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IJRSP Vol.35(5) [October 2006] >


Title: Seasonal and solar activity variation of NO2 over Ahmedabad
Authors: Chakrabarty, D K
Patel, Shailesh
Vala, Prakash
Keywords: Nitrogen dioxide
Nitrogen dioxide column density
Absorption spectrum
Sunlight absorption
Issue Date: Oct-2006
Publisher: CSIR
Abstract: Nitrogen dioxide, NO2, has strong absorption signatures in 436-448 nm region. Using this property, column density of this species has been determined at Ahmedabad, a low latitude station. Absorption spectrum has been measured by a ground-based spectroscopy technique during twilight period. Scattered zenith sunlight has been used as the source of light. The twilight slant column density (SCD) values have been found to be ~ 1017 cm–2. A summer maximum and a winter minimum, and a decreasing trend of NO2 with an increase of solar activity level are seen. These results have been compared with the UARS and GOME satellite values.
Page(s): 344-348
ISSN: 0367-8393
Source:IJRSP Vol.35(5) [October 2006]

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