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Infrared remote sensing of atmospheric aerosols; Apports du sondage infrarouge a l'etude des aerosols atmospheriques

Abstract

The 2001 report from the Intergovernmental Panel on Climate Change emphasized the very low level of understanding of atmospheric aerosol effects on climate. These particles originate either from natural sources (dust, volcanic aerosols...) or from anthropogenic sources (sulfates, soot...). They are one of the main sources of uncertainty on climate change, partly because they show a very high spatio-temporal variability. Observation from space, being global and quasi-continuous, is therefore a first importance tool for aerosol studies. Remote sensing in the visible domain has been widely used to obtain a better characterization of these particles and their effect on solar radiation. On the opposite, remote sensing of aerosols in the infrared domain still remains marginal. Yet, not only the knowledge of the effect of aerosols on terrestrial radiation is needed for the evaluation of their total radiative forcing, but also infrared remote sensing provides a way to retrieve other aerosol characteristics (observations are possible at night and day, over land and sea). In this PhD dissertation, we show that aerosol optical depth, altitude and size can be retrieved from infrared sounder observations. We first study the sensitivity of aerosol optical properties to their micro-physical properties, we then develop a radiative transfer  More>>
Authors:
Publication Date:
Sep 15, 2005
Product Type:
Thesis/Dissertation
Report Number:
FRNC-TH-6476
Reference Number:
RN06054029; TVI: 0605
Resource Relation:
Other Information: TH: These methodes physiques en teledetection
Subject:
54 ENVIRONMENTAL SCIENCES; 47 OTHER INSTRUMENTATION; AEROSOL MONITORING; DUSTS; REMOTE SENSING; INFRARED RADIATION; ENVIRONMENTAL EFFECTS; CLIMATIC CHANGE; OPTICAL PROPERTIES; PARTICLE SIZE; RADIANT HEAT TRANSFER; VOLCANISM; INTERFEROMETERS; RADIOMETERS; TEMPERATURE MONITORING
OSTI ID:
20723746
Research Organizations:
Paris-6 Univ. Pierre et Marie Curie, 75 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR0601395
Availability:
Commercial reproduction prohibited; OSTI as DE20723746
Submitting Site:
FR
Size:
282 pages
Announcement Date:
May 13, 2006

Citation Formats

Pierangelo, C. Infrared remote sensing of atmospheric aerosols; Apports du sondage infrarouge a l'etude des aerosols atmospheriques. France: N. p., 2005. Web.
Pierangelo, C. Infrared remote sensing of atmospheric aerosols; Apports du sondage infrarouge a l'etude des aerosols atmospheriques. France.
Pierangelo, C. 2005. "Infrared remote sensing of atmospheric aerosols; Apports du sondage infrarouge a l'etude des aerosols atmospheriques." France.
@misc{etde_20723746,
title = {Infrared remote sensing of atmospheric aerosols; Apports du sondage infrarouge a l'etude des aerosols atmospheriques}
author = {Pierangelo, C}
abstractNote = {The 2001 report from the Intergovernmental Panel on Climate Change emphasized the very low level of understanding of atmospheric aerosol effects on climate. These particles originate either from natural sources (dust, volcanic aerosols...) or from anthropogenic sources (sulfates, soot...). They are one of the main sources of uncertainty on climate change, partly because they show a very high spatio-temporal variability. Observation from space, being global and quasi-continuous, is therefore a first importance tool for aerosol studies. Remote sensing in the visible domain has been widely used to obtain a better characterization of these particles and their effect on solar radiation. On the opposite, remote sensing of aerosols in the infrared domain still remains marginal. Yet, not only the knowledge of the effect of aerosols on terrestrial radiation is needed for the evaluation of their total radiative forcing, but also infrared remote sensing provides a way to retrieve other aerosol characteristics (observations are possible at night and day, over land and sea). In this PhD dissertation, we show that aerosol optical depth, altitude and size can be retrieved from infrared sounder observations. We first study the sensitivity of aerosol optical properties to their micro-physical properties, we then develop a radiative transfer code for scattering medium adapted to the very high spectral resolution of the new generation sounder NASA-Aqua/AIRS, and we finally focus on the inverse problem. The applications shown here deal with Pinatubo stratospheric volcanic aerosol, observed with NOAA/HIRS, and with the building of an 8 year climatology of dust over sea and land from this sounder. Finally, from AIRS observations, we retrieve the optical depth at 10 {mu}m, the average altitude and the coarse mode effective radius of mineral dust over sea. (author)}
place = {France}
year = {2005}
month = {Sep}
}