A climatological study of the relations among solar activity, galactic cosmic ray and precipitation on various regions over the globe

Details A climatological study of the relations among solar activity, galactic cosmic ray and precipitation on various regions over the globe A climatological study of the relations among solar activity, galactic cosmic ray and precipitation on various regions over the globe

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jess..119..201b&link_type=abstract

Journal of Earth System Science, Volume 119, Issue 2, pp.201-209

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Solar Activity, Precipitation, Earth, Galactic Cosmic Rays

Scientific paper

We apply Fourier and wavelet analyses to the precipitation and sunspot numbers in the time series (1901-2000) over Australia (27°S, 133°E), Canada (60°N, 95°W), Ethiopia (8°N, 38°E), Greenland (72°N, 40°W), United Kingdom (54°N, 2°W), India (20°N, 77°E), Iceland (65°N, 18°W), Japan (36°N, 138°E), United States (38°N, 97°W), South Africa (29°S, 24°E) and Russia (60°N, 100°E). Correlation analyses were also performed to find any relation among precipitation, sunspot numbers, temperature, and cloud-cover at the same spatial and temporal scale. Further correlations were also performed between precipitation with electron and proton fluence at the time interval, 1987-2006. All these parameters were considered in annual and seasonal scales. Though correlation study between precipitation and other parameters do not hint any linear relation, still the Fourier and wavelet analyses give an idea of common periodicities. The 9-11 year periodicity of sunspot numbers calculated by Fourier transform is also confirmed by wavelet transform in annual scale. Similarly, wavelet analysis for precipitation also supports the short periods at 2-5 years which is verified by Fourier transform in discontinuous time over different geographic regions.

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