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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ftdoajarticles:oai:doaj.org/article:5cee1aee935e46ee98ee009f86e5b294 2023-05-15T13:06:39+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 2016-05-01T00:00:00Z https://doi.org/10.3390/rs8050417 https://doaj.org/article/5cee1aee935e46ee98ee009f86e5b294 EN eng MDPI AG http://www.mdpi.com/2072-4292/8/5/417 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs8050417 https://doaj.org/article/5cee1aee935e46ee98ee009f86e5b294 Remote Sensing, Vol 8, Iss 5, p 417 (2016) multi-angular remote sensing polarized remote sensing aerosol optical depth fine-mode fraction PARASOL Science Q article 2016 ftdoajarticles https://doi.org/10.3390/rs8050417 2022-12-31T16:11:29Z 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. Article in Journal/Newspaper Aerosol Robotic Network Directory of Open Access Journals: DOAJ Articles Remote Sensing 8 5 417 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
multi-angular remote sensing polarized remote sensing aerosol optical depth fine-mode fraction PARASOL Science Q |
spellingShingle |
multi-angular remote sensing polarized remote sensing aerosol optical depth fine-mode fraction PARASOL Science Q 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 Science Q |
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 |
Article in Journal/Newspaper |
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 |
MDPI AG |
publishDate |
2016 |
url |
https://doi.org/10.3390/rs8050417 https://doaj.org/article/5cee1aee935e46ee98ee009f86e5b294 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Remote Sensing, Vol 8, Iss 5, p 417 (2016) |
op_relation |
http://www.mdpi.com/2072-4292/8/5/417 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs8050417 https://doaj.org/article/5cee1aee935e46ee98ee009f86e5b294 |
op_doi |
https://doi.org/10.3390/rs8050417 |
container_title |
Remote Sensing |
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8 |
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5 |
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417 |
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1766014653184344064 |