Atmospheric Chemistry and Physics Discussions
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10
1
2010
10.5194/acpd-10-1457-2010
http://www.atmos-chem-phys-discuss.net/10/1457/2010/
http://www.atmos-chem-phys-discuss.net/10/1457/2010/acpd-10-1457-2010.html
http://www.atmos-chem-phys-discuss.net/10/1457/2010/acpd-10-1457-2010.pdf
1457
1481
2010-01-20
Climatology and comparison of ozone from ENVISAT/GOMOS and SHADOZ/balloon-sonde observations in the southern tropics
N. Mze
nahoudha.mze@univ-reunion.fr
A. Hauchecorne
H. Bencherif
F. Dalaudier
J.-L. Bertaux
Laboratoire de l'Atmosphère et des Cyclones, Université de la Réunion, CNRS-INSU, UMR8105, St-Denis, Reunion Island, France
Laboratoire Atmosphères, Milieux, Observations Spatiales, Université Versailles St-Quentin, CNRS-INSU, Verrières-le-Buisson, France
In this paper, the stellar occultation instrument GOMOS is compared
with ozonesondes from the SHADOZ network. We only used nighttime
O<sub>3</sub> profiles and a requirement selection at 8 Southern
Hemisphere stations. 7 years of GOMOS datasets (GOPR 6.0cf and IPF
5.0) and 11 years of balloon-sondes are used in this study. A monthly
distribution of GOMOS O<sub>3</sub> mixing ratios is performed in the
upper-troposphere and in the stratosphere (15–50 km). A comparison
with SHADOZ is done in the altitude range from 15 km to 30 km.
<br><br>
In the 21–30 km altitude range, a satisfactory agreement is observed
between GOMOS and SHADOZ although some differences are observed
depending on the station. The range for monthly differences is
generally decreasing with increasing height and is within ±15%. It is found that the agreement between GOMOS and SHADOZ
degrades below ~20 km. The median differences are nearly within
±5% particularly above 23 km. But a large positive bias is
found below 21 km compared to SHADOZ.
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