Variability of Major Aerosol Types in China Classified Using AERONET Measurements
Aerosol type is a critical piece of information in both aerosol forcing estimation and passive satellite remote sensing. However, the major aerosol types in China and their variability is still less understood. This work uses direct sun measurements and inversion derived parameters from 47 sites wit...
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ftdoajarticles:oai:doaj.org/article:b04051304c0247fe83c13337c2840db7 2023-05-15T13:06:19+02:00 Variability of Major Aerosol Types in China Classified Using AERONET Measurements Lu Zhang Jing Li 2019-10-01T00:00:00Z https://doi.org/10.3390/rs11202334 https://doaj.org/article/b04051304c0247fe83c13337c2840db7 EN eng MDPI AG https://www.mdpi.com/2072-4292/11/20/2334 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs11202334 https://doaj.org/article/b04051304c0247fe83c13337c2840db7 Remote Sensing, Vol 11, Iss 20, p 2334 (2019) aerosol type classification spatial and temporal variability Science Q article 2019 ftdoajarticles https://doi.org/10.3390/rs11202334 2022-12-31T16:05:42Z Aerosol type is a critical piece of information in both aerosol forcing estimation and passive satellite remote sensing. However, the major aerosol types in China and their variability is still less understood. This work uses direct sun measurements and inversion derived parameters from 47 sites within the Aerosol Robotic Network (AERONET) in China, with more than 39,000 records obtained between April 1998 and January 2017, to identify dominant aerosol types using two independent methods, namely, K means and Self Organizing Map (SOM). In total, we define four aerosol types, namely, desert dust, scattering mixed, absorbing mixed and scattering fine, based on their optical and microphysical characteristics. Seasonally, dust aerosols mainly occur in the spring and over North and Northwest China; scattering mixed are more common in the spring and summer, whereas absorbing aerosols mostly occur in the autumn and winter during heating period, and scattering fine aerosols have their highest occurrence frequency in summer over East China. Based on their spatial and temporal distribution, we also generate seasonal aerosol type maps that can be used for passive satellite retrieval. Compared with the global models used in most satellite retrieval algorithms, the unique feature of East Asian aerosols is the curved single scattering albedo spectrum, which could be related to the mixing of black carbon with dust or organic aerosols. Article in Journal/Newspaper Aerosol Robotic Network Directory of Open Access Journals: DOAJ Articles Remote Sensing 11 20 2334 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
aerosol type classification spatial and temporal variability Science Q |
spellingShingle |
aerosol type classification spatial and temporal variability Science Q Lu Zhang Jing Li Variability of Major Aerosol Types in China Classified Using AERONET Measurements |
topic_facet |
aerosol type classification spatial and temporal variability Science Q |
description |
Aerosol type is a critical piece of information in both aerosol forcing estimation and passive satellite remote sensing. However, the major aerosol types in China and their variability is still less understood. This work uses direct sun measurements and inversion derived parameters from 47 sites within the Aerosol Robotic Network (AERONET) in China, with more than 39,000 records obtained between April 1998 and January 2017, to identify dominant aerosol types using two independent methods, namely, K means and Self Organizing Map (SOM). In total, we define four aerosol types, namely, desert dust, scattering mixed, absorbing mixed and scattering fine, based on their optical and microphysical characteristics. Seasonally, dust aerosols mainly occur in the spring and over North and Northwest China; scattering mixed are more common in the spring and summer, whereas absorbing aerosols mostly occur in the autumn and winter during heating period, and scattering fine aerosols have their highest occurrence frequency in summer over East China. Based on their spatial and temporal distribution, we also generate seasonal aerosol type maps that can be used for passive satellite retrieval. Compared with the global models used in most satellite retrieval algorithms, the unique feature of East Asian aerosols is the curved single scattering albedo spectrum, which could be related to the mixing of black carbon with dust or organic aerosols. |
format |
Article in Journal/Newspaper |
author |
Lu Zhang Jing Li |
author_facet |
Lu Zhang Jing Li |
author_sort |
Lu Zhang |
title |
Variability of Major Aerosol Types in China Classified Using AERONET Measurements |
title_short |
Variability of Major Aerosol Types in China Classified Using AERONET Measurements |
title_full |
Variability of Major Aerosol Types in China Classified Using AERONET Measurements |
title_fullStr |
Variability of Major Aerosol Types in China Classified Using AERONET Measurements |
title_full_unstemmed |
Variability of Major Aerosol Types in China Classified Using AERONET Measurements |
title_sort |
variability of major aerosol types in china classified using aeronet measurements |
publisher |
MDPI AG |
publishDate |
2019 |
url |
https://doi.org/10.3390/rs11202334 https://doaj.org/article/b04051304c0247fe83c13337c2840db7 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Remote Sensing, Vol 11, Iss 20, p 2334 (2019) |
op_relation |
https://www.mdpi.com/2072-4292/11/20/2334 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs11202334 https://doaj.org/article/b04051304c0247fe83c13337c2840db7 |
op_doi |
https://doi.org/10.3390/rs11202334 |
container_title |
Remote Sensing |
container_volume |
11 |
container_issue |
20 |
container_start_page |
2334 |
_version_ |
1766000417072742400 |