globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2019.117257
Title:
Variation of the aerosol optical properties and validation of MODIS AOD products over the eastern edge of the Tibetan Plateau based on ground-based remote sensing in 2017
Author: You Y.; Zhao T.; Xie Y.; Zheng Y.; Zhu J.; Xia J.; Cao L.; Wang C.; Che H.; Liao Y.; Duan J.; Zhou J.; Zhou X.
Source Publication: Atmospheric Environment
ISSN: 1352-2310
Publishing Year: 2020
Volume: 223
Language: 英语
Keyword: Aerosols ; Image resolution ; Photometers ; Photometry ; Radiometers ; Remote sensing ; Supercomputers ; Aerosol optical property ; MODIS ; Sun photometers ; Tibetan Plateau ; Validation ; Optical properties ; accuracy assessment ; aerosol ; algorithm ; ground-based measurement ; model validation ; MODIS ; optical depth ; particle size ; photometer ; remote sensing ; spatial resolution ; aerosol (environment) ; air temperature ; altitude ; Article ; boundary layer ; controlled study ; environmental aspects and related phenomena ; meteorology ; moderate resolution imaging spectroradiometer ; optical depth ; optics ; priority journal ; remote sensing ; spectroscopy ; spring ; summer ; sun ; Tibet ; China ; Litang ; Qinghai-Xizang Plateau ; Sichuan
Subject Area: Aerosol optical properties ; MODIS ; Sun photometer ; Tibetan plateau ; Validation
Abstract: The aerosol change over the Tibetan Plateau (TP) is poorly understood due to the scarcity of aerosol measurements over the TP. The aerosol optical properties were measured with a CE-318 sun photometer from January to December in 2017 at the Litang station (30.00°N, 100.16°E, 3950.5 m a.s.l.) over the eastern edge of the TP to characterize the variations in the aerosol optical properties and assess the applicability of MODIS AOD products at the eastern edge of TP. The analyses show that the annual mean aerosol optical depth at 440 nm (AOD440nm) is 0.08 ± 0.03. The mean annual Angström exponent between 440 and 870 nm (AE440–870nm) is 0.72 ± 0.23. The monthly-averaged AOD440nm exhibits a maximum (0.11 ± 0.04) in July and minimum (0.05 ± 0.02) in January, while the monthly mean AE440–870nm shows a maximum (1.08 ± 0.19) in July and minimum (0.48 ± 0.32) in February. The findings based on measured AOD440nm and AE440–870nm indicate low AOD, dominated by coarse particles in winter and fine particles in summer over the eastern TP edge. Three datasets of MODIS AOD products with 3 km spatial resolution as well as with 10 km spatial resolution based on Dark Target (DT) and Deep Blue (DB) algorithms are validated using the ground-based measurements over the eastern edge of the TP. Although the validations show a low accuracy of MODIS AOD products of the three datasets over this TP region, the MODIS AOD products based on the DB algorithm with 10 km resolution could be used in the atmospheric environment over the eastern edge of the TP based on the best match between AOD data and ground-based measurements, the lowest retrieval error, and the largest percentage falling within the expected error envelope. © 2020 Elsevier Ltd
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Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/160537
Appears in Collections:气候变化与战略

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Affiliation: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, PREMIC, Nanjing University of Information Science and Technology, Nanjing, 210044, China; School of Geographical Sciences, Nanjing University of Information Science and Technology, Nanjing, 210044, China; State Key Lab of Severe Weather, Key Laboratory for Atmospheric Chemistry, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Guizhou Institute of Mountainous Climate and Environment, Guizhou Key Laboratory of Mountainous Climate and Resource, Guiyang, 550002, China

Recommended Citation:
You Y.,Zhao T.,Xie Y.,et al. Variation of the aerosol optical properties and validation of MODIS AOD products over the eastern edge of the Tibetan Plateau based on ground-based remote sensing in 2017[J]. Atmospheric Environment,2020-01-01,223
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