Signature of early ozone hole recovery during 2002

摘要

Total column ozone has been measured using Microtop Sunphotometer at Maitri (70 degree 45'S, 11 degree 44'E), Antarctica during the 21st Indian Antarctic Scientific Expedition. Observations show that the ozone hole in the year 2002 was not as deep as that of the previous few years. The minimum value of total ozone of about 185 DU was observed in the last week of September during 2002 and 135 DU during 1997. Observations also reveal the early recovery of ozone hole during 2002 compared to 1997. The Maitri observations were also compared with TOMs data as well as a nearby Russian station data and were found to be in good agreement.