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| Titel |
Trends in stratospheric ozone derived from merged SAGE II and Odin-OSIRIS satellite observations |
| VerfasserIn |
A. E. Bourassa, D. A. Degenstein, W. J. Randel, J. M. Zawodny, E. Kyrölä, C. A. McLinden, C. E. Sioris, C. Z. Roth |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 13 ; Nr. 14, no. 13 (2014-07-09), S.6983-6994 |
| Datensatznummer |
250118875
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| Publikation (Nr.) |
 copernicus.org/acp-14-6983-2014.pdf |
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| Zusammenfassung |
| Stratospheric ozone profile measurements from the Stratospheric Aerosol and
Gas Experiment~(SAGE) II satellite instrument (1984–2005) are combined with
those from the Optical Spectrograph and InfraRed Imager System (OSIRIS)
instrument on the Odin satellite (2001–Present) to quantify interannual
variability and decadal trends in stratospheric ozone between 60° S and 60° N. These data are merged into a multi-instrument,
long-term stratospheric ozone record (1984–present) by analyzing the
measurements during the overlap period of 2002–2005 when both satellite
instruments were operational. The variability in the deseasonalized time
series is fit using multiple linear regression with predictor basis
functions including the quasi-biennial oscillation, El Niño–Southern
Oscillation index, solar activity proxy, and the pressure at the tropical
tropopause, in addition to two linear trends (one before and one after
1997), from which the decadal trends in ozone are derived. From 1984 to 1997,
there are statistically significant negative trends of 5–10% per decade
throughout the stratosphere between approximately 30 and 50 km. From
1997 to present, a statistically significant recovery of 3–8% per decade
has taken place throughout most of the stratosphere with the notable
exception between 40° S and 40° N below approximately 22 km
where the negative trend continues. The recovery is not significant between
25 and 35 km altitudes when accounting for a conservative estimate of instrument
drift. |
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