Ozone and upper troposphere/lower stratosphere variability and change at southern midlatitudes 1980?2000: Decadal variations

PABLO O. CANZIANI; FABIO E. MALANCA; EDUARDO A. AGOSTA

AGU

Año: 2008 vol. 113 p. 1 - 1

otal ozone relationships with selected upper troposphere/lower stratosphere variables (400- and 70-hPa temperatures, tropopause height and temperature, 70-hPa geopotential height, and 340K potential vorticity), as well as between the variables, are analyzed on decadal scales over Southern Hemisphere midlatitudes for the period 1980?2000. Total Ozone Mapping Spectrometer version 8 total ozone and European Centre for Medium Range Weather Forecast ERA-40 data products for June and October (early winter and spring) are used. Multiple spatial correlation techniques and shared variance estimates are applied to infer relationships between mean fields as well as among decadal difference fields. Wave activity and local Eliassen-Palm fluxes were calculated to further analyze the dynamics of the samples and their variability. The statistical studies show that observed total ozone latitudinal and longitudinal decadal variations can be driven by upper tropospheric and stratospheric variability, de