DOI: 10.1016/j.atmosenv.2015.05.038
Scopus记录号: 2-s2.0-84930651177
论文题名: Hydroxy fatty acids in marine aerosols as microbial tracers: 4-year study on β- and ω-hydroxy fatty acids from remote Chichijima Island in the western North Pacific
作者: Tyagi P ; , Ishimura Y ; , Kawamura K
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 115 起始页码: 89
结束页码: 100
语种: 英语
英文关键词: East-Asian outflow
; Gram-negative bacteria
; Marine aerosols
; North Pacific
; Terrestrial biomarkers
; β- and ω-hydroxy fatty acids
Scopus关键词: Aerosols
; Atmospheric aerosols
; Atmospheric movements
; Bacteria
; Cluster analysis
; Lipids
; East-Asian outflow
; Gram-negative bacteria
; Hydroxy fatty acids
; Marine aerosols
; North Pacific
; Terrestrial biomarkers
; Fatty acids
; beta hydroxy fatty acid
; hydroxy fatty acid
; omega beta hydroxy fatty acid
; unclassified drug
; aerosol
; atmospheric pollution
; atmospheric transport
; bacterium
; biomarker
; fatty acid
; marine environment
; microbial community
; outflow
; seasonal variation
; tracer
; aerosol
; Article
; Asia
; atmospheric transport
; autumn
; cluster analysis
; concentration (parameters)
; Gram negative bacterium
; nonhuman
; pollution
; priority journal
; seasonal variation
; spring
; summer
; vascular plant
; winter
; Bonin Islands
; Chichijima
; Honshu
; Japan
; Kanto
; Pacific Ocean
; Pacific Ocean (Northwest)
; Tokyo [Kanto]
; Bacteria (microorganisms)
; Embryophyta
; Negibacteria
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: To better understand the long-range atmospheric transport of microbial aerosols from Asia to the western North Pacific, marine aerosols were collected from Chichijima Island (27°04'N; 142°13'E) on a biweekly basis during 1990-1993. These samples were investigated for β- and ω-hydroxy fatty acids (FAs) as terrestrial biomarkers of Gram-negative bacteria (GNB) and higher plants, respectively. The average concentrations of β-hydroxy (C8 -C31 ) and ω-hydroxy (C11 -C28 ) FAs show pronounced seasonal variability with maxima in spring (300±70pgm-3) and winter (650±330pgm-3), respectively. Airmass back trajectories clearly indicate the continental outflow from Asia during winter to spring, whereas maritime airmasses dominate in summer to autumn over Chichijima. It is noteworthy that atmospheric abundances of β-hydroxy FAs and, thus, the estimated mass concentration of GNB have not been significantly varied between polluted (continental) and pristine (oceanic) airmasses during the study period. However, the relative source strength observed from cluster analysis of β-hydroxy FAs in the polluted continental airmassess vary significantly among seasons (winter: 98%, spring: 63%, summer; 11%, autumn: 26%). In addition, there were distinguishable differences between polluted continental and pristine maritime airmasses with regard to C-number predominance. The even C-number predominance of β- and ω-hydroxy FAs (~80 and 98% of total mass concentration, respectively) in marine aerosols could be due to their significant contribution from GNB, terrestrial plants and soil microorganisms. These results have implications towards assessing the atmospheric transport of bacterial and plant lipids in the continental outflow over the open ocean. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81679
Appears in Collections: 气候变化事实与影响
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作者单位: Graduate School of Environmental Sciences, Hokkaido University, Japan; Institute of Low Temperature Science, Hokkaido University, Japan
Recommended Citation:
Tyagi P,, Ishimura Y,, Kawamura K. Hydroxy fatty acids in marine aerosols as microbial tracers: 4-year study on β- and ω-hydroxy fatty acids from remote Chichijima Island in the western North Pacific[J]. Atmospheric Environment,2015-01-01,115