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GEOPHYSICAL RESEARCH LETTERS,
VOL. 31,
L15203,
4 PP., 2004
doi:10.1029/2004GL020050
Century-scale solar variability and Alaskan temperature change over the past millennium
Department of Geology, The College of Wooster, Wooster, Ohio, USA
Tree Ring Lab, Lamont-Doherty Earth Observatory, Palisades, New York, USA
Departamento de Dendrocronologia e Historia Ambiental, Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Centro Regional de Investigaciones Científicas y Tecnológicas, Mendoza, Argentina
Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado, USA
Department of Geology, State University of New York at Cortland, Cortland, New York, USA
Correlation of geologic histories from 130 Alaskan glaciers with a record of solar variation suggests that multi-decadal to century-scale temperature variations in the North Pacific and Arctic sectors have been influenced by solar forcing over the past thousand years. Mountain glacier fluctuations are primarily a record of summer cooling and the composite glacial history from three climatic regions across Alaska shows ice expansions approximately every 200 years, compatible with a solar mode of variability. The modulating effects of the cold phases of the Pacific Decadal Oscillation and the Arctic Oscillation may, when in phase with decreased solar activity, serve to amplify cooling, forcing glacier advance.
Received 22 March 2004; accepted 2 July 2004; published 7 August 2004.
Citation: (2004), Century-scale solar variability and Alaskan temperature change over the past millennium, Geophys. Res. Lett., 31, L15203, doi:10.1029/2004GL020050.
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