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- Title
VIIRS Deep Blue Aerosol Products Over Land: Extending the EOS Long‐Term Aerosol Data Records.
- Authors
Hsu, N. C.; Lee, J.; Sayer, A. M.; Kim, W.; Bettenhausen, C.; Tsay, S.‐C.
- Abstract
A primary goal of the Deep Blue (DB) project is to create consistent long‐term aerosol data records, suitable for climate studies, using multiple satellite instruments. In order to continue Earth Observing System (EOS)‐era aerosol products into the Joint Polar Satellite System era, we have successfully ported the DB algorithm to process data from the Visible Infrared Imaging Radiometer Suite (VIIRS). Although the basic structure of the VIIRS algorithm is similar to that for the Moderate Resolution Imaging Spectroradiometer (MODIS), many enhancements have been made compared to the MODIS collection 6 (C6) version. Most have also been implemented in the latest MODIS Collection 6.1 (C6.1). For example, a new smoke mask was developed based on the spectral curvature of measured reflectance to distinguish biomass burning smoke from weakly absorbing urban/industrial aerosols. Consequently, a new aerosol‐type flag was added into the VIIRS DB data set. In addition, new dust models have been developed to account for the nonsphericity of mineral dust. As a result, a discontinuity in the retrieved aerosol optical depth (AOD) of Saharan dust plumes seen in MODIS C6 products near the boundary between North Africa and the Atlantic has been much reduced. We have also evaluated the VIIRS and MODIS Terra/Aqua C6.1 AOD against Aerosol Robotic Network data. VIIRS and MODIS retrievals show similar performance; around 80% of matchups agree with Aerosol Robotic Network within the expected error of ±(0.05 + 20)%, indicating that DB can provide consistent AOD through the historical EOS and present Joint Polar Satellite System eras. Key Points: The Deep Blue algorithm can now be applied to VIIRS measurements and provide global aerosol information over land and oceanNew aerosol‐type product has been added into VIIRS Deep Blue data suite, which can distinguish biomass burning smoke from other aerosolsThe comparisons between MODIS and VIIRS aerosol time series indicate good consistency in AOD between these sensors
- Subjects
AEROSOLS; BIOMASS; RADIOMETERS; SPECTRORADIOMETER; REFLECTANCE
- Publication
Journal of Geophysical Research. Atmospheres, 2019, Vol 124, Issue 7, p4026
- ISSN
2169-897X
- Publication type
Article
- DOI
10.1029/2018JD029688