Abstract
GEOPHYSICAL RESEARCH LETTERS,
VOL. 29,
1451,
4 PP., 2002
doi:10.1029/2002GL014716
Trend analysis of upper stratospheric Umkehr ozone data for evidence of turnaround
Department of Statistics, University of Wisconsin, Madison, WI, USA
Recent upper stratospheric (∼35–45 km) Umkehr ozone data from three high-quality stations have been examined, with residual and change-in-trend analyses performed. These data show a consistent feature of mildly positive tendency in values for the recent several years. Trend analyses of these data yield significant positive change-in-trend estimates of about 0.75% per year since 1996 relative to negative trends of about −0.55% per year existing prior to 1996, leading to a (nonsignificant) estimate of about 0.2% per year positive trend for the recent 5-year period since the 1996 change-in-trend date.
Published 28 May 2002.
Citation: (2002), Trend analysis of upper stratospheric Umkehr ozone data for evidence of turnaround, Geophys. Res. Lett., 29(10), 1451, doi:10.1029/2002GL014716.
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