Phase-coherent oscillatory modes in solar and geomagnetic activity and climate variability

Details Phase-coherent oscillatory modes in solar and geomagnetic activity and climate variability Phase-coherent oscillatory modes in solar and geomagnetic activity and climate variability

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jastp..71..923p&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 71, Issue 8-9, p. 923-930.

Physics

Solar Activity, Geomagnetic Activity, Nao, Near-Surface Air Temperature, Phase Coherence, Climate Variability

Scientific paper

Oscillatory modes with the period of approximately 7-8 yr were detected in monthly time series of sunspot numbers, geomagnetic activity aa index, NAO (North Atlantic Oscillation) index and near-surface air temperature from several mid-latitude European locations. Instantaneous phases of the modes underwent synchronization analysis and their statistically significant phase coherence, beginning from 1950s, has been observed. Thus the statistical evidence for a coupling between solar/geomagnetic activity and climate variability has been obtained from continuous monthly data, independent of the season, however, confined to the temporal scale related to oscillatory periods about 7-8 yr.

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