HR: 1340h
AN: A33A-0857 [Abstracts]
TI: Aerosol Characterization using 7-wavelength transmission measurements during the 2004 United Arabic
Emirates - Unified Aerosol Experiment (UAE2)
AU: * de Leeuw, G
EM: deleeuw@fel.tno.nl
AF: TNO, POB 96864, The Hague, 2509 JG
Netherlands
AU: Kusmierczyk-Michulec, J
EM: michulec@fel.tno.nl
AF: TNO, POB 96864, The Hague, 2509 JG
Netherlands
AU: de Jong, A
EM: dejong@fel.tno.nl
AF: TNO, POB 96864, The Hague, 2509 JG
Netherlands
AU: Fritz, P
EM: fritz@fel.tno.nl
AF: TNO, POB 96864, The Hague, 2509 JG
Netherlands
AU: Moerman, M
EM: moerman@fel.tno.nl
AF: TNO, POB 96864, The Hague, 2509 JG
Netherlands
AB:
TNO participated to the UAE2 campaign with the retrieval of aerosol properties using AATSR, and its multi-band optical/IR
transmissometer which provided horizontal, path-integrated transmission data. The transmissometer emitter and receiver were
both installed at a coastal site, with a retro-reflector at a distance of 890 m across the harbor that provided a total
transmission path of 1780 m. The wave bands were roughly centered at 0.45. 0.6, 0.9, 1.5, 2.3, 4 and 10 micrometers. The
molecular contribution at each wavelength was calculated using MODTRAN using measured meteorological parameters such as
relative humidity, air temperature and atmospheric pressure. The results were used to correct the measured transmission to
retain the aerosol contribution. The aerosol extinction and its wavelengths dependence were subsequently analyzed to
determine the aerosol information content in the transmission data, in particular the added value of the infra-red bands was
investigated. Preliminary results indicate the necessity to use a three mode aerosol model is proposed for the retrieval of
aerosol information from the transmissometer data over the whole spectral range. Comparisons with sun photometer data
indicate the differences between horizontal transmission and the vertical column.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0360 Radiation: transmission and scattering
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005