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DOI | 10.5194/acp-17-14291-2017 |
Real-time detection of airborne fluorescent bioparticles in Antarctica | |
Crawford, Ian1; Gallagher, Martin W.1; Bower, Keith N.1; Choularton, Thomas W.1; Flynn, Michael J.1; Ruske, Simon1; Listowski, Constantino2,6; Brough, Neil2; Lachlan-Cope, Thomas2; Fleming, Zoe L.3; Foot, Virginia E.4; Stanley, Warren R.5 | |
2017-12-01 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:23 |
文章类型 | Article |
语种 | 英语 |
国家 | England; France |
英文摘要 | We demonstrate, for the first time, continuous real-time observations of airborne bio-fluorescent aerosols recorded at the British Antarctic Survey's Halley VI Research Station, located on the Brunt Ice Shelf close to the Weddell Sea coast (lat 75 degrees 34'59 '' S, long 26 degrees 10'0 '' W) during Antarctic summer, 2015. As part of the NERC MAC (Microphysics of Antarctic Clouds) aircraft aerosol cloud interaction project, observations with a real-time ultraviolet-light-induced fluorescence (UV-LIF) spectrometer were conducted to quantify airborne biological containing particle concentrations along with dust particles as a function of wind speed and direction over a 3-week period. Significant, intermittent enhancements of both non- and bio-fluorescent particles were observed to varying degrees in very specific wind directions and during strong wind events. Analysis of the particle UV-induced emission spectra, particle sizes and shapes recorded during these events suggest the majority of particles were likely a subset of dust with weak fluorescence emission responses. A minor fraction, however, were likely primary biological particles that were very strongly fluorescent, with a subset identified as likely being pollen based on comparison with laboratory data obtained using the same instrument. A strong correlation of bio-fluorescent particles with wind speed was observed in some, but not all, periods. Interestingly, the fraction of fluorescent particles to total particle concentration also increased significantly with wind speed during these events. The enhancement in concentrations of these particles could be interpreted as due to resuspension from the local ice surface but more likely due to emissions from distal sources within Antarctica as well as intercontinental transport. Likely distal sources identified by back trajectory analyses and dispersion modelling were the coastal ice margin zones in Halley Bay consisting of bird colonies with likely associated high bacterial activity together with contributions from exposed ice margin bacterial colonies but also long-range transport from the southern coasts of Argentina and Chile. Dispersion modelling also demonstrated emissions from shipping lanes, and therefore marine anthropogenic sources cannot be ruled out. Average total concentrations of total fluorescent aerosols were found to be 1.9 +/- 2.6 L-1 over a 3-week period crossing over from November into December, but peak concentrations during intermittent enhancement events could be up to several tens per litre. While this short pilot study is not intended to be generally representative of Antarctic aerosol, it demonstrates the usefulness of the UV-LIF measurement technique for quantification of airborne bioaerosol concentrations and to understand their dispersion. The potential importance for microbial colonisation of Antarctica is highlighted. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416844800004 |
WOS关键词 | PRIMARY BIOLOGICAL AEROSOL ; CLUSTER-ANALYSIS ; BOUNDARY-LAYER ; BLACK CARBON ; WEDDELL SEA ; ICE NUCLEI ; BIOAEROSOL ; PARTICLE ; MARINE ; ATMOSPHERE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/23915 |
专题 | 地球科学 |
作者单位 | 1.Univ Manchester, SEES, Ctr Atmospher Sci, Manchester, Lancs, England; 2.NERC, British Antarctic Survey, Madingley Rd, Cambridge, England; 3.Univ Leicester, Dept Chem, Leicester, Leics, England; 4.Def Sci & Technol Lab, Salisbury, Wilts, England; 5.Univ Hertfordshire, Sci & Technol Res Inst, Hatfield, Herts, England; 6.Univ Paris 06, UPMC, UVSQ Univ Paris Saclay, LATMOS IPSL,CNRS, Guyancourt, France |
推荐引用方式 GB/T 7714 | Crawford, Ian,Gallagher, Martin W.,Bower, Keith N.,et al. Real-time detection of airborne fluorescent bioparticles in Antarctica[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(23). |
APA | Crawford, Ian.,Gallagher, Martin W..,Bower, Keith N..,Choularton, Thomas W..,Flynn, Michael J..,...&Stanley, Warren R..(2017).Real-time detection of airborne fluorescent bioparticles in Antarctica.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(23). |
MLA | Crawford, Ian,et al."Real-time detection of airborne fluorescent bioparticles in Antarctica".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.23(2017). |
条目包含的文件 | 条目无相关文件。 |
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