Analysis of Aerosol Optical Depth from Sun Photometer at Shouxian, China
We use two cloud screening methods—the clustering method and the multiplet method—to process the measurements of a sun photometer from March 2020 to April 2021 in Shouxian. The aerosol optical depth (AOD) and Angström parameters α and β are retrieved; variation characteristics and single scattering...
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| Format: | Article |
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MDPI AG
2021-09-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/12/9/1226 |
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| author | Lina Xun Hui Lu Congcong Qian Yong Zhang Shanshan Lyu Xin Li |
| author_facet | Lina Xun Hui Lu Congcong Qian Yong Zhang Shanshan Lyu Xin Li |
| author_sort | Lina Xun |
| collection | DOAJ |
| description | We use two cloud screening methods—the clustering method and the multiplet method—to process the measurements of a sun photometer from March 2020 to April 2021 in Shouxian. The aerosol optical depth (AOD) and Angström parameters α and β are retrieved; variation characteristics and single scattering albedo are studied. The results show that: (1) The fitting coefficient of AOD retrieved by the two methods is 0.921, and the changing trend is consistent. The clustering method has fewer effective data points and days, reducing the overall average of AOD by 0.0542 (500 nm). (2) Diurnal variation of AOD can be divided into flat type, convex type, and concave type. Concave type and convex type occurred the most frequently, whereas flat type the least. (3) During observation, the overall average of AOD is 0.48, which is relatively high. Among them, AOD had a winter maximum (0.70), autumn and spring next (0.54 and 0.40), and a summer minimum (0.26). The variation trend of AOD and β is highly consistent, and the monthly mean of α is between 0.69 and 1.61, concerning mainly continental and urban aerosols. (4) Compared with others, the single scattering albedo in Shouxian is higher, reflecting strong scattering and weak aerosol absorption. |
| first_indexed | 2024-03-10T07:54:38Z |
| format | Article |
| id | doaj.art-e1cf43c765de4a3fbb6f1b35a8720b20 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T07:54:38Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-e1cf43c765de4a3fbb6f1b35a8720b202023-11-22T12:01:08ZengMDPI AGAtmosphere2073-44332021-09-01129122610.3390/atmos12091226Analysis of Aerosol Optical Depth from Sun Photometer at Shouxian, ChinaLina Xun0Hui Lu1Congcong Qian2Yong Zhang3Shanshan Lyu4Xin Li5School of Artificial Intelligence, Anhui University, Hefei 230601, ChinaSchool of Electrical Engineering and Automation, Anhui University, Hefei 230601, ChinaSchool of Electrical Engineering and Automation, Anhui University, Hefei 230601, ChinaChina Meteorological Administration, Beijing 100081, ChinaChina Meteorological Administration, Beijing 100081, ChinaKey Laboratory of General Optical Calibration and Characterization Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, ChinaWe use two cloud screening methods—the clustering method and the multiplet method—to process the measurements of a sun photometer from March 2020 to April 2021 in Shouxian. The aerosol optical depth (AOD) and Angström parameters α and β are retrieved; variation characteristics and single scattering albedo are studied. The results show that: (1) The fitting coefficient of AOD retrieved by the two methods is 0.921, and the changing trend is consistent. The clustering method has fewer effective data points and days, reducing the overall average of AOD by 0.0542 (500 nm). (2) Diurnal variation of AOD can be divided into flat type, convex type, and concave type. Concave type and convex type occurred the most frequently, whereas flat type the least. (3) During observation, the overall average of AOD is 0.48, which is relatively high. Among them, AOD had a winter maximum (0.70), autumn and spring next (0.54 and 0.40), and a summer minimum (0.26). The variation trend of AOD and β is highly consistent, and the monthly mean of α is between 0.69 and 1.61, concerning mainly continental and urban aerosols. (4) Compared with others, the single scattering albedo in Shouxian is higher, reflecting strong scattering and weak aerosol absorption.https://www.mdpi.com/2073-4433/12/9/1226aerosol optical depth (AOD)clusteringmultipletShouxiansun photometer |
| spellingShingle | Lina Xun Hui Lu Congcong Qian Yong Zhang Shanshan Lyu Xin Li Analysis of Aerosol Optical Depth from Sun Photometer at Shouxian, China Atmosphere aerosol optical depth (AOD) clustering multiplet Shouxian sun photometer |
| title | Analysis of Aerosol Optical Depth from Sun Photometer at Shouxian, China |
| title_full | Analysis of Aerosol Optical Depth from Sun Photometer at Shouxian, China |
| title_fullStr | Analysis of Aerosol Optical Depth from Sun Photometer at Shouxian, China |
| title_full_unstemmed | Analysis of Aerosol Optical Depth from Sun Photometer at Shouxian, China |
| title_short | Analysis of Aerosol Optical Depth from Sun Photometer at Shouxian, China |
| title_sort | analysis of aerosol optical depth from sun photometer at shouxian china |
| topic | aerosol optical depth (AOD) clustering multiplet Shouxian sun photometer |
| url | https://www.mdpi.com/2073-4433/12/9/1226 |
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