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| Titel |
Global and long-term comparison of SCIAMACHY limb ozone profiles with correlative satellite data (2002–2008) |
| VerfasserIn |
S. Mieruch, M. Weber, C. Savigny, A. Rozanov, H. Bovensmann, J. P. Burrows, P. F. Bernath, C. D. Boone, L. Froidevaux, L. L. Gordley, M. G. Mlynczak, J. M. Russell III, L. W. Thomason, K. A. Walker, J. M. Zawodny |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 5, no. 4 ; Nr. 5, no. 4 (2012-04-20), S.771-788 |
| Datensatznummer |
250002778
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| Publikation (Nr.) |
 copernicus.org/amt-5-771-2012.pdf |
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| Zusammenfassung |
| SCIAMACHY limb scatter ozone profiles from 2002 to 2008 have been
compared with MLS (2005–2008), SABER (2002–2008), SAGE II (2002–2005),
HALOE (2002–2005) and ACE-FTS (2004–2008) measurements. The comparison
is performed for global zonal averages and heights from 10 to 50 km in
one km steps. The validation was performed by comparing monthly mean
zonal means and by comparing averages over collocated profiles within a
zonal band and month. Both approaches yield similar results. For most of
the stratosphere SCIAMACHY agrees to within 10% or better with other
correlative data. A systematic bias of SCIAMACHY ozone of up to 100%
between 10 and 20 km in the tropics points to some remaining issues with
regard to convective cloud interference. Statistical hypothesis testing
reveals at which altitudes and in which region differences between
SCIAMACHY and other satellite data are statistically significant. We
also estimated linear trends from monthly mean data for different
periods where SCIAMACHY has common observations with other satellite
data using a classical trend model with QBO and seasonal terms in order
to draw conclusions on potential instrumental drifts as a function of
latitude and altitude. Since the time periods considered
here are rather short these trend estimates are only used to identify
potential instrumental issues with the SCIAMACHY data. As a result
SCIAMACHY exhibits a statistically significant negative trend in the
range of of about 1–3% per year depending on latitude during the
period 2002–2005 (overlapping with HALOE and SAGE II) and somewhat less
during 2002–2008 (overlapping with SABER) in the altitude range of
30–40 km, while in the period 2004–2008 (overlapping with MLS and
ACE-FTS) no significant trends are observed. Since all
correlative satellite instruments do not show to a very large extent
statistically significant trends in any of the time periods considered
here, the negative trends observed with SCIAMACHY data
point at some remaining instrumental artifact
which is most likely related to residual errors in the
tangent height registration of SCIAMACHY. |
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