Physics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jastp..73.2305n&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 73, Issue 16, p. 2305-2313.
Physics
Scientific paper
Long-term trend of total column ozone at high altitude region in Ladakh is studied, using a total ozone mapping spectrometer and an ozone monitoring instrument during 1979-2008. In the region, total ozone exhibits seasonality with maximum in spring and minimum in autumn. The decreasing trend of total ozone was found as -2.51±0.45% per decade with 95% confidence level in the region. Ozone deficiency in the Ladakh region is strongest (-33.9 DU at Hanle) in May and weakest (-11.5 DU at Hanle) in January-February. In the study, the solar maximum in 1990 is in phase with ozone maximum, while ozone variation lags in phase with the 1980 and 2000 solar maxima. However, a significant correlation between total ozone and sunspot number is achieved in the westerly phase of quasi-biennial oscillation during spring season. Decreasing trend of ozone in the region is correlating well with the cooling rate in the lower stratosphere.
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