Indian Science Cruiser

Sourabh Bal ¹, M. Bose ¹

Affiliations
1 Meteorology Department, Freie University, Berlin, DE

Abstract

Variations of sunspot numbers in connection with extreme events like flood, storm, drought, seismic activity, volcanic activity, extreme temperature and sum of all events, defined as total event is studied. We have used Fourier analysis to investigate whether any periodic relation exists between Sun and extreme events. Correlation analysis is also employed to find if there is any relation between solar activity and extreme events exists. Finally, we present the comparison of extreme events with solar activity around sunspot maximum. Our study reveals that the maximum occurrence of drought is observed in the growth phase of solar activity whereas the maximum occurrence of other events coincide either with the sunspot maximum or in the declining stage of solar activity. Besides this we find that the seismic activity relates well with solar activity and the occurrence of maximum number of earthquakes shifted slightly from the time of Sunspot maximum.

Keywords

Earthquake, Extreme Events. Sunspot, Earth.

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Sourabh Bal ¹, M. Bose ¹

Affiliations
1 Department of Physics, Jadvapur University, Jadavpur, Kolkata, IN

Abstract

To realize the effect of a continuous and natural energy source into our country's most needed phenomenon for the agricultural purpose have been studied. 100 years' data (1901-2000), were used for studying effects due to solar activity, temperature and cloud cover on the occurrence of precipitation over India. We examine the correlation coefficients for the seasonal months of March-May (MAM), Jvme-August (JJA), Septemeber- November (SON), December-February (DJF) and annual mean data. Our findings shows that solar activity shows positive (low to moderate) correlations to annual, MAM, JJA precipitation and negative correlation during SON, DJF seasonal months. Wavelet analysis is also employed to study the effect of solar activity on precipitation.

Keywords

Sun: Activity: India, Precipitation, Earth.

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Sourabh Bal ¹, M. Bose ¹

Affiliations
1 Department of Physics, Jadavpur University, Kolkata 700032, IN

Abstract

The TOMS ozone data and the Sunspot numbers in the time interval (1978-2005) have been analyzed using Fourier and Wavelet analysis. The aim of this work is to find any periodicities that may potentially modulate atmospheric and terrestrial phenomena. Fourier analysis of ozone has shown number of short periods, between 2-5 years (yr) and significant period at 9 and 11.6 yr. Sunspot numbers has also shown periodicities between 2-5 yr and 9.7 yr using Fourier Transform. Global ozone wavelet spectrum shove's periodicities around 9-12 yr and Sunspot numbers also shown 9-12 yr period. Correlation analysis is also employed between Sunspot numbers, electron fiuence (1987-2006) with ozone to investigate any relation between them. Finally Global ozone concentration shov/s decreasing trend using Regression analysis. This research contribution may connect establish a possible connection between the ozone concentration and the solar activity.

Keywords

solar activity, ozone, correlation,Eartl,i, Sun, Global.

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