 |
| Titel |
Comparison of OMI ozone and UV irradiance data with ground-based measurements at two French sites |
| VerfasserIn |
V. Buchard, C. Brogniez, F. Auriol, B. Bonnel, J. Lenoble, A. Tanskanen, B. Bojkov, P. Veefkind |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 8, no. 16 ; Nr. 8, no. 16 (2008-08-05), S.4517-4528 |
| Datensatznummer |
250006315
|
| Publikation (Nr.) |
 copernicus.org/acp-8-4517-2008.pdf |
|
|
|
|
|
| Zusammenfassung |
| Ozone Monitoring Instrument (OMI), launched in July 2004, is dedicated to
the monitoring of the Earth's ozone, air quality and climate. OMI is the
successor of the Total Ozone Mapping Spectrometer (TOMS) instruments and
provides among other atmospheric and radiometric quantities the total column
of ozone (TOC), the surface ultraviolet (UV) irradiance at several
wavelengths, the erythemal dose rates and the erythemal daily doses. The
main objective of this work is to compare OMI data with data from
ground-based instruments in order to use OMI products (collection 2) for
scientific studies. The Laboratoire d'Optique Atmosphérique (LOA)
located in Villeneuve d'Ascq (VdA) in the north of France performs solar UV
measurements using a spectroradiometer. The site of Briançon in the
French Southern Alps is also equipped with a spectroradiometer operated by
Interaction Rayonnement Solaire Atmosphère (IRSA). The OMI total ozone
column data is obtained from the OMI-TOMS and OMI-DOAS algorithms. The
comparison between the TOC retrieved with ground-based measurements and
OMI-TOMS data shows good agreement at both sites for all sky conditions with
a relative difference for most of points better than 5%. For OMI-DOAS
data, the agreement is generally better than 7% and these data show a
significant dependence on solar zenith angle. Comparisons of spectral UV on
clear sky conditions are also satisfying with relative differences smaller
than 10% except at solar zenith angles larger than 65°. On the
contrary, results of comparisons of the erythemal dose rates and erythemal
daily doses for clear sky show that OMI overestimates surface UV doses at
VdA by about 15% and that on cloudy skies, the bias increases. At
Briançon, such a bias is observed if data corresponding to snow-covered
surface are excluded. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|