DOI: 10.1016/j.atmosenv.2020.117619
论文题名: Characteristics, distribution, and sources of particulate carbon in rainfall collected by a sequential sampler in Nanchang, China
作者: Zou C. ; Zhang Y. ; Gao Y. ; Mao X. ; Huang H. ; Tan Y.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 235 语种: 英语
英文关键词: Rain
; Atmospheric particles
; Atmospheric particulate matter
; Carbon compounds
; Changing distributions
; Particulate carbon
; Precipitation events
; Precipitation intensity
; Precipitation process
; Particles (particulate matter)
; cloud water
; concentration (composition)
; correlation
; elemental carbon
; particle size
; particulate organic matter
; precipitation intensity
; rainfall
; sampler
; solubility
; China
; Jiangxi
; Nanchang
学科: EC
; Particulate carbon
; Precipitation collected sequentially
; WIOC
中文摘要: Wet deposition is the most important sink of atmospheric particulate matter. Although some studies have evaluated the concentrations of particulate carbon in rainfall, few have analyzed the changing distribution of particulate carbon during the precipitation process. Automatic sequential rainfall collections were obtained in Nanchang City, China, using a 4 mm precipitation interval, and the concentrations of water-insoluble carbon compounds (WIOC) and elemental carbon (EC) were evaluated. The concentrations of WIOC and EC in each 4 mm fraction were precisely determined, and the sources of WIOC and EC were analyzed. The concentrations of WIOC and EC in Nanchang precipitation ranged from 0.0012 mg L−1 to 3.55 mg L−1 and from 0.0061 mg L−1 to 2.30 mg L−1, respectively. WIOC and EC varied greatly among precipitation events and decreased gradually during individual events. Higher precipitation intensity caused greater rates of sub-cloud carbon wash-out and decreasing concentrations of carbon in precipitation. The WIOC/EC ratio during most rainfall events was about 2, but the ratio during the last stage of rainfall often exceeded 2. The correlation between WIOC and EC in the first two 4 mm precipitation fractions was very high, while the correlation between WIOC and EC in the last two fractions was weaker. The majority of WIOC and EC in precipitation originated in sub-cloud atmospheric particles, though a significant percentage of WIOC and EC in the final fraction of precipitation originated from cloud water. As a precipitation event progressed, the contribution of sub-cloud particulate carbon decreased, while the contribution of particulate carbon in cloud water increased. © 2020 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160255
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources Environmental and Chemical Engineering, Nanchang University, Nanchang, China
Recommended Citation:
Zou C.,Zhang Y.,Gao Y.,et al. Characteristics, distribution, and sources of particulate carbon in rainfall collected by a sequential sampler in Nanchang, China[J]. Atmospheric Environment,2020-01-01,235