumi, R},
doi = {10.1002/2015JD024286},
journal = {Journal of Geophysical Research: Atmospheres},
pages = {8743--8754},
title = {The dependence of precipitation and its footprint on atmospheric temperature in idealized extratropical cyclones},
url = {http://dx.doi.org/10.1002/2015JD024286},
volume = {121},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Flood hazard is a function of the magnitude and spatial pattern of precipitation accumulation.The sensitivity of precipitation to atmospheric temperature is investigated for idealized extratropicalcyclones, enabling us to examine the footprint of extreme precipitation (surface area where accumulatedprecipitation exceeds high thresholds) and the accumulation in different-sized catchment areas. Themean precipitation increases with temperature, with the mean increase at 5.40%/C. The 99.9th percentileof accumulated precipitation increases at 12.7%/C for 1 h and 9.38%/C for 24 h, both greater thanClausius-Clapeyron scaling. The footprint of extreme precipitation grows considerably with temperature,with the relative increase generally greater for longer durations. The sensitivity of the footprint of extremeprecipitation is generally super Clausius-Clapeyron. The surface area of all precipitation shrinks withincreasing temperature. Greater relative changes in the number of catchment areas exceeding extremetotal precipitation are found when the domain is divided into larger rather than smaller catchment areas.This indicates that fluvial flooding may increase faster than pluvial flooding from extratropical cyclones in awarming world. When the catchment areas are ranked in order of total precipitation, the 99.9th percentile isfound to increase slightly above Clausius-Clapeyron expectations for all of the catchment sizes, from 9 km2to 22,500 km2. This is surprising for larger catchment areas given the change in mean precipitation. Wepropose that this is due to spatially concentrated changes in extreme precipitation in the occluded front
AU  - Phibbs,S
AU  - Toumi,R
DO  - 10.1002/2015JD024286
EP  - 8754
PY  - 2016///
SN  - 2169-8996
SP  - 8743
TI  - The dependence of precipitation and its footprint on atmospheric temperature in idealized extratropical cyclones
T2  - Journal of Geophysical Research: Atmospheres
UR  - http://dx.doi.org/10.1002/2015JD024286
UR  - http://hdl.handle.net/10044/1/38752
VL  - 121
ER  -
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