Articles | Volume 4, issue 9/10
Atmos. Chem. Phys., 4, 2345–2352, 2004

Special issue: SAGE III Ozone loss and validation experiment II and the validation...

Atmos. Chem. Phys., 4, 2345–2352, 2004

  30 Nov 2004

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 L. R. Lait et al.
  • 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.

Final-revised paper