Validating MODIS Above-Cloud Aerosol Optical Depth Retrieved from Color Ratio Algorithm Using Direct Measurements Made by NASA's Airborne AATS and 4STAR Sensors

We present the validation analysis of above-cloud aerosol optical depth (ACAOD) retrieved from the color ratio method applied to MODIS cloudy-sky reflectance measurements using the limited direct measurements made by NASAs airborne Ames Airborne Tracking Sunphotometer (AATS) and Spectrometer for Sky...

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Vydané v:Atmospheric measurement techniques Ročník 9; číslo 10; s. 5053 - 5062
Hlavní autori: Jethva, Hiren, Torres, Omar, Remer, Lorraine, Redemann, Jens, Livingston, John, Dunagan, Stephen, Shinozuka, Yohei, Kacenelenbogen, Meloe, Segal Rozenhaimer, Michal, Spurr, Rob
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Goddard Space Flight Center EGU 14.10.2016
Copernicus GmbH
Copernicus Publications
Predmet:
Aerosol optical depth
Aerosol optical properties
Aerosols
Airborne remote sensing
Airborne sensing
Aircraft
Algorithms
Atmospheric particulates
Atmospheric research
Biomass burning
Burning
Cloud optical depth
Clouds
Color
Colour
Datasets
Decks
Depth
Dust storms
Earth Resources And Remote Sensing
Experiments
Field tests
Geophysics
MODIS
Optical analysis
Optical properties
Optical thickness
Photometers
Reflectance
Satellites
Sensors
Sky
Tracking
Uncertainty
Wildfires
Wildlife tourism
United States > US
Atlantic Ocean
Pacific Ocean
Airborne Sun Photometer
ISSN:1867-1381, 1867-8548, 1867-8548
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Shrnutí:We present the validation analysis of above-cloud aerosol optical depth (ACAOD) retrieved from the color ratio method applied to MODIS cloudy-sky reflectance measurements using the limited direct measurements made by NASAs airborne Ames Airborne Tracking Sunphotometer (AATS) and Spectrometer for Sky-Scanning, Sun-Tracking Atmospheric Research (4STAR) sensors. A thorough search of the airborne database collection revealed a total of five significant events in which an airborne sun photometer, coincident with the MODIS overpass, observed partially absorbing aerosols emitted from agricultural biomass burning, dust, and wildfires over a low-level cloud deck during SAFARI-2000, ACE-ASIA 2001, and SEAC4RS 2013 campaigns, respectively. The co-located satellite-airborne match ups revealed a good agreement (root-mean-square difference less than 0.1), with most match ups falling within the estimated uncertainties associated with the MODIS retrievals (about -10 to +50 ). The co-retrieved cloud optical depth was comparable to that of the MODIS operational cloud product for ACE-ASIA and SEAC4RS, however, higher by 30-50% for the SAFARI-2000 case study. The reason for this discrepancy could be attributed to the distinct aerosol optical properties encountered during respective campaigns. A brief discussion on the sources of uncertainty in the satellite-based ACAOD retrieval and co-location procedure is presented. Field experiments dedicated to making direct measurements of aerosols above cloud are needed for the extensive validation of satellite based retrievals.
Bibliografia:GSFC
E-ISSN: 1867-8548
Report Number: GSFC-E-DAA-TN41182
GSFC-E-DAA-TN41182
Goddard Space Flight Center
ISSN: 1867-1381
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1867-1381
1867-8548
1867-8548
DOI:10.5194/amt-9-5053-2016