Phase-coherent oscillatorymodes in solar andgeomagnetic activity and climate variability
نویسندگان
چکیده
Oscillatory modes with the period of approximately 7–8 years were detected in monthly time series of sunspot numbers, geomagnetic activity aa index, NAO 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 1950’s, 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 years.
منابع مشابه
NorthHemisphere patterns of phase coherence between solar/geomagmetic activity andNCEP/NCARandERA40 near-surface air temperature in period 7-8y oscillatorymodes
Beginning from 1950’s, Paluš and Novotná (J. Atmos. Sol.-Terr. Phys. 71, 923–930, 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, NAO index and near-surface air temperature from several mid-latitude European stations. Using again the osci...
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