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SAUNA - Sodankylä Total Ozone Intercomparison and Validation Campaign

B.R. Bojkov(1), R.D. McPeters(2), P.K. Bhartia(1), E. Kyrö(3), C. Zehner(4), E. Brinksma(5), E. Cuevas(6), R.D. Evans(7), F. Goutail(8), D.V. Ionov(8), R. Kivi(9), U. Koehler(10), C.T. McElroy(11), T.J. McGee(1), A. Redondas(6), M. Van Roozendael(12) and B. Walsh(7)

(1) NASA Goddard Space Flight Center, Code 613.3, Greenbelt, MD 20771, United States
(2) NASA Goddard Space Flight Center, , Greenbelt, MD 20771, United States
(3) FMI Arctic Research Center, Tähteläntie 62, FIN-99600 Sodankylä, Finland
(4) ESA ESRIN, Via Galileo Galilei, I-00044 Frascati, Italy
(5) KNMI, PO Box 201 , NL-3730 AE De Bilt, Netherlands
(6) INM, Observatorio Atmosférico de Izana, Santa Cruz de Tenerife E-38071, Spain
(7) NOAA ESRL Global Monitoring Division, 325 Broadway R/GMD1, Boulder, CO 80305-3328, United States
(8) CNRS Service d'Aeronomie, Route des Gatines, Verriere le Buisson F-91371, France
(9) FMI Arctic Research Center, Tähteläntie 62, Sodankylä FIN-99600, Finland
(10) DWD Meteorological Observatory Hohenpeissenberg, Albin-Schweiger-Weg 10, Hohenpeissenberg D-82383, Germany
(11) Meteorological Service of Canada, 4905 Dufferin Street, M3H 5T4 Downsview, Ontario, Canada
(12) IASB, Avenue Circulaire 3, B-1180 Brussels, Belgium


After nearly thirty years of experience in comparing space-borne total ozone column measurements with ground based measurements, large differences remain at high-latitudes under conditions of low sun. These persistent ozone column differences are likely due in part to the problems with the absolute accuracy of the groundbased measurements, in part to observational differences between satellite and groundbased techniques, and in part to problems with the accuracy of the various satellite algorithms. Improved accuracy in the groundbased high-latitude/high solar zenith angle measurements of ozone, which is the goal of the SAUNA campaign. Will lead to improved satellite ozone measurements, and also to better understanding of the processes that contribute to the eventual recovery of the ozone layer.

The primary objective off the Sodankylä total ozone intercomparison and validation campaign (SAUNA) is to establish a groundbased instrument and algorithm baseline using standard network instrumentation to retrieve the total column ozone to within one percent under these difficult measurement conditions. The other objective of SAUNA is to support the ongoing validation of the EOS-Aura OMI, the ERS-GOME, the Envisat-Sciamachy and SCISAT MAESTRO and FTS instruments, by performing satellite coincident measurements.

SAUNA will take place at Sodankylä, Finland (67.4° N, 26.6° E) from March 20 through April 13, 2006. A wide variety of groundbased instruments from nine institutes in eight countries will participate. Instruments will include three Brewer spectrophotometers, two Dobson instruments, two DOAS, a SAOZ, and the NDSC traveling standard stratospheric ozone LIDAR. There will also be daily ozonesonde launches. An overview of the campaign and preliminary results will be presented.


Workshop presentation

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