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| Titel |
Validation of ACE-FTS v2.2 measurements of HCl, HF, CCl3F and CCl2F2 using space-, balloon- and ground-based instrument observations |
| VerfasserIn |
E. Mahieu, P. Duchatelet, P. Demoulin, K. A. Walker, E. Dupuy, L. Froidevaux, C. Randall, V. Catoire, K. Strong, C. D. Boone, P. F. Bernath, J.-F. Blavier, T. Blumenstock, M. Coffey, M. Mazière, D. Griffith, J. Hannigan, F. Hase, N. Jones, K. W. Jucks, A. Kagawa, Y. Kasai, Y. Mébarki, S. Mikuteit, R. Nassar, J. Notholt, C. P. Rinsland, C. Robert, O. Schrems, C. Senten, D. Smale, J. Taylor, C. Tetard, G. C. Toon, T. Warneke, S. W. Wood, R. Zander, C. Servais |
| 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. 20 ; Nr. 8, no. 20 (2008-10-27), S.6199-6221 |
| Datensatznummer |
250006423
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| Publikation (Nr.) |
 copernicus.org/acp-8-6199-2008.pdf |
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| Zusammenfassung |
| Hydrogen chloride (HCl) and hydrogen fluoride (HF) are respectively the main
chlorine and fluorine reservoirs in the Earth's stratosphere. Their buildup
resulted from the intensive use of man-made halogenated source gases, in
particular CFC-11 (CCl3F) and CFC-12 (CCl2F2), during the
second half of the 20th century. It is important to continue monitoring
the evolution of these source gases and reservoirs, in support of the
Montreal Protocol and also indirectly of the Kyoto Protocol. The Atmospheric
Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) is a
space-based instrument that has been performing regular solar occultation
measurements of over 30 atmospheric gases since early 2004. In this
validation paper, the HCl, HF, CFC-11 and CFC-12 version 2.2 profile data
products retrieved from ACE-FTS measurements are evaluated. Volume mixing
ratio profiles have been compared to observations made from space by MLS and
HALOE, and from stratospheric balloons by SPIRALE, FIRS-2 and Mark-IV.
Partial columns derived from the ACE-FTS data were also compared to column
measurements from ground-based Fourier transform instruments operated at 12
sites. ACE-FTS data recorded from March 2004 to August 2007 have been used
for the comparisons. These data are representative of a variety of
atmospheric and chemical situations, with sounded air masses extending from
the winter vortex to summer sub-tropical conditions. Typically, the ACE-FTS
products are available in the 10–50 km altitude range for HCl and HF, and in
the 7–20 and 7–25 km ranges for CFC-11 and -12, respectively. For both
reservoirs, comparison results indicate an agreement generally better than
5–10% above 20 km altitude, when accounting for the known offset
affecting HALOE measurements of HCl and HF. Larger positive differences are
however found for comparisons with single profiles from FIRS-2 and SPIRALE.
For CFCs, the few coincident measurements available suggest that the
differences probably remain within ±20%. |
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