NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Aerosol Models for the CALIPSO Lidar Inversion AlgorithmsWe use measurements and models to develop aerosol models for use in the inversion algorithms for the Cloud Aerosol Lidar and Imager Pathfinder Spaceborne Observations (CALIPSO). Radiance measurements and inversions of the AErosol RObotic NETwork (AERONET1, 2) are used to group global atmospheric aerosols using optical and microphysical parameters. This study uses more than 105 records of radiance measurements, aerosol size distributions, and complex refractive indices to generate the optical properties of the aerosol at more 200 sites worldwide. These properties together with the radiance measurements are then classified using classical clustering methods to group the sites according to the type of aerosol with the greatest frequency of occurrence at each site. Six significant clusters are identified: desert dust, biomass burning, urban industrial pollution, rural background, marine, and dirty pollution. Three of these are used in the CALIPSO aerosol models to characterize desert dust, biomass burning, and polluted continental aerosols. The CALIPSO aerosol model also uses the coarse mode of desert dust and the fine mode of biomass burning to build a polluted dust model. For marine aerosol, the CALIPSO aerosol model uses measurements from the SEAS experiment 3. In addition to categorizing the aerosol types, the cluster analysis provides all the column optical and microphysical properties for each cluster.
Document ID
20040004300
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Omar, Ali H. (NASA Langley Research Center Hampton, VA, United States)
Winker, David M. (NASA Langley Research Center Hampton, VA, United States)
Won, Jae-Gwang (Seoul National Univ. Korea, Republic of)
Date Acquired
September 7, 2013
Publication Date
January 1, 2003
Subject Category
Geophysics
Meeting Information
Meeting: 2003 SPIE Remote Sensing of Clouds and the Atmosphere VIII
Location: Barcelona
Country: Spain
Start Date: September 8, 2003
End Date: September 12, 2003
Sponsors: International Society for Optical Engineering
Funding Number(s)
OTHER: 259-40-01-10
Distribution Limits
Public
Copyright
Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available