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Study of Electrical Properties and the Crystallization Kinetics of Amorphous a-Ge30-x Sbx S70 Films
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Form IV - Statement About Ownership and Other Particulars About Indian Journal of Physics and Proceedings on the Indian Association for the Cultivation of Science
No full textImpacts of the 20th January 2005 solar proton event on the ozone concentration of Indian cities
No full textThe ozone data obtained from Nimbus-7 and Earth probe Total Ozone Mapping Spectrometer (TOMS) has been used to study the
impact of coronal mass ejection (CME) on the columnar ozone concentration in India. A comparison of columnar ozone values for different solar
proton events (SPE) observed at Srinagar indicates that although the 20th Jan., 2005 SPE was the most intense in the last 15 years, the ozone depletion
was found to be maximum in the 23rd March, 1991 event followed by 20th Jan., 2005, 4th Nov., 2001, 19th Oct., 1989 and 28th Oct., 2003 events. A
comparison between the ozone levels observed in different Indian cities for a few days after the 20th Jan., 2005 SPE indicates that the ozone values were
found to decrease sharply at higher latitudes compared to places located in the tropics .The ozone values measured by TOMS, Dobson Spectrometer
and AURA Ozone Monitoring Instrument (OMI) were found to decrease for a short period from 20th January to 25th January after which the ozone
levels started recovering to normal values. The vertical ozone profiles obtained from Microwave Limb Sounder for New Delhi, indicate that the ozonemixing
ratio in the 3.0 to 10.0 hPa pressure range decreased consistently from 21st Jan., 2005 to 25th Jan., 2005 and thereafter, recovered by the 31st
January, 2005.Impacts of the 20th January 2005 solar proton event on the ozone
concentration of Indian cities
Nandita D Ganguly 1* and K N Iyer 2
1 Department of Physics, St.Xavier’s College, Ahmedabad-380 009, Gujarat, India
2 Department of Physics, Saurashtra University, Rajkot-360 005, Gujarat, India
E–mail: [email protected]
Received 1 December 2005, accepted 27 February 20061 Department of Physics, St.Xavier’s College, Ahmedabad-380 009, Gujarat, India
2 Department of Physics, Saurashtra University, Rajkot-360 005, Gujarat, Indi