Brent Holben, 1 Tom Eck,1,2 Alexander Smirnov2, Oleg Dubovik2

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AERONET-Proposed ground-based RS Aerosol
Measurements for UAE

• Brent Holben, 1 Tom Eck,1,2 Alexander Smirnov2,
  Oleg Dubovik2
• 1NASA Goddard Space Flight Center, Directorate of
  Earth Sciences
• 2Goddard Earth Sciences and Technological Center
  (GESTC)University of Maryland Baltimore County
  (UMBC)
• Outline
• Overview of the AERONET program
• AERONET Products and analysis
• Proposed AERONET sites
• Requested In-country support
• Summary of Proposed AERONET Measurements for UAE

http//aeronet.gsfc.nasa.gov
More information gt
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AERONET A Federation of International
Collaborators

• Research Operations
• Program of long term measurements for aerosol
  research and environmental assessment
• Homepage access http//aeronet.gsfc.nasa.gov/
• Project Objectives
• Validation of Satellite Aerosol Retrievals
• Characterization of aerosol optical properties
• Synergism with Satellite obs., Climate Models
• Provide mesoscale observations during regional
  field campaigns

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Characteristics of AERONET sun and sky scanning
Radiometer
Flux measurements Direct - l340, 380, 440, 500,
670, 870, 940, 1020 nm Diffuse - l440, 670, 870,
1020 nm (alm, pp, pol)

• Holben et al. RSE, 1998
• Holben et al. JGR, 2001
• Eck et al. JGR, 1999
• Smirnov et al. JGR, 2000
• Dubovik King JGR, 2000
• Dubovik et al. JGR 2000

Calibration and processing information
Aerosol optical depth and precipitable water
computations
Cloud screening and quality control
Inversion products
Volume size distribution (0.05ltRlt15
mm), refractive index, single scattering
albedo (l440, 670, 870, 1020 nm)
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AERONET Products
Precipitable Water (15 min)
Aerosol Optical Depth (15 min)
AOD Climatology
Size Distributions
Single Scattering Albedo
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AERONET global comparison Properties from four
Generic types
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Proposed AERONET Distribution
Current Sites Proposed sites MAARCO site
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AERONET requested Support

• Authorization for new sites
• Logistical support to establish sites
• Technical and logistical assistance to maintain
  sites
• All AERONET data and products will be available
  in near real-time through the internet
• http//aeronet.gsfc.nasa.gov

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AERONET Measurement Objectives for UAE

• Measure accurately and continuously the column
  integrated mesoscale aerosol optical properties
• Measure, for the first time, UV through Infrared
  sky radiance for retrievals of particle size
  distribution, single scattering albedo and
  complex index of refraction
• Measure for the first time ocean leaving radiance
  for dust aerosol with the SeaPRISM.
• Intercompare CAR/AERONET/AATS retrievals of
  aerosol properties to simultaneous retrievals of
  in situ microphysics measurements from MAARCO and
  Aerocommander platforms
• Validation and comparison
• MPL (vertical distribution of aerosol)
• SeaPRISM (water leaving radiance)
• MODIS/TOMS/SeaWiFS