Retrieval of Aerosol Fine-Mode Fraction from Intensity and Polarization Measurements by PARASOL over East Asia
The fine-mode fraction (FMF) of aerosol optical depth (AOD) is a key optical parameter that represents the proportion of fine particles relative to total aerosols in the atmosphere. However, in comparison to ground-based measurements, the FMF is still difficult to retrieve from satellite observation...
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ftmdpi:oai:mdpi.com:/2072-4292/8/5/417/ 2023-08-20T03:59:11+02:00 Retrieval of Aerosol Fine-Mode Fraction from Intensity and Polarization Measurements by PARASOL over East Asia Yang Zhang Zhengqiang Li Lili Qie Ying Zhang Zhihong Liu Xingfeng Chen Weizhen Hou Kaitao Li Donghui Li Hua Xu agris 2016-05-16 application/pdf https://doi.org/10.3390/rs8050417 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/rs8050417 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 8; Issue 5; Pages: 417 multi-angular remote sensing polarized remote sensing aerosol optical depth fine-mode fraction PARASOL Text 2016 ftmdpi https://doi.org/10.3390/rs8050417 2023-07-31T20:53:18Z The fine-mode fraction (FMF) of aerosol optical depth (AOD) is a key optical parameter that represents the proportion of fine particles relative to total aerosols in the atmosphere. However, in comparison to ground-based measurements, the FMF is still difficult to retrieve from satellite observations, as attempted by a Moderate-resolution Imaging Spectroradiometer (MODIS) algorithm. In this paper, we introduce the retrieval of FMF based on Polarization and Anisotropy of Reflectances for Atmospheric Science coupled with Observations from a Lidar (PARASOL) data. This method takes advantage of the coincident multi-angle intensity and polarization measurements from a single satellite platform. In our method, we use intensity measurements to retrieve the total AOD and polarization measurements to retrieve the fine-mode AOD. The FMF is then calculated as the ratio of the retrieved fine-mode AOD to the total AOD. The important processes in our method include the estimation of the surface intensity and polarized reflectance by using two semi-empirical models, and the building of two sets of aerosol retrieval lookup tables for the intensity and polarized measurements via the 6SV radiative transfer code. We apply this method to East Asia, and comparisons of the retrieved FMFs for the Beijing, Xianghe and Seoul_SNU sites with those of the Aerosol Robotic Network (AERONET) ground-based observations produce correlation coefficients (R2) of 0.838, 0.818, and 0.877, respectively. However, the comparison results are relatively poor (R2 = 0.537) in low-AOD areas, such as the Osaka site, due to the low signal-to-noise ratio of the satellite observations. Text Aerosol Robotic Network MDPI Open Access Publishing Remote Sensing 8 5 417 |
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Open Polar |
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MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
multi-angular remote sensing polarized remote sensing aerosol optical depth fine-mode fraction PARASOL |
spellingShingle |
multi-angular remote sensing polarized remote sensing aerosol optical depth fine-mode fraction PARASOL Yang Zhang Zhengqiang Li Lili Qie Ying Zhang Zhihong Liu Xingfeng Chen Weizhen Hou Kaitao Li Donghui Li Hua Xu Retrieval of Aerosol Fine-Mode Fraction from Intensity and Polarization Measurements by PARASOL over East Asia |
topic_facet |
multi-angular remote sensing polarized remote sensing aerosol optical depth fine-mode fraction PARASOL |
description |
The fine-mode fraction (FMF) of aerosol optical depth (AOD) is a key optical parameter that represents the proportion of fine particles relative to total aerosols in the atmosphere. However, in comparison to ground-based measurements, the FMF is still difficult to retrieve from satellite observations, as attempted by a Moderate-resolution Imaging Spectroradiometer (MODIS) algorithm. In this paper, we introduce the retrieval of FMF based on Polarization and Anisotropy of Reflectances for Atmospheric Science coupled with Observations from a Lidar (PARASOL) data. This method takes advantage of the coincident multi-angle intensity and polarization measurements from a single satellite platform. In our method, we use intensity measurements to retrieve the total AOD and polarization measurements to retrieve the fine-mode AOD. The FMF is then calculated as the ratio of the retrieved fine-mode AOD to the total AOD. The important processes in our method include the estimation of the surface intensity and polarized reflectance by using two semi-empirical models, and the building of two sets of aerosol retrieval lookup tables for the intensity and polarized measurements via the 6SV radiative transfer code. We apply this method to East Asia, and comparisons of the retrieved FMFs for the Beijing, Xianghe and Seoul_SNU sites with those of the Aerosol Robotic Network (AERONET) ground-based observations produce correlation coefficients (R2) of 0.838, 0.818, and 0.877, respectively. However, the comparison results are relatively poor (R2 = 0.537) in low-AOD areas, such as the Osaka site, due to the low signal-to-noise ratio of the satellite observations. |
format |
Text |
author |
Yang Zhang Zhengqiang Li Lili Qie Ying Zhang Zhihong Liu Xingfeng Chen Weizhen Hou Kaitao Li Donghui Li Hua Xu |
author_facet |
Yang Zhang Zhengqiang Li Lili Qie Ying Zhang Zhihong Liu Xingfeng Chen Weizhen Hou Kaitao Li Donghui Li Hua Xu |
author_sort |
Yang Zhang |
title |
Retrieval of Aerosol Fine-Mode Fraction from Intensity and Polarization Measurements by PARASOL over East Asia |
title_short |
Retrieval of Aerosol Fine-Mode Fraction from Intensity and Polarization Measurements by PARASOL over East Asia |
title_full |
Retrieval of Aerosol Fine-Mode Fraction from Intensity and Polarization Measurements by PARASOL over East Asia |
title_fullStr |
Retrieval of Aerosol Fine-Mode Fraction from Intensity and Polarization Measurements by PARASOL over East Asia |
title_full_unstemmed |
Retrieval of Aerosol Fine-Mode Fraction from Intensity and Polarization Measurements by PARASOL over East Asia |
title_sort |
retrieval of aerosol fine-mode fraction from intensity and polarization measurements by parasol over east asia |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2016 |
url |
https://doi.org/10.3390/rs8050417 |
op_coverage |
agris |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Remote Sensing; Volume 8; Issue 5; Pages: 417 |
op_relation |
https://dx.doi.org/10.3390/rs8050417 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs8050417 |
container_title |
Remote Sensing |
container_volume |
8 |
container_issue |
5 |
container_start_page |
417 |
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1774719898191134720 |