Atmos. Chem. Phys. Discuss., 4, 4383-4406, 2004
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Non-coincident inter-instrument comparisons of ozone measurements using quasi-conservative coordinates
L. R. Lait1, P. A. Newman2, M. R. Schoeberl2, T. McGee2, L. Twigg1, E. V. Browell3, M. A. Fenn3, W. B. Grant3, C. F. Butler3, R. Bevilacqua4, J. Davies5, H. DeBacker6, S. B. Andersen6, E. Kyrö7, R. Kivi7, P. von der Gathen8, H. Claude9, A. Benesova10, P. Skrivankova10, V. Dorokhov11, I. Zaitcev11, G. Braathen12, M. Gil13, Z. Litynska14, D. Moore15, and M. Gerding16
1Science Systems and Applications, Inc., Lanham, Maryland, USA
2NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
3NASA Langley Research Center, Langley, Virginia, USA
4U. S. Naval Research Laboratory
5Meteorological Service of Canada, Ontario, Canada
6Danish Meteorological Institute, Copenhagen, Denmark
7Finnish Meteorological Institute, Sodankylä, Finland
8Alfred Wegener Institute, Potsdam, Germany
9Deutscher Wetterdienst Meteorologisches Observatorium, Hohenpeissenberg, Germany
10Czech Hydrometeorological Institute, Prague, Czech Republic
11Central Aerological Observatory, Dolgoprudny, Russia
12Norsk Institutt for Luftforskning, Kjeller, Norway
13Instituto Nacional de T´ecnica Aeroespacial, Madrid, Spain
14Institute of Meteorology and Water Management, Legionowo, Poland
15U. K. Meteorological Office, Wokingham, Berks, United Kingdom
16Leibniz-Institute of Atmospheric Physics, Kühlungsborn, Germany

Abstract. Ozone measurements from ozonesondes, AROTAL, DIAL, and POAM III instruments during the SOLVE-2/VINTERSOL period are composited in a time-varying, flow-following quasi-conservative (PV-θ) coordinate space; the resulting composites from each instrument are mapped onto the other instruments' locations and times. The mapped data are then used to intercompare data from the different instruments. Overall, the four ozone data sets are found to be in good agreement. AROTAL shows somewhat lower values below 16 km, and DIAL has a positive bias at the upper limits of its altitude range. These intercomparisons are consistent with those obtained from more conventional near-coincident profiles, where available. Although the PV-θ mapping technique entails larger uncertainties of individual profile differences compared to direct near-coincident comparisons, the ability to include much larger numbers of comparisons can make this technique advantageous.

Citation: Lait, L. R., Newman, P. A., Schoeberl, M. R., McGee, T., Twigg, L., Browell, E. V., Fenn, M. A., Grant, W. B., Butler, C. F., Bevilacqua, R., Davies, J., DeBacker, H., Andersen, S. B., Kyrö, E., Kivi, R., von der Gathen, P., Claude, H., Benesova, A., Skrivankova, P., Dorokhov, V., Zaitcev, I., Braathen, G., Gil, M., Litynska, Z., Moore, D., and Gerding, M.: Non-coincident inter-instrument comparisons of ozone measurements using quasi-conservative coordinates, Atmos. Chem. Phys. Discuss., 4, 4383-4406, doi:10.5194/acpd-4-4383-2004, 2004.
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