Northern Hemisphere patterns of phase coherence between solar/geomagnetic activity and NCEP/NCAR and ERA40 near-surface air temperature in period 7-8 years oscillatory modes

Beginning from the 1950's, Paluš and Novotná (2009) observed statistically significant phase coherence among oscillatory modes with the period of approximately 7–8 years detected in monthly time series of sunspot numbers, geomagnetic activity aa index, North Atlantic Oscillation (NAO) index and...

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Bibliographic Details
Published in:Nonlinear Processes in Geophysics
Main Authors: Paluš, M. (Milan), Novotná, D. (Dagmar)
Format: Article in Journal/Newspaper
Language:English
Published: 2011
Subjects:
climate variability
phase coherence
synchronization
North Atlantic Oscillation
solar activity
North Atlantic
North Atlantic oscillation
Online Access:https://doi.org/10.5194/npg-18-251-2011
http://hdl.handle.net/11104/0200900
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Summary:Beginning from the 1950's, Paluš and Novotná (2009) observed statistically significant phase coherence among oscillatory modes with the period of approximately 7–8 years detected in monthly time series of sunspot numbers, geomagnetic activity aa index, North Atlantic Oscillation (NAO) index and near-surface air temperature from several mid-latitude European stations. Focusing on geographical distribution of the phenomenon we study Northern Hemisphere patterns of phase coherence between solar/geomagnetic activity and NCEP/NCAR and ERA40 near-surface air temperature. Both the reanalysis datasets provide consistent patterns of areas with marked phase coupling between solar/geomagnetic activity and climate variability observed in continuous monthly data, independent of the season, however, confined to the temporal scale related to the oscillatory periods about 7–8 years.

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