Super‐Clausius–Clapeyron scaling of rainfall in a model squall line

The sensitivity of squall rainfall to changes in atmospheric temperature is investigated. For instantaneous rainrates and accumulations up to one hour, extreme rainfall scales with Clausius‐Clapeyron (CC) for temperatures below 24°C and at up to twice CC above 24°C. For longer accumulation periods a...

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Bibliographic Details
Published in:Quarterly journal of the Royal Meteorological Society Vol. 139; no. 671; pp. 334 - 339
Main Authors: Singleton, Andrew, Toumi, Ralf
Format: Journal Article
Language:English
Published: Chichester, UK John Wiley & Sons, Ltd 01.01.2013
Wiley Subscription Services, Inc
Subjects:
Accumulations
Atmospheric temperature
Clausius–Clapeyron scaling
Climate change
Copyrights
Design parameters
Extreme weather
Flooding
High temperature
PMP
probable maximum precipitation
Rainfall
rainfall extremes
Reproduction
Squalls
ISSN:0035-9009, 1477-870X
Online Access:Get full text
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Summary:The sensitivity of squall rainfall to changes in atmospheric temperature is investigated. For instantaneous rainrates and accumulations up to one hour, extreme rainfall scales with Clausius‐Clapeyron (CC) for temperatures below 24°C and at up to twice CC above 24°C. For longer accumulation periods and higher temperatures the scaling breaks down due to increased propagation of the squall line. For all periods, the storm average rainfall is found to scale at approximately 1.5 times CC over the entire range of temperatures. These results have implications for design parameters for infrastructure that is vulnerable to flooding and for climate change projections. Copyright © 2012 Royal Meteorological Society
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ISSN:0035-9009
1477-870X
DOI:10.1002/qj.1919