DOI: 10.1002/2016JD025728
论文题名: Seasonality of the mass concentration and chemical composition of aerosols around an urbanized basin in East Asia
作者: Chou C.C.-K. ; Hsu W.-C. ; Chang S.-Y. ; Chen W.-N. ; Chen M.-J. ; Huang W.-R. ; Huang S.-H. ; Tsai C.-Y. ; Chang S.-C. ; Lee C.-T. ; Liu S.-C.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 3 起始页码: 2026
结束页码: 2042
语种: 英语
英文关键词: Asian outflows
; particulate matters
; seasonal variations
; urban aerosols
Scopus关键词: aerosol
; chemical composition
; concentration (composition)
; correlation
; dust
; outflow
; particulate matter
; photolysis
; pollutant transport
; seasonality
; sensitivity analysis
; spatiotemporal analysis
; surface wind
; urban area
; wind velocity
; Taiwan
英文摘要: This study investigated seasonal variations in the mass concentration and chemical composition of ambient aerosols observed at three stations (coastal, mountainous, and downtown sites) in northern Taiwan from March 2009 to February 2012. The results show that the major aerosol components include ammonium, sulfate, nitrate, sea salt, dust, organic carbon, and elemental carbon, whereas the mass fraction of each species depends on the sampling location and season. A significant correlation (r = 0.7–0.8) was observed in aerosol concentrations measured at the respective stations, indicating that aerosol concentrations were dominated by regional-scale factors. Ammonium, sulfate, and nitrate consistently reached respective peak values in the spring in conjunction with dust particle levels. This shows that the transport of dust and particulate air pollutants from the Asian continent has affected the atmospheric environment in this area. Distinct seasonality was observed for sea salt and secondary organic carbon (SOC): sea salt levels peaked in the autumn, whereas SOC levels peaked in the summer, implying that their sources were regulated by independent seasonal factors. Correlation between sea salt concentration and surface wind speed was derived from coastal measurements and showed a high value for the wind speed sensitivity parameter of around 0.37 for our location. In addition, it was revealed that the SOC concentration in aerosols was positively correlated with oxidant photolysis index (Ox × UVB), suggesting that the SOC seasonality was dominated by hydroxyl radical production. ©2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62688
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan; Department of Civil Engineering and Environmental Resources Management, Dahan Institute of Technology, Hualien, Taiwan; Department of Public Health, Chung Shan Medical University, Taichung, Taiwan; Environmental Protection Administration, Taipei, Taiwan; School of Public Health, National Defense Medical Center, Taipei, Taiwan; Graduate Institute of Environmental Engineering, National Central University, Taoyuan, Taiwan
Recommended Citation:
Chou C.C.-K.,Hsu W.-C.,Chang S.-Y.,et al. Seasonality of the mass concentration and chemical composition of aerosols around an urbanized basin in East Asia[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(3)