Ghude, Sachin D and Singh, Sachchidanand and Kulkarni, P. S and Kumar, A. and Jain, S. L. and Singh , R. and Arya, B. C. and ., Shahnawaz (2008) Observations and model calculations of direct solar UV irradiances in the Schirmacher region of east Antarctica. International Journal of Remote Sensing, 29 (20). pp. 5907-5921. ISSN 0143-1161

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Measurements of direct UV irradiances (using a MICROTOPS II Sunphotometer) carried out from a high-latitude site, Antarctica are presented. The instantaneous irradiances at 305 +/- 0.9, 312 +/- 0.9 and 320 +/- 1.0nm during a no-ozone-hole (13 December 2004) and an ozone-hole (4 October 2004) period have been observed to be about 0.031, 0.150 and 0.299Wm(-2) and 0.010, 0.049 and 0.102Wm(-2), respectively at local noontime. The observations of the direct UV irradiances at 305 +/- 0.9, 312 +/- 0.9 and 320 +/- 1.0nm are compared with tropospheric ultraviolet visible (TUV) radiation transfer model calculations. The model estimate shows that, during the ozone-hole period, a loss of ozone of the order of 44% leads to an increase in irradiance of the order of 410%, 90% and 25% at 305 +/- 0.9, 312 +/- 0.9 and 320 +/- 1.0nm, respectively. The relationship between change in UV irradiance due to a change in column ozone is obtained using a TUV model and irradiances thus estimated from this relationship are found to compare well with the observed irradiances.

Item Type: Article
Additional Information: Copyright for this article belongs to Taylor & Francis Group.
Subjects: Imaging Science & Photographic Technology
Remote Sensing
Depositing User: Ms Neetu Chandra
Date Deposited: 20 May 2015 07:54
Last Modified: 20 May 2015 07:54

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