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Multi-Year Analyses of Columnar Aerosol Optical and Microphysical Properties in Xi'an, a Megacity in Northwestern China
Su, Xiaoli1,2; Cao, Junji1,2; Li, Zhengqiang3; Li, Kaitao3; Xu, Hua3; Liu, Suixin1,2; Fan, Xuehua4
2018-08-01
Source PublicationREMOTE SENSING
Volume10Issue:8
SubtypeArticle
AbstractA thorough understanding of aerosol optical properties and their spatio-temporal variability are required to accurately evaluate aerosol effects in the climate system. In this study, a multi-year study of aerosol optical and microphysical properties was firstly performed in Xi'an based on three years of sun photometer remote sensing measurements from 2012 to 2015. The multi-year average of aerosol optical depth (AOD) at 440 nm was about 0.88 +/- 0.24 (mean +/- SD), while the averaged angstrom ngstrom Exponent (AE) between 440 and 870 nm was 1.02 +/- 0.15. The mean value of single scattering albedo (SSA) was around 0.89 +/- 0.03. Aerosol optical depth and AE showed different seasonal variation patterns. Aerosol optical depth was slightly higher in winter (0.99 +/- 0.36) than in other seasons (similar to 0.85 +/- 0.20), while AE showed its minimum in spring (0.85 +/- 0.05) due to the impact of dust episodes. The seasonal variations of volume particle size distribution, spectral refractive index, SSA, and asymmetry factor were also analyzed to characterize aerosols over this region. Based on the aerosol products derived from sun photometer measurements, the classification of aerosol types was also conducted using two different methods in this region. Results show that the dominant aerosol types are absorbers in all seasons, especially in winter, demonstrating the strong absorptivity of aerosols in Xi'an.
KeywordOptical And Microphysical Properties Sun Photometer Semi-arid Megacity
WOS HeadingsScience & Technology ; Technology
DOI10.3390/rs10081169
WOS KeywordSKY RADIANCE MEASUREMENTS ; REMOTE-SENSING MEASUREMENTS ; SUN PHOTOMETER MEASUREMENTS ; BLACK CARBON ; SUNPHOTOMETER MEASUREMENTS ; NORTHERN CHINA ; AERONET ; ATMOSPHERE ; NETWORK ; REGION
Indexed BySCI
Language英语
WOS Research AreaRemote Sensing
WOS SubjectRemote Sensing
WOS IDWOS:000443618100005
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5347
Collection粉尘与环境研究室
Affiliation1.Chinese Acad Sci, KLACP, Xian 710061, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Shaanxi, Peoples R China
3.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China
4.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Obser, LAGEO, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Su, Xiaoli,Cao, Junji,Li, Zhengqiang,et al. Multi-Year Analyses of Columnar Aerosol Optical and Microphysical Properties in Xi'an, a Megacity in Northwestern China[J]. REMOTE SENSING,2018,10(8).
APA Su, Xiaoli.,Cao, Junji.,Li, Zhengqiang.,Li, Kaitao.,Xu, Hua.,...&Fan, Xuehua.(2018).Multi-Year Analyses of Columnar Aerosol Optical and Microphysical Properties in Xi'an, a Megacity in Northwestern China.REMOTE SENSING,10(8).
MLA Su, Xiaoli,et al."Multi-Year Analyses of Columnar Aerosol Optical and Microphysical Properties in Xi'an, a Megacity in Northwestern China".REMOTE SENSING 10.8(2018).
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