Articles | Volume 7, issue 6
Atmos. Meas. Tech., 7, 1681–1692, 2014

Special issue: Changes in the vertical distribution of ozone – the SI2N report...

Atmos. Meas. Tech., 7, 1681–1692, 2014

Research article 11 Jun 2014

Research article | 11 Jun 2014

Comparison of profile total ozone from SBUV (v8.6) with GOME-type and ground-based total ozone for a 16-year period (1996 to 2011)

E. W. Chiou1, P. K. Bhartia2, R. D. McPeters2, D. G. Loyola3, M. Coldewey-Egbers3, V. E. Fioletov4, M. Van Roozendael5, R. Spurr6, C. Lerot5, and S. M. Frith7 E. W. Chiou et al.
  • 1ADNET Systems, Inc., Lanham, MD 20706, USA
  • 2NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
  • 3German Aerospace Center (DLR), Oberpfaffenhofen, Germany
  • 4Environment Canada, North York, Ontario, Canada
  • 5Belgian Institute for Space Aeronomy, Brussels, Belgium
  • 6RT Solutions, Inc., Cambridge, MA 02138, USA
  • 7Science Systems and Applications, Inc., Lanham, MD 20706, USA

Abstract. This paper describes the comparison of the variability of total column ozone inferred from the three independent multi-year data records, namely, (i) Solar Backscatter Ultraviolet Instrument (SBUV) v8.6 profile total ozone, (ii) GTO (GOME-type total ozone), and (iii) ground-based total ozone data records covering the 16-year overlap period (March 1996 through June 2011). Analyses are conducted based on area-weighted zonal means for 0–30° S, 0–30° N, 50–30° S, and 30–60° N.

It has been found that, on average, the differences in monthly zonal mean total ozone vary between −0.3 and 0.8 % and are well within 1%.

For GTO minus SBUV, the standard deviations and ranges (maximum minus minimum) of the differences regarding monthly zonal mean total ozone vary between 0.6–0.7% and 2.8–3.8% respectively, depending on the latitude band. The corresponding standard deviations and ranges regarding the differences in monthly zonal mean anomalies show values between 0.4–0.6% and 2.2–3.5%. The standard deviations and ranges of the differences ground-based minus SBUV regarding both monthly zonal means and anomalies are larger by a factor of 1.4–2.9 in comparison to GTO minus SBUV.

The ground-based zonal means demonstrate larger scattering of monthly data compared to satellite-based records. The differences in the scattering are significantly reduced if seasonal zonal averages are analyzed.

The trends of the differences GTO minus SBUV and ground-based minus SBUV are found to vary between −0.04 and 0.1% yr−1 (−0.1 and 0.3 DU yr−1). These negligibly small trends have provided strong evidence that there are no significant time-dependent differences among these multi-year total ozone data records.

Analyses of the annual deviations from pre-1980 level indicate that, for the 15-year period of 1996 to 2010, all three data records show a gradual increase at 30–60° N from −5% in 1996 to −2% in 2010. In contrast, at 50–30° S and 30° S–30° N there has been a levelling off in the 15 years after 1996. The deviations inferred from GTO and SBUV show agreement within 1%, but a slight increase has been found in the differences during the period 1996–2010.