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AGU: Geophysical Research Letters

 

Index Terms

  • Atmospheric Processes: Climatology
  • Nonlinear Geophysics: Pattern formation
  • Biogeosciences: Data sets
  • Biogeosciences: Climate dynamics
  • Global Change: Climate variability

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 32, L13801, 5 PP., 2005
doi:10.1029/2005GL022431

Combined winter climate regimes over the North Atlantic/European sector 1766–2000

C. Casty

Institute of Geography, University of Bern, Bern, Switzerland

D. Handorf

Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany

M. Sempf

Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany

This paper presents combined winter climate regimes for the 1766–2000 period over the North Atlantic/European sector. We expand previous studies on recurrent regimes by combining spatially high-resolved independent reconstructions of the 500 hPa geopotential height, land surface air temperature, and precipitation fields. Nonlinear Principal Component Analysis is applied to the data in order to account for the underlying nonlinear dynamics of climate regimes. Three recurrent winter climate regimes are detected. One regime resembles in its pressure, temperature, and precipitation pattern the positive phase of the North Atlantic Oscillation, whereas the other two regimes are European blocking situations.

Received 13 January 2005; accepted 31 May 2005; published 1 July 2005.

Citation: Casty, C., D. Handorf, and M. Sempf (2005), Combined winter climate regimes over the North Atlantic/European sector 1766–2000, Geophys. Res. Lett., 32, L13801, doi:10.1029/2005GL022431.

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