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Title: Solar activity and regional climate over short time scales at Thiruvananthapuram, South Kerala, India
Authors: Sugathan, Neena
Biju, V
Renuka, G
Keywords: Solar irradiance;Sunspot number;Surface air temperature
Issue Date: Apr-2013
Publisher: NISCAIR-CSIR, India
PACS No.: 96.60.qd; 92.60.hv
Abstract: Possible correlation between solar activity and surface air temperature, however, small yet statistically significant that could exist over very small time scales at a particular station, is presented during a period in which the sunspot number exhibit a rising trend. The correlation between the variability of the daily and monthly average surface air temperature and solar irradiance at Trivandrum with sunspot number from January 2008 to March 2011 was investigated. The year 2008 was a solar minima year marking the end of 23rd solar cycle from May 1996 to December 2008 with duration of 12.6 years, while year 2009 was the beginning of the 24th solar cycle with the sunspot number showing a gradual rise during 2009-2010. The correlation between sunspot number, solar irradiance and surface air temperature were estimated during winter and pre-monsoon seasons when the effect of clouds was minimum. No statistically significant correlation was obtained between the surface air temperature or solar irradiance and sunspot number over small time scales unlike the small yet statistically significant correlation reported for studies over longer time scales.
Page(s): 69-72
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.42(2) [April 2013]

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