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Ozone layer depletion levelling off

21 September 2009

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Merged total ozone from GOME, SCIAMACHY and GOME-2 from June 1995 until May 2009.

Credits: Diego Loyola, DLR

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Monthly mean total ozone averaged over 60°N to 60°S from the merged GOME, SCIAMACHY and GOME-2 datasets (solid lines). The original datasets (dashed lines) before the adjustment are plotted for comparison.

Credits: Diego Loyola, DLR

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Upper stratospheric (35-45km) ozone anomalies for six instruments at northern mid-latitudes (30N–60N). Shown are SAGE I+II (blue, A), SBUV/2 (orange, B), UARS/HALOE (red, C), Odin/SMR (magenta, D), Odin/OSIRIS (black, E), and Envisat/SCIAMACHY (cian, F). Also shown under-laid is the all instrument average (green). Thin black lines indicate the fitted trends before and after 1997.

Citation: Based on slide by Jo Urban, adapted from A. Jones, J. Urban, D.P. Murtagh, P. Eriksson, S. Brohede, C. Haley, D. Degenstein, A. Bourassa, C. von Savigny, T. Sonkaew, A. Rozanov, H. Bovensmann, and J. Burrows, Evolution of stratospheric ozone and water vapour time series studied with satellite measurements, Atmos. Chem. Phys., 9, 6055–6075, 2009

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Time series of monthly averaged BrO column abundances measured over Harestua (60°N, 11°E) by SCIAMACHY limb (right) and ground-based UV-visible (left) instruments. Thick lines indicate trend analysis results. A decline of -0.6+/-0.3% per year is estimated from SCIAMACHY limb observations over the 2002-2008 period, which is in good agreement with ground-based UV-visible measurements (-0.7+/-0.3%/year).

Credits: F. Hendrick (BIRA/IASB) and A. Rozanov (IUP/IFE-Bremen), 2009