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| Titel |
Evaluating the potential of IASI ozone observations to constrain simulated surface ozone concentrations |
| VerfasserIn |
G. Foret, L. Hamaoui, C. Schmechtig, M. Eremenko, C. Keim, G. Dufour, A. Boynard, A. Coman, A. Ung, M. Beekmann |
| 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 ; 9, no. 21 ; Nr. 9, no. 21 (2009-11-06), S.8479-8491 |
| Datensatznummer |
250007738
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| Publikation (Nr.) |
 copernicus.org/acp-9-8479-2009.pdf |
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| Zusammenfassung |
| A tracer study has been performed for two summers in 2003 and 2004 with a
regional chemistry-transport model in order to evaluate the potential
constraint that tropospheric ozone observations from nadir viewing infrared
sounders like IASI or TES exert on modelled near surface ozone. As these
instruments show high sensitivity in the free troposphere, but low
sensitivity at ground, it is important to know how much of the information
gained in the free troposphere is transferred to ground through vertical
transport processes. Within the European model domain, and within a time
span of 4 days, only ozone like tracers initialised in vertical layers above
500 hPa are transported to the surface. For a tracer initialised between 800 and 700 hPa,
seven percent reaches the surface within one to three days, on
the average over the European model domain but more than double over the
Mediterranean Sea. For this region, trajectory analysis shows that this is
related to strong subsident transport. These results are confirmed by a
second tracer study taking into account averaging kernels related to IASI
retrievals, indicating the potential of these measurements to efficiently
constrain surface ozone values. |
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