The role of the Siberian high in northern hemisphere climate variability
Author(s)
Cohen, Judah; Saito, Kazuyuki; Entekhabi, Dara
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The dominant mode of sea level pressure (SLP) variability during the winter months in the Northern Hemisphere (NH) is characterized by a dipole with one anomaly center covering the Arctic with the opposite sign anomaly stretched across the mid-latitudes. Associated with the SLP anomaly, is a surface temperature anomaly induced by the anomalous circulation. We will show that this anomaly pattern originates in the early fall, on a much more regional scale, in Siberia. As the season progresses this anomaly pattern propagates and amplifies to dominate much of the extratropical NH, making the Siberian high a dominant force in NH climate variability in winter. Also since the SLP and surface temperature anomalies originate in a region of maximum fall snow cover variability, we argue that snow cover partially forces the phase of winter variability and can potentially be used for the skillful prediction of winter climate.
Date issued
2001-01Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary SciencesJournal
Geophysical Research Letters
Publisher
American Geophysical Union (AGU)
Citation
Cohen, Judah, Kazuyuki Saito, and Dara Entekhabi. “The Role of the Siberian High in Northern Hemisphere Climate Variability.” Geophysical Research Letters 28.2 (2001): 299–302. © 2001 by the American Geophysical Union
Version: Final published version
ISSN
0094-8276