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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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doi:10.5194/amtd-2-343-2009
© Author(s) 2009. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
16 Feb 2009
Review status
This discussion paper has been under review for the journal Atmospheric Measurement Techniques (AMT). The revised manuscript was not accepted.
Springtime Arctic ground-based spectroscopy of O3 and related trace gases at Eureka, Canada – Part 1: Evaluation of the analysis method and comparison with infrared measurements
E. Farahani1,*, K. Strong1, R. L. Mittermeier2, H. Fast2, M. Van Roozendael3, and C. Fayt3 1Department of Physics, University of Toronto, Toronto, Ontario, Canada
2Environment Canada, Toronto, Ontario, Canada
3Belgian Institute for Space Aeronomy (IASB-BIRA), Belgium
*now at: SPARC International Project Office, University of Toronto, Toronto, Ontario, Canada
Abstract. For the first time in spring 1999 the ground-based UV-visible zenith-sky measurements of stratospheric gases were performed at Environment Canada's Arctic Stratospheric Ozone Observatory (ASTRO) located at Eureka, Nunavut, Canada (80.05° N, 86.42° W, 610 m a.s.l.). The University of Toronto UV-visible ground-based spectrometer (UT-GBS) has been deployed for nine years afterwards at Eureka to measure ozone and NO2 total columns by using sunlight scattered from the zenith sky during spring, when the conditions leading to polar ozone depletion develop. During spring 2000, elevated OClO slant column densities were also measured for the first time. First dedicated analysis of UT-GBS measurements applying two independent differential optical absorption spectroscopy algorithms was performed on spectra recorded during spring 2000. The resulting ozone and NO2 total columns agreed to 4% and 5% or better, respectively. Also, first four years of UT-GBS results (1999–2003) were compared with those made by ozonesondes and by the Meteorogical Service of Canada Fourier transform infrared spectrometer (MSC FTS) at ASTRO, which has been operated by Canada's Department of Environment for measuring the total columns of several stratospheric gases. The comparison of UT-GBS and MSC FTS ozone total columns proved to be better than 5% for the periods when both instruments were viewing similar air masses.

Citation: Farahani, E., Strong, K., Mittermeier, R. L., Fast, H., Van Roozendael, M., and Fayt, C.: Springtime Arctic ground-based spectroscopy of O3 and related trace gases at Eureka, Canada – Part 1: Evaluation of the analysis method and comparison with infrared measurements, Atmos. Meas. Tech. Discuss., 2, 343-377, doi:10.5194/amtd-2-343-2009, 2009.
E. Farahani et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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RC S70: 'review of paper', Anonymous Referee #3, 01 Apr 2009 Printer-friendly Version 
 
RC S73: 'Referee Comment', Anonymous Referee #1, 06 Apr 2009 Printer-friendly Version 
 
RC S101: 'Referee Comment', Anonymous Referee #2, 08 Apr 2009 Printer-friendly Version 
E. Farahani et al.
E. Farahani et al.

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