NOAA/NESDIS Cooperative Research Program Second Annual Science Symposium SATELLITE CALIBRATION & VALIDATION July 13-14 2004 Barry Gross (CCNY) Brian Cairns (NASA-GISS) Bill Lawrence (Bowie State) Michael Hagigeorgiou (Ugrad CCNY) Min Min Oo (Grad CCNY) Istvan Laszlo (NOAA-NESDIS) Stephan Ungar (NASA-GSFC) Thomas Brakke (NASA-GSFC) Validation and Refinement of Modis Aerosol Optical Depth Product over Coastal Urban Areas
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Validation and Refinement of Modis Aerosol Optical Depth Product over Coastal Urban Areas
Barry Gross (CCNY) Brian Cairns (NASA-GISS) Bill Lawrence (Bowie State) Michael Hagigeorgiou (Ugrad CCNY) Min Min Oo (Grad CCNY) Istvan Laszlo (NOAA-NESDIS) Stephan Ungar (NASA-GSFC) Thomas Brakke (NASA-GSFC). - PowerPoint PPT Presentation
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NOAA/NESDIS Cooperative Research Program Second Annual Science Symposium
SATELLITE CALIBRATION & VALIDATION July 13-14 2004
Barry Gross (CCNY)Brian Cairns (NASA-GISS)Bill Lawrence (Bowie State)
Michael Hagigeorgiou (Ugrad CCNY)Min Min Oo (Grad CCNY)
Validation and Refinement of Modis Aerosol Optical Depth
Product over Coastal Urban Areas
NOAA/NESDIS Cooperative Research Program Second Annual Science Symposium
SATELLITE CALIBRATION & VALIDATION July 13-14 2004
Motivation
• Air Pollution forcasting (Ozone, Aerosols, etc) has become a major NOAA responsibility in support of EPA
• MODIS AOT algorithms are global in nature.• Application to regional areas may be difficult due to local
ground albedo anomolies.• Colocated matchups show that MODIS optical depth
retrievals often overestimate optical depth measurements on the North East coast in urban areas
• Separate aerosol and land contributions using high spatial resolution data to help– Examine urban ground reflectance to tune MODIS – Retrieve aerosols in urban areas
NOAA/NESDIS Cooperative Research Program Second Annual Science Symposium
SATELLITE CALIBRATION & VALIDATION July 13-14 2004
Colocated matchup procedure
• Intercompare MODIS Optical Depth with CIMEL optical depth. (Need to use only spatially homogeneous datasets)
• CIMEL Optical Depth taken between NYC and Brookhaven (5 hour mean to agree within 10%)
• MODIS 10km products. 3 x 3 cells to have std < 20% mean
• Few Points satisfy these conditions
brookhaven
CCNY
NOAA/NESDIS Cooperative Research Program Second Annual Science Symposium
SATELLITE CALIBRATION & VALIDATION July 13-14 2004
Intercomparision betweenCIMEL Sky radiometer and Satellite
CART Site CCNY Site
CIMEL
MODIS
CIMEL
MODIS
NOAA/NESDIS Cooperative Research Program Second Annual Science Symposium
SATELLITE CALIBRATION & VALIDATION July 13-14 2004
MODIS Aerosol algorithms over land
25.660
25.470
2160,
660,
2160,
470,
c
c
g
g
g
g
Surface correlations
NOAA/NESDIS Cooperative Research Program Second Annual Science Symposium
SATELLITE CALIBRATION & VALIDATION July 13-14 2004