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© 2019. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

This study presents and evaluates an updated algorithm for quantification of absorbing aerosols above clouds (AACs) from passive satellite measurements. The focus is biomass burning in the south-eastern Atlantic Ocean during the 2016 and 2017 ObseRvations of Aerosols above CLouds and their intEractionS (ORACLES) field campaign deployments. The algorithm retrieves the above-cloud aerosol optical depth (AOD) and underlying liquid cloud optical depth and is applied to measurements from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS), Moderate Resolution Imaging Spectroradiometer (MODIS), and Visible Infrared Imaging Radiometer Suite (VIIRS) from 1997 to 2017. Airborne NASA Ames Spectrometers for Sky-Scanning, Sun-Tracking Atmospheric Research (4STAR) and NASA Langley High Spectral Resolution Lidar 2 (HSRL2) data collected during ORACLES provide important validation for spectral AOD for MODIS and VIIRS; as the SeaWiFS mission ended in 2010, it cannot be evaluated directly. The 4STAR and HSRL2 comparisons are complementary and reveal performance generally in line with uncertainty estimates provided by the optimal estimation retrieval framework used. At present the two MODIS-based data records seem the most reliable, although there are differences between the deployments, which may indicate that the available data are not yet sufficient to provide a robust regional validation. Spatiotemporal patterns in the data sets are similar, and the time series are very strongly correlated with each other (correlation coefficients from 0.95 to 0.99). Offsets between the satellite data sets are thought to be chiefly due to differences in absolute calibration between the sensors. The available validation data for this type of algorithm are limited to a small number of field campaigns, and it is strongly recommended that such airborne measurements continue to be made, both over the southern Atlantic Ocean and elsewhere.

Details

Title
Two decades observing smoke above clouds in the south-eastern Atlantic Ocean: Deep Blue algorithm updates and validation with ORACLES field campaign data
Author
Sayer, Andrew M 1   VIAFID ORCID Logo  ; Hsu, N Christina 2 ; Lee, Jaehwa 3 ; Kim, Woogyung V 3   VIAFID ORCID Logo  ; Burton, Sharon 4 ; Fenn, Marta A 5 ; Ferrare, Richard A 4 ; Kacenelenbogen, Meloë 6 ; LeBlanc, Samuel 6   VIAFID ORCID Logo  ; Pistone, Kristina 6   VIAFID ORCID Logo  ; Redemann, Jens 7   VIAFID ORCID Logo  ; Segal-Rozenhaimer, Michal 6 ; Shinozuka, Yohei 8 ; Si-Chee Tsay 2 

 GESTAR, Universities Space Research Association, Columbia, MD, USA; NASA Goddard Space Flight Center, Greenbelt, MD, USA 
 NASA Goddard Space Flight Center, Greenbelt, MD, USA 
 NASA Goddard Space Flight Center, Greenbelt, MD, USA; University of Maryland, College Park, MD, USA 
 NASA Langley Research Center, Hampton, VA, USA 
 NASA Langley Research Center, Hampton, VA, USA; Science Systems and Applications, Inc, Hampton, VA, USA 
 Bay Area Environmental Research Institute, Moffett Field, CA, USA; NASA Ames Research Center, Moffett Field, CA, USA 
 University of Oklahoma, Norman, OK, USA 
 NASA Ames Research Center, Moffett Field, CA, USA; Universities Space Research Association, Mountain View, CA, USA 
Pages
3595-3627
Publication year
2019
Publication date
2019
Publisher
Copernicus GmbH
ISSN
18671381
e-ISSN
18678548
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2251614519
Copyright
© 2019. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.