HR: 1340h
AN: A33C-0922 [Abstracts]
TI: Comparison of POLDER Derived Aerosol Optical Thickness to Surface Monitor Fine Particle
Concentration
AU: * Leon, J
EM: leon@loa.univ-lille1.fr
AF: Laboratoire d'Optique Atmospherique, CNRS-Universite Lille 1, Cite scientifique, Villeneuve d'Ascq,
59655
France
AU: Kacenelenbogen, M
EM: meloe@loa.univ-lille1.fr
AF: Laboratoire d'Optique Atmospherique, CNRS-Universite Lille 1, Cite scientifique, Villeneuve d'Ascq,
59655
France
AU: Chiapello, I
EM: chiap@loa.univ-lille1.fr
AF: Laboratoire d'Optique Atmospherique, CNRS-Universite Lille 1, Cite scientifique, Villeneuve d'Ascq,
59655
France
AB:
The Particulate Matter (PM) mass measured at the ground level is a common way to quantify the amount of aerosol particles in
the atmosphere and is used as a standard to evaluate air quality. Satellite remote sensing is well suited for a daily
monitoring of the aerosol load.
However, there are no straightforward relationship between aerosol optical properties derived from the satellite sensor and
the PM mass at the ground. This paper is focused on the use of Polarization and Directionality of Earth's Reflectance
(POLDER-2) derived aerosol optical thickness (AOT) for the monitoring of PM2.5. We present a correlation study between PM2.5
data collected in the frame of the French Environmental protection agency, aerosol optical properties derived from Sun
photometer measurements, and POLDER derived-AOT over the land. POLDER AOT retrieval algorithm over the land is based on the
use of the measurement of the linear polarized light in the 670 nm and 865 nm channels. We show that only the fine fraction
(below 0.3 æm) of the aerosol size distribution contributes to the signal in polarization and then to the POLDER derived-AOT
and then is well suited for monitoring of fine particle. The correlation between POLDER AOT and PM2.5 is significant (R
between 0.6 and 0.7) over several sites. We present a tentative evaluation of Air Quality Categories from satellite data.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 3360 Remote sensing
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005