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Mike Newchurch Atmospheric Science Department University of Alabama in Huntsville

Upper-Stratospheric Ozone Trends Presented at IOC/SPARC Workshop for Understanding Ozone Trends University of Maryland March 7-9, 2001. Mike Newchurch Atmospheric Science Department University of Alabama in Huntsville Atmospheric Chemistry Division NCAR mike@nsstc.uah.edu Derek Cunnold

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Mike Newchurch Atmospheric Science Department University of Alabama in Huntsville

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  1. Upper-Stratospheric Ozone TrendsPresented atIOC/SPARCWorkshop for Understanding Ozone TrendsUniversity of MarylandMarch 7-9, 2001 Mike Newchurch Atmospheric Science Department University of Alabama in Huntsville Atmospheric Chemistry Division NCAR mike@nsstc.uah.edu Derek Cunnold Eun-Su Yang Georgia Tech

  2. Outline • Upper Stratospheric Ozone Trends from SAGE(I/II), SBUV(/2), Umkehr through 1978-1998 • SAGE II V6.0 Trends and Recovery Histograms 1984-2000 • HALOE Ozone Trends 1991-2000 • HALOE HF and HCl Trends 1991-2000 • Total Ozone Trends and Recovery Histograms from Stolarski’s merged dataset 1978-2000

  3. Upper Stratospheric OzoneTrends from SAGE(I/II), SBUV(/2), Umkehrthrough 1998 • Results of the previous IOC/SPARC Trends Assessment through 1998 published in JGR and Science. • Newchurch, M.J., L. Bishop, D.M. Cunnold, L.E. Flynn, S. Godin, S.H. Frith, L. Hood, A.J. Miller, S. Oltmans, W. Randel, G. Reinsel, R. Stolarski, R. Wang, E.S. Yang, and J.M. Zawodny, Upper-stratospheric ozone trends 1979-1998, J. Geophys. Res., 105, 14,625-14,636, 2000a. • Randel, W.J., R.S. Stolarski, D.M. Cunnold, J.A. Logan, M.J. Newchurch, and J.M. Zawodny, Trends in the Vertical Distribution of Ozone, Science, 285, 1689-1692, 1999. • Comparison of stratospheric ozone trends from Arosa Umkehr observations 1979-1996 and 1996-2000 by Standard and MARCH models: MARCH error bars are smaller. • Newchurch, M.J., E.S. Yang, D.M. Cunnold, J. Staehelin, H. Jaeger, and A.K. Weiss, A multivariate auto-regressive combined-harmonics time-series analysis of Dobson Umkehr ozone profiles at Arosa, Switzerland, 1979-1996, J. of Climate, Submitted, 2000b. All JGR Figs. All Science Figs. All MARCH Figs.

  4. SAGE II V6.0 Trends and Recovery Histograms • SAGE II V6.0 Ozone Trends • SAGE II V6.0 Recovery statistics • SAGE II V6.0 QBO signal

  5. HALOE Ozone Trends • HALOE V19 Ozone Trends 1991-2000 • SAGE II V6.0 Trends over HALOE period (1991-2000) • Recovery Statistics

  6. HALOE HF and HCl Trends • HALOE HF Trends • HALOE HF Residuals and Recovery Statistics • HALOE HCl Trends • HALOE HCl Residuals and Recovery Statistics

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