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| Titel |
Technical Note: New ground-based FTIR measurements at Ile de La Réunion: observations, error analysis, and comparisons with independent data |
| VerfasserIn |
C. Senten, M. Mazière, B. Dils, C. Hermans, M. Kruglanski, E. Neefs, F. Scolas, A. C. Vandaele, G. Vanhaelewyn, C. Vigouroux, M. Carleer, P. F. Coheur, S. Fally, B. Barret, J. L. Baray, R. Delmas, J. Leveau, J. M. Metzger, E. Mahieu, C. Boone, K. A. Walker, P. F. Bernath, K. Strong |
| 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 ; 8, no. 13 ; Nr. 8, no. 13 (2008-07-02), S.3483-3508 |
| Datensatznummer |
250006267
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| Publikation (Nr.) |
 copernicus.org/acp-8-3483-2008.pdf |
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| Zusammenfassung |
| Ground-based high spectral resolution Fourier-transform infrared (FTIR)
solar absorption spectroscopy is a powerful remote sensing technique to
obtain information on the total column abundances and on the vertical
distribution of various constituents in the atmosphere. This work presents
results from two FTIR measurement campaigns in 2002 and 2004, held at Ile de
La Réunion (21° S, 55° E). These campaigns represent the first
FTIR observations carried out at a southern (sub)tropical site. They serve
the initiation of regular, long-term FTIR monitoring at this site in the
near future. To demonstrate the capabilities of the FTIR measurements at
this location for tropospheric and stratospheric monitoring, a detailed
report is given on the retrieval strategy, information content and
corresponding full error budget evaluation for ozone (O3), methane
(CH4), nitrous oxide (N2O), carbon monoxide (CO), ethane
(C2H6), hydrogen chloride (HCl), hydrogen fluoride (HF) and nitric
acid (HNO3) total and partial column retrievals. Moreover, we have made
a thorough comparison of the capabilities at sea level altitude (St.-Denis)
and at 2200 m a.s.l. (Maïdo). It is proved that the performances of the
technique are such that the atmospheric variability can be observed, at both
locations and in distinct altitude layers. Comparisons with literature and
with correlative data from ozone sonde and satellite (i.e., ACE-FTS, HALOE
and MOPITT) measurements are given to confirm the results. Despite the short
time series available at present, we have been able to detect the seasonal
variation of CO in the biomass burning season, as well as the impact of
particular biomass burning events in Africa and Madagascar on the
atmospheric composition above Ile de La Réunion. We also show that
differential measurements between St.-Denis and Maïdo provide useful
information about the concentrations in the boundary layer. |
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