• Effect of cloud occurrences on tropospheric ozone over Alipore (22.52°N, 88.33°E), India

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    • Keywords


      Tropospheric ozone; cloud occurrences; surface solar radiation.

    • Abstract


      The paper presents the nature of annual cycles of tropospheric ozone, cloud occurrences, NO2, rainfall, SO2, SPM, CO, non-methane hydrocarbon and surface solar radiation for the period October 2004 to June 2009 over Alipore (22.52°N, 88.33°E), India. Annual cycle of low-level cloud occurrences depicts that the low-level cloud over Alipore had been noticed to occur for many days and nights, particularly from June to September. The low-level cloud occurrences were found in winter months and post-monsoon period. The effect of cloud occurrences on tropospheric ozone concentration has been critically analysed and explained. It has been observed that the concentration of ozone is oscillatory with cloud occurrences and has a slight linear decreasing trend with the increase of cloud occurrences and vice versa. The concentration of tropospheric ozone attained higher value at moderate cloud occurrences and comparatively lower value at both of the lower and higher cloud occurrences. The related possible chemical and physical explanation for role of cloud occurrences on tropospheric ozone has been offered.

    • Author Affiliations


      P K Jana1 D Sarkar2 D K Saha3 S K Midya4

      1. Department of Chemistry, Government College of Education, Banipur, North-24, Parganas 743 233, India.
      2. Department of Chemistry, Howrah Zilla School, Howrah 711 101, India.
      3. Department of Chemistry, Dinabandhu Mahavidyalaya, Bangaon, North-24, Parganas 743 235, India.
      4. Department of Atmospheric Science, University of Calcutta, 51/2, Hazra Road, Kolkata 700 019, India.
    • Dates

  • Journal of Earth System Science | News

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      Posted on July 25, 2019

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