Non-coincident inter-instrument comparisons of ozone measurements using quasi-conservative coordinates

L. R. Lait (1) , P. A. Newman (2) , M. R. Schoeberl (2) , T. Mcgee (2) , L. Twigg (1) , E. V. Browell (3) , M. A. Fenn (3) , W. B. Grant (4) , C. F. Butler (3) , R. Bevilacqua (5) , J. Davies (6) , H. Debacker (7) , S. B. Andersen (7) , E. Kyrö (8) , E. Kivi (8) , P. von Der Gathen (9) , H. Claude (10) , A. Benesova (11) , P. Skrivankova (11) , V. Dorokhov (12) , I. Zaitcev (12) , G. Braathen (13) , M. Gil (14) , Z. Litynska (15) , D. Moore (16) , M. Gerding (17)

1 SSAI - Science Systems and Applications, Inc. [Lanham]
2 GSFC - NASA Goddard Space Flight Center
3 NASA Headquarters
4 SUNARC
5 NRL - Naval Research Laboratory
6 Meteorological Service of Canada
7 DMI - Danish Meteorological Institute
8 FMI - Finnish Meteorological Institute
9 AWI - Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine
10 MOHp - Meteorologisches Observatorium Hohenpeißenberg
11 CHMI - Czech Hydrometeorological Institute
12 CAO - Central Aerological Observatory
13 NILU - Norsk Institutt for Luftforskning
14 INTA - Instituto Nacional de Técnica Aeroespacial
15 IMGW - PIB - Institute of Meteorology and Water Management - National Research Institute
16 U. K. Meteorological Office
17 AIP - Leibniz-Institute of Atmospheric Physics

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-?) 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-? 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.

Domaines: Océan, Atmosphère

L. R. Lait, P. A. Newman, M. R. Schoeberl, T. Mcgee, L. Twigg, et al.. Non-coincident inter-instrument comparisons of ozone measurements using quasi-conservative coordinates. Atmospheric Chemistry and Physics, 2004, 4 (9/10), pp.2345-2352. ⟨hal-00295556⟩