Atmos. Chem. Phys. Discuss., 8, 5305-5358, 2008
www.atmos-chem-phys-discuss.net/8/5305/2008/
doi:10.5194/acpd-8-5305-2008
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Review Status
This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Simultaneous atmospheric measurements using two Fourier transform infrared spectrometers at the Polar Environment Atmospheric Research Laboratory during spring 2006, and comparisons with the Atmospheric Chemistry Experiment-Fourier Transform Spectrometer
D. Fu1, K. A. Walker1,2, R. L. Mittermeier3, K. Strong2, K. Sung2,*, H. Fast3, P. F. Bernath5,6, C. D. Boone1,4, W. H. Daffer1, P. Fogal2, F. Kolonjari2, P. Loewen3, G. L. Manney5,7, and O. Mikhailov2
1Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada
2Department of Physics, University of Toronto, Toronto, Ontario, Canada
3Environment Canada, Toronto, Ontario, Canada
4Department of Chemistry, University of York, Heslington, York, UK
5Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
6Columbus Technologies and Services Inc., Pasadena, California, USA
7also at: New Mexico Institute of Mining and Technology, Socorro, New Mexico, USA
*aow at: Jet Propulsion Lab., California Institute of Technology, Pasadena, California, USA

Abstract. The 2006 Canadian Arctic ACE (Atmospheric Chemistry Experiment) Validation Campaign collected measurements at the Polar Environment Atmospheric Research Laboratory (PEARL, 80.05° N, 86.42° W, 610 m above sea level) 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, HNO3, NO2, HCl, HF, NO, and ClONO2 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, the biases in retrieved columns from the two spectrometers represent the instrumental differences. These differences were consistent with those seen in previous FTS intercomparison studies. 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, HDO and N2O5 profiles and the differences found were consistent with the other validation comparison studies for the ACE-FTS version 2.2 data products. Column densities of O3, HCl, ClONO2, and HNO3 from the three FTSs were normalized with respect to HF and used to probe the time evolution of the chemical constituents in the atmosphere over Eureka during spring 2006.

Citation: Fu, D., Walker, K. A., Mittermeier, R. L., Strong, K., Sung, K., Fast, H., Bernath, P. F., Boone, C. D., Daffer, W. H., Fogal, P., Kolonjari, F., Loewen, P., Manney, G. L., and Mikhailov, O.: Simultaneous atmospheric measurements using two Fourier transform infrared spectrometers at the Polar Environment Atmospheric Research Laboratory during spring 2006, and comparisons with the Atmospheric Chemistry Experiment-Fourier Transform Spectrometer, Atmos. Chem. Phys. Discuss., 8, 5305-5358, doi:10.5194/acpd-8-5305-2008, 2008.
 
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