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http://nopr.niscpr.res.in/handle/123456789/17463| Title: | Vertical profile variations of NO2 and O3 using slant column density observations during twilight period |
| Authors: | Londhe, A L Bhosale, C S Meena, G S Jadhav, D B Gil, M Puentedura, O Yela, M |
| Issue Date: | Dec-1999 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | An algorithm developed to derive the vertical profiles of atmospheric species from their slant column density measurements using twilight spectroscopy is discussed. The algorithm has been tested by using the slant column density measurements at polar station, Reykjavik (64°N, 22.6°W) and tropical station, Pune (l8.53°N, 73.85°E). The vertical profiles of NO2 and O3 are retrieved by considering slant column densities for ten different solar zenith angles and ten different atmospheric layers of equal thickness. These vertical profiles are used to differentiate the tropospheric and stratospheric contribution of NO2 and O3 . The observations of NO2 at polar station and at tropical station showed frequent higher values of tropospheric concentrations due to pollution episodes and are not correlated with stratospheric NO2 and O3. The correlation between total column density variations of NO2 and O3 is not observed; however, the stratospheric variations of NO2 and O3 showed good correlation. |
| Page(s): | 291-301 |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Appears in Collections: | IJRSP Vol.28(6) [December 1999] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJRSP 28(6) 291-301.pdf | 2.09 MB | Adobe PDF | View/Open |
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