 |
| Titel |
Intercomparison of polar ozone profiles by IASI/MetOp sounder with 2010 Concordiasi ozonesonde observations |
| VerfasserIn |
J. Gazeaux, C. Clerbaux, M. George, J. Hadji-Lazaro, J. Kuttippurath, P.-F. Coheur, D. Hurtmans, T. Deshler, M. Kovilakam, P. Campbell, V. Guidard, F. Rabier, J.-N. Thépaut |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1867-1381
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 6, no. 3 ; Nr. 6, no. 3 (2013-03-08), S.613-620 |
| Datensatznummer |
250017835
|
| Publikation (Nr.) |
 copernicus.org/amt-6-613-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| Validation of ozone profiles measured from a nadir looking satellite
instrument over Antarctica is a challenging task due to differences in their
vertical sensitivity with ozonesonde measurements. In this paper, ozone
observations provided by the Infrared Atmospheric Sounding Interferometer
(IASI) instrument onboard the polar-orbiting satellite MetOp are compared
with ozone profiles collected between August and October 2010 at McMurdo
Station, Antarctica, during the Concordiasi measurement campaign. The main
objective of the campaign was the satellite data validation. With this aim 20
zero-pressure sounding balloons carrying ozonesondes were launched during
this period when the MetOp satellite was passing above McMurdo. This makes
the dataset relevant for comparison, especially because the balloons covered
the entire altitude range of IASI profiles. The validation methodology and
the collocation criteria vary according to the availability of global
positioning system auxiliary data with each electro-chemical cell ozonesonde
observation. The relative mean difference is shown to depend on the vertical
range investigated. The analysis shows a good agreement in the troposphere
(below 10 km) and middle stratosphere (25–40 km), where the differences
are lower than 10%. However a significant positive bias of about
10–26% is estimated in the lower stratosphere at 10–25 km, depending on
altitude. The positive bias in the 10–25 km range is consistent with
previously reported studies comparing in situ data with thermal infrared
satellite measurements. This study allows for a better characterization of
IASI-retrieved ozone over the polar region during ozone depletion/recovery
processes. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|