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| Titel |
Simultaneous trace gas measurements using two Fourier transform spectrometers at Eureka, Canada during spring 2006, and comparisons with the ACE-FTS |
| VerfasserIn |
D. Fu, K. A. Walker, R. L. Mittermeier, K. Strong, K. Sung, H. Fast, P. F. Bernath, C. D. Boone, W. H. Daffer, P. Fogal, F. Kolonjari, P. Loewen, G. L. Manney, O. Mikhailov, J. R. Drummond |
| 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 ; 11, no. 11 ; Nr. 11, no. 11 (2011-06-09), S.5383-5405 |
| Datensatznummer |
250009809
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| Publikation (Nr.) |
 copernicus.org/acp-11-5383-2011.pdf |
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| Zusammenfassung |
| The 2006 Canadian Arctic ACE (Atmospheric Chemistry Experiment)
Validation Campaign collected measurements at the Polar Environment
Atmospheric Research Laboratory (PEARL, 86.42° W,
80.05° N, 610 m a.s.l.) at Eureka, Canada from
17 February to 31 March 2006. Two of the ten instruments involved in
the campaign, both Fourier transform spectrometers (FTSs), were
operated simultaneously, recording atmospheric solar absorption spectra.
The first instrument was an ABB Bomem DA8 high-resolution infrared FTS.
The second instrument was the Portable Atmospheric Research
Interferometric Spectrometer for the Infrared (PARIS-IR), the ground-based
version of the satellite-borne FTS on the ACE satellite (ACE-FTS). From the
measurements collected by these two ground-based instruments, total
column densities of seven stratospheric trace gases (O3, HCl, ClONO2,
HF, HNO3, NO2, and NO) were retrieved using the optimal estimation
method and these results were compared. Since the two instruments sampled
the same portions of atmosphere by synchronizing observations during the
campaign and used consistent retrieval parameters, the biases in retrieved
columns from the two spectrometers
represent the instrumental differences. Mean differences in total column
densities of O3, HCl, ClONO2, HF, HNO3, and NO2 from the
observations between PARIS-IR and the DA8 FTS are 2.8 %, −3.2 %, −4.3 %, −1.5 %, −1.9 %, and −0.1 %, respectively. Partial column results from the
ground-based spectrometers were also compared with partial columns
derived from ACE-FTS version 2.2 (including updates for O3) profiles. Mean
differences in partial column densities of O3, HCl, ClONO2, HF,
HNO3, NO2, and NO from the measurements between ACE-FTS and
the DA8 FTS are −5.9 %, −8.5 %, −11.8 %, −0.9 %, −6.6 %, −21.6 % and −7.6 %
respectively. Mean differences in partial column densities of O3, HCl,
ClONO2, HF, HNO3, NO2 from the measurements between
ACE-FTS and the PARIS-IR are −5.2 %, −4.6 %, −2.3 %, −4.7 %, 5.7 % and −11.9 %,
respectively. This work provides further evidence of the reliability of ACE-FTS
measurements from the first three years of on-orbit observations. Column
densities of O3, HCl, ClONO2, and HNO3 from the three FTSs were normalized
with respect to HF and used to compare the time evolution of the chemical
constituents in the atmosphere over Eureka during spring 2006. |
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