An Evaluation of MODIS-Retrieved Aerosol Optical Depth over AERONET Sites in Alaska

The air quality monitoring network in Alaska is currently limited to ground-based observations in urban areas and national parks, leaving a large proportion of the state unmonitored. The use of Moderate Resolution Imaging Spectroradiometer MODIS aerosol optical depth (AOD) to estimate ground-level p...

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Published in:Remote Sensing
Main Authors: Alyson McPhetres, Srijan Aggarwal
Format: Text
Language:English
Published: Multidisciplinary Digital Publishing Institute 2018
Subjects:
Online Access:https://doi.org/10.3390/rs10091384
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spelling ftmdpi:oai:mdpi.com:/2072-4292/10/9/1384/ 2023-08-20T03:59:10+02:00 An Evaluation of MODIS-Retrieved Aerosol Optical Depth over AERONET Sites in Alaska Alyson McPhetres Srijan Aggarwal 2018-08-31 application/pdf https://doi.org/10.3390/rs10091384 EN eng Multidisciplinary Digital Publishing Institute Atmosphere Remote Sensing https://dx.doi.org/10.3390/rs10091384 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 10; Issue 9; Pages: 1384 Aerosol Optical Depth Moderate Resolution Imaging Spectroradiometer Alaska Aerosol Robotic Network air quality Text 2018 ftmdpi https://doi.org/10.3390/rs10091384 2023-07-31T21:42:14Z The air quality monitoring network in Alaska is currently limited to ground-based observations in urban areas and national parks, leaving a large proportion of the state unmonitored. The use of Moderate Resolution Imaging Spectroradiometer MODIS aerosol optical depth (AOD) to estimate ground-level particulate pollution concentrations has been successfully demonstrated around the world and could potentially be used in Alaska. In this work, MODIS AOD measurements at 550 nm were validated against AOD derived from two ground-based Aerosol Robotic Network (AERONET) sunphotometers in Alaska, located at Utqiagvik (previously known as Barrow) and Bonanza Creek, to determine if MODIS AOD from the Terra and Aqua satellites could be used to estimate ground-level particulate pollution concentrations. The MODIS AOD was obtained from MODIS collection 6 using the dark target Land and Ocean algorithms from years 2000 to 2014. MODIS data could only be obtained between the months of April and October; therefore, it was only evaluated for those months. Individual and combined Terra and Aqua MODIS data were considered. The results showed that MODIS collection 6 products at 10-km resolution for Terra and Aqua combined are not valid over land but are valid over the ocean. Note that the individual Terra and Aqua MODIS collection 6 AOD products at 10-km resolution are valid over land individually but not when combined. Results also suggest the MODIS collection 6 AOD products at 3-km resolution are valid over land and ocean and perform better over land than the 10-km product. These findings indicate that MODIS collection 6 AOD products can be used quantitatively in air quality applications in Alaska during the summer months. Text Aerosol Robotic Network Barrow Alaska MDPI Open Access Publishing Bonanza ENVELOPE(-119.820,-119.820,55.917,55.917) Remote Sensing 10 9 1384
institution Open Polar
collection MDPI Open Access Publishing
op_collection_id ftmdpi
language English
topic Aerosol Optical Depth
Moderate Resolution Imaging Spectroradiometer
Alaska
Aerosol Robotic Network
air quality
spellingShingle Aerosol Optical Depth
Moderate Resolution Imaging Spectroradiometer
Alaska
Aerosol Robotic Network
air quality
Alyson McPhetres
Srijan Aggarwal
An Evaluation of MODIS-Retrieved Aerosol Optical Depth over AERONET Sites in Alaska
topic_facet Aerosol Optical Depth
Moderate Resolution Imaging Spectroradiometer
Alaska
Aerosol Robotic Network
air quality
description The air quality monitoring network in Alaska is currently limited to ground-based observations in urban areas and national parks, leaving a large proportion of the state unmonitored. The use of Moderate Resolution Imaging Spectroradiometer MODIS aerosol optical depth (AOD) to estimate ground-level particulate pollution concentrations has been successfully demonstrated around the world and could potentially be used in Alaska. In this work, MODIS AOD measurements at 550 nm were validated against AOD derived from two ground-based Aerosol Robotic Network (AERONET) sunphotometers in Alaska, located at Utqiagvik (previously known as Barrow) and Bonanza Creek, to determine if MODIS AOD from the Terra and Aqua satellites could be used to estimate ground-level particulate pollution concentrations. The MODIS AOD was obtained from MODIS collection 6 using the dark target Land and Ocean algorithms from years 2000 to 2014. MODIS data could only be obtained between the months of April and October; therefore, it was only evaluated for those months. Individual and combined Terra and Aqua MODIS data were considered. The results showed that MODIS collection 6 products at 10-km resolution for Terra and Aqua combined are not valid over land but are valid over the ocean. Note that the individual Terra and Aqua MODIS collection 6 AOD products at 10-km resolution are valid over land individually but not when combined. Results also suggest the MODIS collection 6 AOD products at 3-km resolution are valid over land and ocean and perform better over land than the 10-km product. These findings indicate that MODIS collection 6 AOD products can be used quantitatively in air quality applications in Alaska during the summer months.
format Text
author Alyson McPhetres
Srijan Aggarwal
author_facet Alyson McPhetres
Srijan Aggarwal
author_sort Alyson McPhetres
title An Evaluation of MODIS-Retrieved Aerosol Optical Depth over AERONET Sites in Alaska
title_short An Evaluation of MODIS-Retrieved Aerosol Optical Depth over AERONET Sites in Alaska
title_full An Evaluation of MODIS-Retrieved Aerosol Optical Depth over AERONET Sites in Alaska
title_fullStr An Evaluation of MODIS-Retrieved Aerosol Optical Depth over AERONET Sites in Alaska
title_full_unstemmed An Evaluation of MODIS-Retrieved Aerosol Optical Depth over AERONET Sites in Alaska
title_sort evaluation of modis-retrieved aerosol optical depth over aeronet sites in alaska
publisher Multidisciplinary Digital Publishing Institute
publishDate 2018
url https://doi.org/10.3390/rs10091384
long_lat ENVELOPE(-119.820,-119.820,55.917,55.917)
geographic Bonanza
geographic_facet Bonanza
genre Aerosol Robotic Network
Barrow
Alaska
genre_facet Aerosol Robotic Network
Barrow
Alaska
op_source Remote Sensing; Volume 10; Issue 9; Pages: 1384
op_relation Atmosphere Remote Sensing
https://dx.doi.org/10.3390/rs10091384
op_rights https://creativecommons.org/licenses/by/4.0/
op_doi https://doi.org/10.3390/rs10091384
container_title Remote Sensing
container_volume 10
container_issue 9
container_start_page 1384
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