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Global Modeling of Mineral Dust and its Optical ThicknessGlobal distribution of dust in the atmosphere has been simulated using the NASA Goddard chemical transport model (GEOS-CTM) to help retrieve the aerosol optical thickness from TOMS absorbing aerosol index. The model contains a dust module which accounts for sources and removal processes. The transport is driven by the assimilated meteorological fields generated by the NASA Goddard Earth Observing System Data Assimilation System (GEOS DAS). One of the key parameters, in the retrieval algorithm of optical thickness from Total Ozone Mapping Spectrometer (TOMS) data, is the vertical profile of aerosols. During the period 10- 19 September 1994, Lidar on-space Technology Experiment (LITE) was flown on space shuttle Discovery. The 53 hours of data collected cover the lower atmosphere from the earth surface to 20 kilometers altitude and from 57 N to 57 S with a high resolution of about 15 meters. The model results are compared with LITE data over the source regions of dust (Africa, Middle East, Asia, Australia) and in the remote troposphere (Atlantic and Pacific). The simulated horizontal distribution is compared with TOMS absorbing aerosol index. Finally the calculated optical thickness will be assessed with ground based sun-photometers (AERONET).
Document ID
19990088790
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Ginoux, Paul A.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Chin, Mian
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Tegen, Ina
(NASA Goddard Inst. for Space Studies New York, NY United States)
Herman, Jay R.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Torres, Omar
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Winker, David
(NASA Langley Research Center Hampton, VA United States)
Holben, Brent
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Lin, S.-J.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Subject Category
Environment Pollution
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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