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On the variation of the tropospheric ozone over Indian region in relation to the meteorological parameters
Stockholm University.
2009 (English)In: International Journal of Remote Sensing, ISSN 0143-1161, E-ISSN 1366-5901, Vol. 30, no 11, 2813-2826 p.Article in journal (Refereed) Published
Abstract [en]

Using monthly mean satellite measurements of TOMS/SBUV tropospheric ozone residual (TOR) data and meteorological parameters (tropopause height (TPH), 200hPa geopotential height (GPH) and outgoing longwave radiation (OLR)) during 1979-2001, seasonal variability of TOR data and their association with meteorological parameters are outlined over the Indian region. Prominent higher values of TOR (44-48DU, which is higher than the globally averaged 31.5DU) are observed over the northern parts of the country during the summer monsoon season (June-September). Similar to the TOR variation, meteorological parameters (tropopause height, 200hPa geopotential height and outgoing longwave radiation) also show higher values during the summer monsoon season, suggesting an in phase relationship and strong association between them because of deep convection present during summer monsoon time. The monthly trends in TOR values are found to be positive over the region. TOR has significant positive correlations (5% level) with GPH, and negative correlations with OLR and TPH for the month of September. The oxidation chains initiated by CH4 and CO show the enhanced photochemical production of ozone that would certainly become hazardous to the ecological system. Interestingly, greenhouse gases (GHG) emissions were found to have continuously increased over the Indian region during the period 1990-2000, indicating more anthropogenic production of ozone precursor gases causing higher level of tropospheric ozone during this period.

Place, publisher, year, edition, pages
2009. Vol. 30, no 11, 2813-2826 p.
Keyword [en]
solar ultraviolet-radiation, toms measurements, column ozone, carbon-monoxide, surface ozone, st-petersburg, hole split, trends, variability, satellite
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:su:diva-60054DOI: 10.1080/01431160802555861ISI: 000267263000006OAI: oai:DiVA.org:su-60054DiVA: diva2:433750
Note
authorCount :3Available from: 2011-08-11 Created: 2011-08-08 Last updated: 2017-12-08Bibliographically approved

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