MAGARA: a Multi-Angle Geostationary Aerosol Retrieval Algorithm
For over 40 years, the Geostationary Operational Environmental Satellite (GOES) system has provided frequent snapshots of the Western Hemisphere. The advanced baseline imagers (ABIs) on the GOES-16, GOES-17, and GOES-18 platforms are the first GOES-series imagers that meet the precision requirements...
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ftdoajarticles:oai:doaj.org/article:30faf72aa5fc4f6982d5e4286c560caf 2024-02-27T08:32:32+00:00 MAGARA: a Multi-Angle Geostationary Aerosol Retrieval Algorithm J. A. Limbacher R. A. Kahn M. D. Friberg J. Lee T. Summers H. Zhang 2024-01-01T00:00:00Z https://doi.org/10.5194/amt-17-471-2024 https://doaj.org/article/30faf72aa5fc4f6982d5e4286c560caf EN eng Copernicus Publications https://amt.copernicus.org/articles/17/471/2024/amt-17-471-2024.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-17-471-2024 1867-1381 1867-8548 https://doaj.org/article/30faf72aa5fc4f6982d5e4286c560caf Atmospheric Measurement Techniques, Vol 17, Pp 471-498 (2024) Environmental engineering TA170-171 Earthwork. Foundations TA715-787 article 2024 ftdoajarticles https://doi.org/10.5194/amt-17-471-2024 2024-01-28T02:03:32Z For over 40 years, the Geostationary Operational Environmental Satellite (GOES) system has provided frequent snapshots of the Western Hemisphere. The advanced baseline imagers (ABIs) on the GOES-16, GOES-17, and GOES-18 platforms are the first GOES-series imagers that meet the precision requirements for high-quality, aerosol-related research. We present MAGARA, a Multi-Angle Geostationary Aerosol Retrieval Algorithm, that leverages multi-angle ABI imagery to exploit the differences in autocorrelation timescales between surface reflectance, aerosol type, and aerosol loading. MAGARA retrieves pixel-level (up to 1 km) aerosol loading and fine-mode fraction at up to the cadence of the measurements (10 min), fine- and coarse-mode aerosol particle properties at a daily cadence, and surface properties by combining the multi-angle radiances with robust surface characterization inherent to temporally tiled algorithms. We present three case studies, and because GOES-17 was not making observations for one case, we present this as a unique demonstration of the multi-angle algorithm using only a single ABI sensor. We also compare MAGARA retrievals of fine-mode (FM) aerosol optical depth (AOD), coarse-mode (CM) AOD, and single-scattering albedo (SSA) statistically, with coincident AErosol RObotic NETwork (AERONET) spectral deconvolution algorithm (SDA) and inversion retrievals for the same period, and against bias-corrected NOAA GOES-16 and GOES-17 retrieved 550 nm AOD. For MAGARA vs. coincident AERONET over-land 500 nm fine-mode fraction and AOD>0.3 , MAE=0.031 , RMSE=0.100 , and r =0.902 , indicating good sensitivity to fine-mode fraction over land, especially for smoky regions. For bias-corrected MAGARA vs. coincident AERONET spectral single-scattering albedo with MAGARA AOD>0.5 ( n =116 ), MAE=0.010 , RMSE=0.015 , and the correlation is 0.87. MAGARA performs best in regions where surface reflectance varies over long timescales with minimal clouds. This represents a large portion of the western half of the United ... Article in Journal/Newspaper Aerosol Robotic Network Directory of Open Access Journals: DOAJ Articles Atmospheric Measurement Techniques 17 2 471 498 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
spellingShingle |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 J. A. Limbacher R. A. Kahn M. D. Friberg J. Lee T. Summers H. Zhang MAGARA: a Multi-Angle Geostationary Aerosol Retrieval Algorithm |
topic_facet |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
description |
For over 40 years, the Geostationary Operational Environmental Satellite (GOES) system has provided frequent snapshots of the Western Hemisphere. The advanced baseline imagers (ABIs) on the GOES-16, GOES-17, and GOES-18 platforms are the first GOES-series imagers that meet the precision requirements for high-quality, aerosol-related research. We present MAGARA, a Multi-Angle Geostationary Aerosol Retrieval Algorithm, that leverages multi-angle ABI imagery to exploit the differences in autocorrelation timescales between surface reflectance, aerosol type, and aerosol loading. MAGARA retrieves pixel-level (up to 1 km) aerosol loading and fine-mode fraction at up to the cadence of the measurements (10 min), fine- and coarse-mode aerosol particle properties at a daily cadence, and surface properties by combining the multi-angle radiances with robust surface characterization inherent to temporally tiled algorithms. We present three case studies, and because GOES-17 was not making observations for one case, we present this as a unique demonstration of the multi-angle algorithm using only a single ABI sensor. We also compare MAGARA retrievals of fine-mode (FM) aerosol optical depth (AOD), coarse-mode (CM) AOD, and single-scattering albedo (SSA) statistically, with coincident AErosol RObotic NETwork (AERONET) spectral deconvolution algorithm (SDA) and inversion retrievals for the same period, and against bias-corrected NOAA GOES-16 and GOES-17 retrieved 550 nm AOD. For MAGARA vs. coincident AERONET over-land 500 nm fine-mode fraction and AOD>0.3 , MAE=0.031 , RMSE=0.100 , and r =0.902 , indicating good sensitivity to fine-mode fraction over land, especially for smoky regions. For bias-corrected MAGARA vs. coincident AERONET spectral single-scattering albedo with MAGARA AOD>0.5 ( n =116 ), MAE=0.010 , RMSE=0.015 , and the correlation is 0.87. MAGARA performs best in regions where surface reflectance varies over long timescales with minimal clouds. This represents a large portion of the western half of the United ... |
format |
Article in Journal/Newspaper |
author |
J. A. Limbacher R. A. Kahn M. D. Friberg J. Lee T. Summers H. Zhang |
author_facet |
J. A. Limbacher R. A. Kahn M. D. Friberg J. Lee T. Summers H. Zhang |
author_sort |
J. A. Limbacher |
title |
MAGARA: a Multi-Angle Geostationary Aerosol Retrieval Algorithm |
title_short |
MAGARA: a Multi-Angle Geostationary Aerosol Retrieval Algorithm |
title_full |
MAGARA: a Multi-Angle Geostationary Aerosol Retrieval Algorithm |
title_fullStr |
MAGARA: a Multi-Angle Geostationary Aerosol Retrieval Algorithm |
title_full_unstemmed |
MAGARA: a Multi-Angle Geostationary Aerosol Retrieval Algorithm |
title_sort |
magara: a multi-angle geostationary aerosol retrieval algorithm |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/amt-17-471-2024 https://doaj.org/article/30faf72aa5fc4f6982d5e4286c560caf |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Atmospheric Measurement Techniques, Vol 17, Pp 471-498 (2024) |
op_relation |
https://amt.copernicus.org/articles/17/471/2024/amt-17-471-2024.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-17-471-2024 1867-1381 1867-8548 https://doaj.org/article/30faf72aa5fc4f6982d5e4286c560caf |
op_doi |
https://doi.org/10.5194/amt-17-471-2024 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
17 |
container_issue |
2 |
container_start_page |
471 |
op_container_end_page |
498 |
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1792047476242382848 |