EOS Validation Program

Institution: Laboratoire d'Optique Atmospherique (LOA)S
                  Universite des Sciences et Technologies de Lille
                  F-59655 Villeneuve d'Ascq cedex, FRANCE
E-mail: colette.brogniez@loa.univ-lille1.fr

J. B. Renard, Laboratoire de Physique et Chimie de l'Environnement (LPCE), FRANCE, jbrenard@cnrs-orleans.fr
J. Ovarlez, Laboratoire de Meteorologie Dynamique (LMD), FRANCE, ovarlez@lmdx04.polytechnique.fr
J. Pommereau, Service d'Aeronomie du CNRS (SA), FRANCE, goutail@aerov.jussieu.fr
S. Godin, Service d'Aeronomie du CNRS (SA), FRANCE, sophie.godin@aero.jussieu.fr
P. Keckhut, Service d'Aeronomie du CNRS (SA), FRANCE, keckhut@aerov.jussieu.fr
C. Camy-Pevret, Laboratoire de Physique Moleculaire et Applications (LPMA), FRANCE, camy@ccr.jussieu.fr
M. Van Roozendael, Institut d'Aeronomie Spatiale de Belgique (IASB), BELGIUM, michelv@oma.be
E. Kyro, Sodankyla Observatory of the Finnish Meteorological Institute (FMI), FINLAND, rigel.kivi@fmi.fi
K. Fricke, Physikalisches Institut der Universitat (PIBU), GERMANY, fricke@axpib.physik.uni-bonn.de
H. Jager, Fraunhofer Institut fur Atmospharische Umwelforschung (IFU), GERMANY, jaeger@ifu.fhg.de
G. P. Gobbi, Istituto di Fisica dell'Atmosfera (CFA), ITALY, gobbi@sunifa1.ifsi.fra.cnr.it
B. Arlander, Norwegian Institute for Air Research (NILU), NORWAY, bar@samson.nilu.no
G. Vaughan, Physics Department (PDUCW), UNITED KINGDOM, gxv@aber.ac.uk

Progress Report, June 1999

Validation of the measurements obtained by SAGE III is an important step that has to be achieved by independent means. Several European research groups intend to coordinate their efforts for such a validation. They propose to obtain data of aerosol and trace gas concentrations in the stratosphere by balloon-borne instruments and by ground-based instruments. Several of the teams that are taking part in this proposal have already been involved in the SAGE II European validation campaign or in other satellite validation campaigns UARS, POAM II, GOME, ILAS.

The balloons will be launched from various sites in good-coincidence in time and space with satellite overpasses; the balloon-borne instruments are : RADIBAL+BOCCAD (aerosol-refractive index, -size distribution, -extinction, O3), LOA, AMON+SALOMON (O3, NO2, NO3, OClO, aerosol extinction), LPCE, ELHYSA+particle counter (H2O, aerosol size distribution), LMD, SAOZ (O3, NO2, aerosol extinction), SA, LPMA (O3, NO2, H2O, NO3, other species), LPMA.

A balloon campaign is planned to be organized in late summer 1998 from Esrange (Sweden, 67.9N- 21.1E) for the joint validation of POAM III and SAGE III. Another balloon campaign will take place in January-March 1999, also from Esrange, in the frame of the THESEO (THird European Stratospheric Experiment on Ozone) campaign. Moreover several balloons will be launched in fall 1998 from Aire sur l'Adour (France, 43.7N, 0.3W). Balloon campaigns in the northern high latitudes can be used for sunset solar occultations, and the midlatitude balloon campaigns can help to validate lunar occultations.

The ground-based instruments involved are aerosol and ozone lidars, UV-visible spectrometers, Brewer spectrometers, FTIR, and microwave instruments. They are operated by : IASB Belgium, FMI Finland, PIBU and IFU Germany, CNR Italy, NILU Norway, BDUCW United Kingdom, SA France. Some of these instruments operate on a more or less regular basis at all latitudes considered.

In summary the instruments involved in the European validation are capable to measure altitude profiles and/or column amounts of aerosols (including PSCs), trace gas and also temperature for validating SAGE III solar occultations and/or lunar occultations measurements.