Atmospheric rivers induced heavy precipitation and flooding in the western U.S. simulated by the WRF regional climate model

A 20‐year regional climate simulated by the Weather Research and Forecasting model has been analyzed to study the influence of the atmospheric rivers and land surface conditions on heavy precipitation and flooding in the western U.S. The simulation realistically captured the mean and extreme precipi...

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Veröffentlicht in:Geophysical research letters 2009-02, Vol.36 (3), p.n/a
Hauptverfasser: Leung, L. Ruby, Qian, Yun
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container_title Geophysical research letters
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Qian, Yun
description A 20‐year regional climate simulated by the Weather Research and Forecasting model has been analyzed to study the influence of the atmospheric rivers and land surface conditions on heavy precipitation and flooding in the western U.S. The simulation realistically captured the mean and extreme precipitation, and the precipitation/temperature anomalies of all the atmospheric river events between 1980–1999. Contrasting the 1986 President Day and 1997 New Year Day events, differences in atmospheric stability have an influence on the spatial distribution of precipitation. Although both cases yielded similar precipitation, the 1997 case produced more runoff. Antecedent soil moisture, rainfall versus snowfall, and existing snowpack all seem to play a role, leading to a higher runoff to precipitation ratio for the 1997 case. This study underscores the importance of the atmospheric rivers and land surface conditions for predicting heavy precipitation and floods in the current and future climate of the western U.S.
doi_str_mv 10.1029/2008GL036445
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Ruby</creatorcontrib><creatorcontrib>Qian, Yun</creatorcontrib><creatorcontrib>Pacific Northwest National Lab. (PNNL), Richland, WA (United States)</creatorcontrib><title>Atmospheric rivers induced heavy precipitation and flooding in the western U.S. simulated by the WRF regional climate model</title><title>Geophysical research letters</title><addtitle>Geophys. Res. Lett</addtitle><description>A 20‐year regional climate simulated by the Weather Research and Forecasting model has been analyzed to study the influence of the atmospheric rivers and land surface conditions on heavy precipitation and flooding in the western U.S. The simulation realistically captured the mean and extreme precipitation, and the precipitation/temperature anomalies of all the atmospheric river events between 1980–1999. Contrasting the 1986 President Day and 1997 New Year Day events, differences in atmospheric stability have an influence on the spatial distribution of precipitation. 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source Wiley Free Content; Wiley-Blackwell AGU Digital Library; Wiley Online Library Journals Frontfile Complete; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
subjects atmospheric rivers
Atmospheric sciences
CLIMATE MODELS
CLIMATES
Earth sciences
Earth, ocean, space
ENVIRONMENTAL SCIENCES
Exact sciences and technology
Extreme weather
Flooding
FLOODS
FORECASTING
Freshwater
heavy precipitation
Hydrology
Meteorology
MOISTURE
PRECIPITATION
RIVERS
RUNOFF
SIMULATION
Snowpack
Soil moisture
SOILS
SPATIAL DISTRIBUTION
STABILITY
WEATHER
title Atmospheric rivers induced heavy precipitation and flooding in the western U.S. simulated by the WRF regional climate model
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