Boundary layer aerosol composition over Sierra Nevada Mountains using 9.11- and 10.59-μm continuous wave lidars and modeled backscatter from size distribution data
| Autor: | Eugene W. McCaul, Vandana Srivastava, S. D. Howard, Rudolf F. Pueschel, Maurice A. Jarzembski, Dean R. Cutten |
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| Rok vydání: | 2003 |
| Předmět: |
Atmospheric Science
Ecology Backscatter Atmospheric models Planetary boundary layer Paleontology Soil Science Mineralogy Forestry Aquatic Science Oceanography Aerosol Wavelength Geophysics Lidar Space and Planetary Science Geochemistry and Petrology Volume fraction Particle-size distribution Earth and Planetary Sciences (miscellaneous) Environmental science Physics::Atmospheric and Oceanic Physics Earth-Surface Processes Water Science and Technology Remote sensing |
| Zdroj: | Journal of Geophysical Research: Atmospheres. 108 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/2002jd002252 |
| Popis: | An inversion technique has been developed to determine volume fractions of an atmospheric aerosol composed primarily of ammonium sulfate and ammonium nitrate and water combined with fixed concentration of elemental and organic carbon. It is based on measured aerosol backscatter obtained with 9.11 - and 10.59-micron wavelength continuous wave CO2 lidars and modeled backscatter from aerosol size distribution data. The technique is demonstrated during a flight of the NASA DC-8 aircraft over the Sierra Nevada Mountain Range, California on 19 September, 1995. Volume fraction of each component and effective complex refractive index of the composite particle were determined assuming an internally mixed composite aerosol model. The volume fractions were also used to re-compute aerosol backscatter, providing good agreement with the lidar-measured data. The robustness of the technique for determining volume fractions was extended with a comparison of calculated 2.1,-micron backscatter from size distribution data with the measured lidar data converted to 2.1,-micron backscatter using an earlier derived algorithm, verifying the algorithm as well as the backscatter calculations. |
| Databáze: | OpenAIRE |
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