Physics
Scientific paper
Aug 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jastp..71.1309l&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 71, Issue 12, p. 1309-1321.
Physics
11
Temperature Variability, Solar Activity, European Climate, Lifetime, Winter Months
Scientific paper
Daily temperature and pressure series from 55 European meteorological stations covering the 20th century are analyzed. The overall temperature mean displays a sharp minimum near 1940 and a step-like jump near 1987. We evaluate the evolution of disturbances of these series using mean squared inter-annual variations and "lifetimes". The decadal to secular evolutions of solar activity and temperature disturbances display similar signatures over the 20th century. Because of heterogeneity of the climate system response to solar forcing, regional and seasonal approaches are key to successful identification of these signatures. Most of the solar response is governed by the winter months, as best seen near the Atlantic Ocean. Intensities of disturbances vary by factors in excess of 2, underlining a role for the Sun as a significant forcing factor of European atmospheric variations. We speculate about the possible origin of these solar signatures. The last figure of the paper exemplifies its main results.
Blanter Elena
Courtillot Vincent
Le Mouël Jean Louis
Shnirman Mikhail
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