Classifying Aerosols Based on Fuzzy Clustering and Their Optical and Microphysical Properties Study in Beijing, China
Classification of Beijing aerosol is carried out based on clustering optical properties obtained from three Aerosol Robotic Network (AERONET) sites. The fuzzy c-mean (FCM) clustering algorithm is used to classify fourteen-year (2001–2014) observations, totally of 6,732 records, into six aerosol type...
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fthindawi:oai:hindawi.com:10.1155/2017/4197652 2023-05-15T13:06:13+02:00 Classifying Aerosols Based on Fuzzy Clustering and Their Optical and Microphysical Properties Study in Beijing, China Wenhao Zhang Hui Xu Fengjie Zheng 2017 https://doi.org/10.1155/2017/4197652 en eng Advances in Meteorology https://doi.org/10.1155/2017/4197652 Copyright © 2017 Wenhao Zhang et al. Research Article 2017 fthindawi https://doi.org/10.1155/2017/4197652 2019-05-26T08:46:49Z Classification of Beijing aerosol is carried out based on clustering optical properties obtained from three Aerosol Robotic Network (AERONET) sites. The fuzzy c-mean (FCM) clustering algorithm is used to classify fourteen-year (2001–2014) observations, totally of 6,732 records, into six aerosol types. They are identified as fine particle nonabsorbing, two kinds of fine particle moderately absorbing (fine-MA1 and fine-MA2), fine particle highly absorbing, polluted dust, and desert dust aerosol. These aerosol types exhibit obvious optical characteristics difference. While five of them show similarities with aerosol types identified elsewhere, the polluted dust aerosol has no comparable prototype. Then the membership degree, a significant parameter provided by fuzzy clustering, is used to analyze internal variation of optical properties of each aerosol type. Finally, temporal variations of aerosol types are investigated. The dominant aerosol types are polluted dust and desert dust in spring, fine particle nonabsorbing aerosol in summer, and fine particle highly absorbing aerosol in winter. The fine particle moderately absorbing aerosol occurs during the whole year. Optical properties of the six types can also be used for radiative forcing estimation and satellite aerosol retrieval. Additionally, methodology of this study can be applied to identify aerosol types on a global scale. Article in Journal/Newspaper Aerosol Robotic Network Hindawi Publishing Corporation Advances in Meteorology 2017 1 18 |
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Hindawi Publishing Corporation |
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fthindawi |
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English |
description |
Classification of Beijing aerosol is carried out based on clustering optical properties obtained from three Aerosol Robotic Network (AERONET) sites. The fuzzy c-mean (FCM) clustering algorithm is used to classify fourteen-year (2001–2014) observations, totally of 6,732 records, into six aerosol types. They are identified as fine particle nonabsorbing, two kinds of fine particle moderately absorbing (fine-MA1 and fine-MA2), fine particle highly absorbing, polluted dust, and desert dust aerosol. These aerosol types exhibit obvious optical characteristics difference. While five of them show similarities with aerosol types identified elsewhere, the polluted dust aerosol has no comparable prototype. Then the membership degree, a significant parameter provided by fuzzy clustering, is used to analyze internal variation of optical properties of each aerosol type. Finally, temporal variations of aerosol types are investigated. The dominant aerosol types are polluted dust and desert dust in spring, fine particle nonabsorbing aerosol in summer, and fine particle highly absorbing aerosol in winter. The fine particle moderately absorbing aerosol occurs during the whole year. Optical properties of the six types can also be used for radiative forcing estimation and satellite aerosol retrieval. Additionally, methodology of this study can be applied to identify aerosol types on a global scale. |
format |
Article in Journal/Newspaper |
author |
Wenhao Zhang Hui Xu Fengjie Zheng |
spellingShingle |
Wenhao Zhang Hui Xu Fengjie Zheng Classifying Aerosols Based on Fuzzy Clustering and Their Optical and Microphysical Properties Study in Beijing, China |
author_facet |
Wenhao Zhang Hui Xu Fengjie Zheng |
author_sort |
Wenhao Zhang |
title |
Classifying Aerosols Based on Fuzzy Clustering and Their Optical and Microphysical Properties Study in Beijing, China |
title_short |
Classifying Aerosols Based on Fuzzy Clustering and Their Optical and Microphysical Properties Study in Beijing, China |
title_full |
Classifying Aerosols Based on Fuzzy Clustering and Their Optical and Microphysical Properties Study in Beijing, China |
title_fullStr |
Classifying Aerosols Based on Fuzzy Clustering and Their Optical and Microphysical Properties Study in Beijing, China |
title_full_unstemmed |
Classifying Aerosols Based on Fuzzy Clustering and Their Optical and Microphysical Properties Study in Beijing, China |
title_sort |
classifying aerosols based on fuzzy clustering and their optical and microphysical properties study in beijing, china |
publisher |
Advances in Meteorology |
publishDate |
2017 |
url |
https://doi.org/10.1155/2017/4197652 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
https://doi.org/10.1155/2017/4197652 |
op_rights |
Copyright © 2017 Wenhao Zhang et al. |
op_doi |
https://doi.org/10.1155/2017/4197652 |
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Advances in Meteorology |
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2017 |
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