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Results from the Canadian Arctic Validation of ACE Campaigns from 2004 to 2006

Tobias Kerzenmacher(1), Kaley Walker(2), Kimberly Strong(1), Richard Berman(3), Peter F. Bernath(2), Chris Boone(2), James R Drummond(1), Hans Fast(4), Annemarie Fraser(1), Dejian Fu(2), Florence Goutail(5), Michael Harwood(6), Paul Loewen(1), Keith MacQuarrie(1), Thomas McElroy(4), Clive Midwinter(1), Richard Mittermeier(4), Randall Skelton(2), Kevin Strawbridge(6), Keeyoon Sung(2), Jennifer Walker(1) and Hongjiang Wu(1)

(1) University of Toronto, 60 St George Street, Toronto M5S 1A7, Canada
(2) University of Waterloo, 200 University Avenue West, Waterloo N2L 3G1, Canada
(3) Spectral Applied Research, 10 North Rivermede Road, Concord L4K 2H2, Canada
(4) Meteorological Service of Canada, 4905 Dufferin Street, Toronto M3H 5T4, Canada
(5) CNRS, BP 3 - Route des Gatines, 91370 Verrières le Buisson, France
(6) Environment Canada, RR#1, 6248 Eighth Line, Egbert L0L 1N0, Canada


Three Arctic measurement campaigns have been conducted in Eureka (Canada) in spring 2004, 2005 and 2006 to validate measurements from the Atmospheric Chemistry Experiment (ACE) satellite mission. Launched on 12 August 2003, the ACE satellite (SCISAT-1) is in an 74° orbit at 650 km altitude. ACE science operation began in February 2004. Two instruments on board the satellite provide measurements of chemical species: a high-resolution infrared Fourier Transform Spectrometer (ACE-FTS) and a dual UV-visible-NIR spectrophotometer called ACE-MAESTRO (Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation). The main goal of the ACE mission is to provide measurements to increase our understanding of the ozone distribution in the upper troposphere and stratosphere, especially over the Arctic.

The validation campaigns were conducted at Environment Canada's Arctic Stratospheric Ozone (AStrO) Observatory (now PEARL - the Polar Environment Atmospheric Research Laboratory) in Eureka, Nunavut (80°N, 86°W) between February and April in 2004 to 2006. This period coincides with the most chemically active time of year in the Arctic and with a significant number of satellite overpasses. Seven ground-based instruments were operated during the 2004 campaign: a ground-based version of the ACE-FTS (PARIS-IR - Portable Atmospheric Research Interferometric Spectrometer for the Infrared), a clone of the ACE-MAESTRO, a SunPhotoSpectrometer (SPS), a zenith-viewing UV-visible grating spectrometer, a Bomem DA8 Fourier transform spectrometer, a Differential Absorption Lidar (DIAL) and a Brewer spectrophotometer. For the 2005 and 2006 campaigns, a Système d'Analyse par Observation Zénithale (SAOZ) instrument and a second Brewer spectrophotometer were added to the instrument complement. In addition to the ground-based instruments, balloon-borne ozonesonde and radiosonde sensors were flown frequently during both campaigns.

We focus here on comparisons of ozone, nitrogen dioxide and temperature measurements made by the ground-based, balloon-borne and satellite-borne instruments during the three ACE Arctic Validation campaigns. Comparisons of both retrieved columns and profiles will be presented. Also, the results from the three campaigns will be compared to highlight the differences between the years.


Full paper

Workshop poster

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry