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Tropopause and total ozone at mid‐latitudes

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Total ozone (TOZ) data and vertical temperature profiles, derived from 12728 free‐balloon ascents and ground‐based or space‐borne instrumentation during 1984–2002 were analysed to investigate the association between TOZ and tropopause height variations above Athens, Greece. It was found that the synoptic pattern of TOZ is highly variable and the observed short‐term variability of TOZ partially reflects the fluctuations in tropopause height. In addition, the long‐term relation between tropopause height and TOZ variabilities shows that any decrease in TOZ is always accompanied by an increase in tropopause height, with a rate of – 8.5 Dobson unit (DU) km −1 in summer and −11.2DUkm −1 in winter. The linear regression analysis of the de‐seasonalized monthly mean TOZ and tropopause height, indicates a long‐term decrease in TOZ of −7.54±0.99DU per decade, and an increase in tropopause height of approximately 167±30m per decade.

Document Type: Research Article


Affiliations: Ozone and Solar Ultraviolet Radiation Research Team, Faculty of Physics, University of Athens, Panepistimiopolis, Athens 157 84, Greece

Publication date: August 20, 2005

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