HR: 1340h
AN: A33A-0833    [Abstracts]
TI: Ground-based Measurement Of Saharan Dust In Marine Environment
AU: * Jeong, M J
EM: mjeong@climate.gsfc.nasa.gov
AF: Earth System Science Interdisciplinary Center, 2207 Computer and Space Science Bldg., University of Maryland, College Park, MD 20742, United States
AU: * Jeong, M J
EM: mjeong@climate.gsfc.nasa.gov
AF: Earth Sciences Division, NASA Goddard Space Flight Center, Mail Code 613.2, Greenbelt, MD 20771, United States
AU: Ji, Q
EM: ji@climate.gsfc.nasa.gov
AF: Earth System Science Interdisciplinary Center, 2207 Computer and Space Science Bldg., University of Maryland, College Park, MD 20742, United States
AU: Ji, Q
EM: ji@climate.gsfc.nasa.gov
AF: Earth Sciences Division, NASA Goddard Space Flight Center, Mail Code 613.2, Greenbelt, MD 20771, United States
AU: Tsay, S
EM: tsay@climate.gsfc.nasa.gov
AF: Earth Sciences Division, NASA Goddard Space Flight Center, Mail Code 613.2, Greenbelt, MD 20771, United States
AU: Hsu, C
EM: hsu@climate.gsfc.nasa.gov
AF: Earth Sciences Division, NASA Goddard Space Flight Center, Mail Code 613.2, Greenbelt, MD 20771, United States
AU: Hansell, R A
EM: rhansell@atmos.ucla.edu
AF: Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA 90095, United States
AU: Augustine, D
EM: augie@radar.gsfc.nasa.gov
AF: George Mason University, George Mason University, Fairfax, VA 22030, United States
AB: An extensive field experiment, named NASA African Monsoon Multidisciplinary Analyses (NAMMA) was conducted during August-September of 2006 to investigate the genesis and development of hurricanes. Two ground-based mobile laboratories, Surface-sensing Measurements for Atmospheric Radiative Transfer (SMART) and Chemical, Optical, Microphysical Measurements of In-situ Troposphere (COMMIT), were deployed at Sal Island, Cape Verde to continuously monitor the structure and composition of the atmosphere in the major path of the Saharan Air Layer and the African Easterly Waves. A Micro-Pulse Lidar in SMART, which measures the vertical profiles of backscatter from the atmospheric particulates continuously, caught several episodes of Saharan dust layers reached the surface site. Simultaneously, physical and optical properties of aerosols (e.g., mixture of the Saharan dust and maritime aerosols) were captured by several instruments in COMMIT. In this study, we propose a novel method to separate dust properties from those of marine background aerosols by utilizing the synergy of a suite of in-situ measurements. Derived parameters are mass scattering coefficients and single scattering albedo (SSA) for dust near the surface (~10m). As a crosscheck, the SSA based on the surface measurements is compared with the result of Deep Blue satellite-based aerosol retrievals, which is now incorporated in the operational MODIS aerosol product. The presented preliminary results will be useful in studying the properties of Saharan dust originated from various source regions, which, in turns, can be used as inputs to aerosol transport models to help better understand the interactions between aerosol and cloud water cycle.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0478 Pollution: urban, regional and global (0345, 4251)
DE: 3360 Remote sensing
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting