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AGU: Geophysical Research Letters

 

Keywords

  • precipitation
  • general circulation
  • ENSO
  • time series analysis

Index Terms

  • Hydrology: Precipitation
  • Atmospheric Processes: Ocean/atmosphere interactions
  • Oceanography: Physical: ENSO
  • Oceanography: Physical: Fronts and jets

Abstract

A Southern Hemisphere footprint in American Midwest precipitation

Cécile Penland

NOAA/ESRL/PSD3, Boulder, Colorado USA

CIRES/University of Colorado, Boulder, Colorado USA

Ludmila Matrosova

NOAA/ESRL/PSD3, Boulder, Colorado USA

CIRES/University of Colorado, Boulder, Colorado USA

A non-normal filter is used to isolate the El Niño signal in tropical south Atlantic sea surface temperatures (SSTs). In boreal fall, the resulting index is significantly anticorrelated with precipitation in the American Midwest two to three seasons later. The phenomenological reasons for the relationship are explored in this article.

Received 12 February 2008; accepted 24 March 2008; published 6 May 2008.

Citation: Penland, C., and L. Matrosova (2008), A Southern Hemisphere footprint in American Midwest precipitation, Geophys. Res. Lett., 35, L09703, doi:10.1029/2008GL033612.

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