under a Creative Commons License. Atmospheric Chemistry and Physics The total ozone field separated into meteorological regimes – Part II: Northern Hemisphere mid-latitude total ozone trends

• Main Authors: R. D. Hudson, M. F. Andrade, M. B. Follette, A. D. Frolov
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2006
• Subjects: Arctic
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.384.9810; http://hal.archives-ouvertes.fr/docs/00/29/71/95/PDF/acp-6-5183-2006.pdf

Abstract. Previous studies have presented clear evidence that the Northern Hemisphere total ozone field can be separated into distinct regimes (tropical, midlatitude, polar, and arctic) the boundaries of which are associated with the subtropical and polar upper troposphere fronts, and in the winter, the polar vortex. This paper presents a study of total ozone variability within these regimes, from 1979–2003, using data from the TOMS instruments. The change in ozone within each regime for the period January 1979–May 1991, a period of rapid total ozone change, was studied in detail. Previous studies had observed a zonal linear trend of −3.15% per decade for the latitude band 25 ◦ –60 ◦ N. When the ozone field is separated by regime, linear trends of −1.4%, 2.3%, and 3.0%, per decade for the tropical, midlatitude, and polar regimes, respectively, are observed. The changes in the relative