mike newchurch atmospheric science department university of alabama in huntsville

1Mike3/papers/tropoz/aguf98 12/2/98 16:30

Upper-Stratospheric Ozone Trends

Presented at

IOC/SPARCWorkshop for Understanding Ozone Trends

University of MarylandMarch 7-9, 2001

Mike NewchurchAtmospheric Science Department

University of Alabama in HuntsvilleAtmospheric Chemistry Division

[email protected]

Derek CunnoldEun-Su Yang

Georgia Tech


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


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 MARCH Figs.

All Science Figs.


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


HALOE Ozone Trends

• HALOE V19 Ozone Trends 1991-2000

• SAGE II V6.0 Trends over HALOE period (1991-2000)

• Recovery Statistics


HALOE HF and HCl Trends

• HALOE HF Trends

• HALOE HF Residuals and Recovery Statistics

• HALOE HCl Trends

• HALOE HCl Residuals and Recovery Statistics


Total Ozone Trends from Stolarski’s Merged SBUV/TOMS Dataset.

• Global trends

• Residuals and recovery Histograms

mike newchurch atmospheric science department university of alabama in huntsville

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