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ENSO influences on atmospheric circulation and precipitation in the western United States

Daniel R. Cayan, Kelly T. Redmond

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Abstract

EXTRACT (SEE PDF FOR FULL ABSTRACT):The influence of ENSO on atmospheric circulation and precipitation over the western United States is presented from two perspectives. First, ENSO-associated circulation patterns over the North Pacific/North America sector were identified using an REOF (rotated empirical orthogonal function) analysis of the 700-mb height field and compositing these for extreme phases of the Southern Oscillation Index. ... Second, we examine the variability of precipitation during the warm and cool phases of ENSO for different locations in the western United States.

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EXTRACT (SEE PDF FOR FULL ABSTRACT):The influence of ENSO on atmospheric circulation and precipitation over the western United States is presented from two perspectives. First, ENSO-associated circulation patterns over the North Pacific/North America sector were identified using an REOF (rotated empirical orthogonal function) analysis of the 700-mb height field and compositing these for extreme phases of the Southern Oscillation Index. ... Second, we examine the variability of precipitation during the warm and cool phases of ENSO for different locations in the western United States.

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Available abstract

EXTRACT (SEE PDF FOR FULL ABSTRACT):The influence of ENSO on atmospheric circulation and precipitation over the western United States is presented from two perspectives. First, ENSO-associated circulation patterns over the North Pacific/North America sector were identified using an REOF (rotated empirical orthogonal function) analysis of the 700-mb height field and compositing these for extreme phases of the Southern Oscillation Index. ... Second, we examine the variability of precipitation during the warm and cool phases of ENSO for different locations in the western United States.

Key concepts: Empirical orthogonal functions, Climatology, El Niño Southern Oscillation, Atmospheric circulation, Precipitation, Circulation (fluid dynamics), Environmental science, Geography

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