 |
| Titel |
Ozone tropospheric and stratospheric trends (1995-2012) at six ground-based FTIR stations (28°N to 79°N) |
| VerfasserIn |
Corinne Vigouroux, Martine De Mazière, Philippe Demoulin, Christian Servais, Frank Hase, Thomas Blumenstock, Matthias Schneider, Regina Kohlepp, Sabine Barthlott, Omaira Garciá, Johan Mellqvist, Glenn Persson, Mathias Palm, Justus Notholt, James Hannigan, Michael Coffey |
| Konferenz |
EGU General Assembly 2013
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250083061
|
|
|
|
|
|
| Zusammenfassung |
| In the frame of the Network for the Detection of Atmospheric Composition Change
(NDACC), contributing ground-based stations have joined their efforts to homogenize and
optimize the retrievals of ozone profiles from FTIR (Fourier transform infrared) solar
absorption spectra. Using the optimal estimation method, distinct vertical information can be
obtained in four layers: ground-10 km, 10-18 km, 18-27 km, and 27-42 km, in
addition to total column amounts. In a previous study, Vigouroux et al. (2008)1
applied a bootstrap resampling method to determine the trends of the ozone total and
four partial columns, over the period 1995-2004 at Western European stations. The
updated trends for the period 1995-2009 have been published in the WMO 2010
report2.
Here, we present the updated trends and their uncertainties, for the 1995-2012 period, for the
different altitude ranges, above five European stations (28°N-79°N) and above the station
Thule, Greenland (77°N). In this work, the trends have been estimated using a multiple
regression model including some explanatory variables responsible for the ozone variability,
such as the Quasi Biennial Oscillation (QBO), the solar flux, the Arctic Oscillation (AO) or
El Niño-Southern Oscillation (ENSO). A major result is the significant positive trend of
ozone in the upper stratosphere, observed at the Jungfraujoch (47°N), which is
a typical mid-latitude site, as well as at the high latitude stations. This positive
trend in the upper stratosphere at Jungfraujoch provides a sign of ozone recovery at
mid-latitudes.
1 Vigouroux, C., De Mazière, M., Demoulin, P., Servais, C., Hase, F., Blumenstock, T., Kramer, I.,
Schneider, M., Mellqvist, J., Strandberg, A., Velazco, V., Notholt, J., Sussmann, R., Stremme, W.,
Rockmann, A., Gardiner, T., Coleman, M., and Woods, P. : Evaluation of tropospheric and stratospheric
ozone trends over Western Europe from ground-based FTIR network observations, ACP, 8, 6865-6886,
2008.
2 Douglass, A., and Fioletov, V. (Coordinating Lead Authors), Godin-Beekmann, S., Müller, R.,
Stolarski, R., Webb, et al.: Stratospheric Ozone and Surface Ultraviolet Radiation, Chapter 2 in
Scientific Assessment of Ozone Depletion: 2010, Global Ozone Research and Monitoring
Project–Report No. 52, 516 pp., World Meteorological Organization, Geneva, Switzerland,
2011. |
|
|
|
|
|
|