Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Atmos. Chem. Phys., 4, 2345-2352, 2004
© Author(s) 2004. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
30 Nov 2004
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. Grant4, C. F. Butler3, R. Bevilacqua5, J. Davies6, H. DeBacker7, S. B. Andersen7, E. Kyrö8, E. Kivi8, P. von der Gathen9, H. Claude10, A. Benesova11, P. Skrivankova11, V. Dorokhov12, I. Zaitcev12, G. Braathen13, M. Gil14, Z. Litynska15, D. Moore16, and M. Gerding17 1Science Systems and Applications, Inc., Lanham, Maryland, USA
2NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
3NASA Langley Research Center, Langley, Virginia, USA
4SUNARC, San Francisco, California, USA
5U. S. Naval Research Laboratory
6Meteorological Service of Canada, Ontario, Canada
7Danish Meteorological Institute, Copenhagen, Denmark
8Finnish Meteorological Institute, Sodankylä, Finland
9Alfred Wegener Institute, Potsdam, Germany
10Deutscher Wetterdienst Meteorologisches Observatorium, Hohenpeissenberg, Germany
11Czech Hydrometeorological Institute, Prague, Czech Republic
12Central Aerological Observatory, Dolgoprudny, Russia
13Norsk Institutt for Luftforskning, Kjeller, Norway
14Instituto Nacional de Técnica Aeroespacial, Madrid, Spain
15Institute of Meteorology and Water Management, Legionowo, Poland
16U. K. Meteorological Office, Wokingham, Berks, United Kingdom
17Leibniz-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, E., 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., 4, 2345-2352,, 2004.
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