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Characteristics of the ozone decline over both hemispheres.

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Title: Characteristics of the ozone decline over both hemispheres.
Authors: Balis, Dimitris1 (AUTHOR) balis@auth.gr, Bojkov, Rumen1 (AUTHOR), Tourpali, Kleareti1 (AUTHOR), Zerefos, Christos2 (AUTHOR)
Source: International Journal of Remote Sensing. Aug2009, Vol. 30 Issue 15/16, p3887-3895. 9p. 1 Chart, 4 Graphs, 1 Map.
Subjects: Ozone-depleting substances, Stratosphere, Seasons, Oxygen, Ozone, Meteorology, Temperature
Geographic Terms: Antarctica, Arctic regions
Abstract: The ozone decline in both hemispheres accelerated up to the 1990s. A number of interesting facts are presented that use objective characteristics, such as ozone mass deficiencies (O3MD) from the pre-1976 averages. In the mid-1990s the major decline in the lower stratosphere was better understood and the essential role of the stratospheric temperature and dynamics affecting the Arctic ozone decline was confirmed. In 1993 and 1995 in the northern latitudes (>35°N) the cumulative winter-spring O3MD was surpassing the deficiencies over Antarctica for the corresponding season. Total ozone deficiencies of 4-6% from pre-1976 averages continue to be observed over extra-tropical latitudes. There is no decline in the tropics only (25°N-25°S). The decline is much stronger in winter-spring than in the summer season and is very much influenced by the meteorological conditions at nearly equal concentrations of ozone depleting substances. The largest spring O3MD over Antarctica was in 2006; the intensity of the loss per unit surface within <220 DU area increased during the past decade and there are no signs of reduction of the ozone losses there. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:The ozone decline in both hemispheres accelerated up to the 1990s. A number of interesting facts are presented that use objective characteristics, such as ozone mass deficiencies (O3MD) from the pre-1976 averages. In the mid-1990s the major decline in the lower stratosphere was better understood and the essential role of the stratospheric temperature and dynamics affecting the Arctic ozone decline was confirmed. In 1993 and 1995 in the northern latitudes (>35°N) the cumulative winter-spring O3MD was surpassing the deficiencies over Antarctica for the corresponding season. Total ozone deficiencies of 4-6% from pre-1976 averages continue to be observed over extra-tropical latitudes. There is no decline in the tropics only (25°N-25°S). The decline is much stronger in winter-spring than in the summer season and is very much influenced by the meteorological conditions at nearly equal concentrations of ozone depleting substances. The largest spring O3MD over Antarctica was in 2006; the intensity of the loss per unit surface within <220 DU area increased during the past decade and there are no signs of reduction of the ozone losses there. [ABSTRACT FROM AUTHOR]
ISSN:01431161
DOI:10.1080/01431160902821981