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Title: On the variation of the tropospheric ozone over Indian region in relation to the meteorological parameters
Authors: Patil SD
Thompson B
Revadekar JV
Keywords: Deep convection;Ecological systems;Geopotential height;In-phase;Meteorological parameters;Negative correlation;Outgoing longwave radiation;Ozone precursors;Photochemical production;Positive correlations;Satellite measurements;Seasonal variability;Summer monsoon;Tropospheric ozone, Clouds;Global warming;Greenhouse gases;Troposphere, Ozone, emission;geopotential;greenhouse gas;longwave radiation;meteorology;monsoon;ozone;photochemistry;satellite data;seasonal variation;troposphere, Asia;Eurasia;India;South Asia
Issue Date: 2009
Publisher: International Journal of Remote Sensing
Taylor and Francis
Source: Volume no: 30
Issue no: 11
Project: 2015
Abstract: Using monthly mean satellite measurements of TOMS/SBUV tropospheric ozone residual (TOR) data and meteorological parameters (tropopause height (TPH), 200-hPa 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 (44-48-DU, which is higher than the globally averaged 31.5-DU) 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, 200-hPa 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 CH 4 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.
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