DOI: 10.1016/j.atmosres.2018.07.004
Scopus记录号: 2-s2.0-85049928937
论文题名: Eighteen-year trends of local and non-local impacts to ambient PM10 in Hong Kong based on chemical speciation and source apportionment
作者: Zhang X. ; Yuan Z. ; Li W. ; Lau A.K.H. ; Yu J.Z. ; Fung J.C.H. ; Zheng J. ; Yu A.L.C.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 214 起始页码: 1
结束页码: 9
语种: 英语
英文关键词: Backward trajectory cluster analysis
; Hong Kong
; Local and non-local contribution
; Long-term trend
; Positive matrix factorization
Scopus关键词: Air pollution
; Chemical speciation
; Cluster analysis
; Coal industry
; Economic and social effects
; Emission control
; Factorization
; Inverse problems
; Matrix algebra
; Potential flow
; Regional planning
; Sulfur compounds
; Backward trajectory
; Hong-kong
; Long-term trend
; Nonlocal
; Positive Matrix Factorization
; Industrial economics
; ambient air
; atmospheric pollution
; cluster analysis
; matrix
; particulate matter
; source apportionment
; speciation (chemistry)
; trend analysis
; China
; Hong Kong
英文摘要: Along with rapid economic development in China in the past twenty years, air pollution has deteriorated significantly and then gradually improved afterwards. Emission changes in response to the economic development and control measures and their impacts to ambient pollution levels are thus of great scientific and policy-making implications. By using the eighteen-year PM10 speciation dataset that have been continuously collected at multiple stations over Hong Kong since 1998, we demonstrated a novel approach to identify long-term trends of local and non-local contributions to ambient PM10 in Hong Kong based on Positive Matrix Factorization source apportionment and backward trajectory cluster analysis. It is found that vehicle exhaust contribution had decreased from 9.9 μg·m−3 in 1998 to 3.4 μg·m−3 in 2015, corresponding to a 66% decrease. However, residual oil contribution increased threefold, which indicated ship emission needs to be primarily addressed in air pollution management in Hong Kong. The mostly non-local sources of secondary sulfate, industry, and coal / biomass burning all showed inverse V-shape trends during the eighteen years, indicating the dual roles of economic development and emission control in shaping the ambient pollution levels. Local contributions dominated for vehicle exhaust and aged sea salt, while non-local ones dominated for secondary sulfate, secondary nitrate, industry, and coal / biomass burning. Although with small fluctuations, non-local contributions consistently accounted for 63–70% of total PM10 during the eighteen years, similar as previous estimates using a different approach. Such a dominant non-local contribution highlights the importance of regional collaboration to reduce PM levels in Hong Kong. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108750
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; Hong Kong University of Science and TechnologyHong Kong, Hong Kong; Hong Kong Environmental Protection DepartmentHong Kong, Hong Kong
Recommended Citation:
Zhang X.,Yuan Z.,Li W.,et al. Eighteen-year trends of local and non-local impacts to ambient PM10 in Hong Kong based on chemical speciation and source apportionment[J]. Atmospheric Research,2018-01-01,214