HR: 1340h
AN: A33D-0087    [Abstracts]
TI: Determination of macrophysics and microphysics cloud parameters from combination of passive and active radiation measurements during the airborne FRENCH campaign
AU: * Ovigneur, B
EM: bertrand.ovigneur@loa.univ-lille1.fr
AF: Laboratoire d'Optique Atmosph\'{e}rique, Universit\'{e} de Sciences et Technologie de Lille, Villeneuve d'Ascq, 59655 France
AU: Parol, F
AF: Laboratoire d'Optique Atmosph\'{e}rique, Universit\'{e} de Sciences et Technologie de Lille, Villeneuve d'Ascq, 59655 France
AU: Pelon, J
AF: Service d'A\'{e}ronomie, Universit\'{e} Pierre et Marie Curie, Paris, 75252 France
AU: Labonnote, L C
AF: Laboratoire d'Optique Atmosph\'{e}rique, Universit\'{e} de Sciences et Technologie de Lille, Villeneuve d'Ascq, 59655 France
AB: The airborne FRENCH (Field Radiation Experiment on Natural Cirrus and High-level clouds) campaign has taken place over the Atlantic Ocean and the Mediterranean Sea off the coasts of southern France from the end of September to mid-October in 2001. The flights plans were high enough to acquire measurements above high-level clouds such as cirrus. The aim of this experiment was to acquire simultaneously measurements of various remote sensing instruments (passive and active) in order to describe optical and radiative cloud properties and their link with microphysical properties. This campaign was also an opportunity to analyze combination of radiation instruments before it is exploited in the frame of future space missions such as the Aqua-Train. Some of the instruments on board the aircraft had characteristics similar to those of spaceborne instruments of the Train. The airPOLDER (POLarization and Directionality of the Earth's Reflectances) is similar to PARASOL and measures multidirectional and polarized reflected light in the visible and the near-infrared. The MiniMIR (Middle InfraRed) instrument has spectral channels similar to some of MODIS. Leandre (lidar with polarization capabilities) is very similar to the CALIOP lidar on board the CALIPSO platform and finally, the multichannel thermal infrared radiometer CLIMAT has spectral channels close to those of the IIR radiometer on board CALIPSO. Moreover, we lead our study as part of a new instrumental project of the laboratory, which should be a multidirectional and polarized radiometer with capability of spectral measurements extended up to 2.5 æm. Thanks to the diversity of the instruments available during the FRENCH campaign, we compare and combine the different measurements using various methods. As a first step of our analysis, cloud altitude is derived from different techniques. Then we investigate a methodology based on the capability of each instrument, in order to determine the cloud optical thickness as well as to describe the cloud microphysics.
DE: 3337 Numerical modeling and data assimilation
DE: 3359 Radiative processes
DE: 3360 Remote sensing
DE: 0320 Cloud physics and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting