| DOI: | 10.1016/j.atmosenv.2017.09.013
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| Scopus记录号: | 2-s2.0-85029527035
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| 论文题名: | OH reactivity of the urban air in Helsinki, Finland, during winter |
| 作者: | Praplan A; P; , Pfannerstill E; Y; , Williams J; , Hellén H
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| 刊名: | Atmospheric Environment
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| ISSN: | 0168-2563
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| EISSN: | 1573-515X
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| 出版年: | 2017
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| 卷: | 169 | | 起始页码: | 150
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| 结束页码: | 161
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| 语种: | 英语
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| 英文关键词: | Finland
; Helsinki
; Hydroxyl radical (OH) reactivity
; urban
; Volatile Organic Compounds (VOCs)
; Winter
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| Scopus关键词: | Carbon
; Carbon monoxide
; Chromatography
; Containers
; Gas chromatography
; Liquid chromatography
; Nitrogen oxides
; Sulfur dioxide
; Volatile organic compounds
; Finland
; Helsinki
; Hydroxyl radicals
; urban
; Winter
; Gas adsorption
; carbon monoxide
; hydroxyl radical
; nitrogen dioxide
; nitrogen oxide
; ozone
; pyrrole
; sulfur dioxide
; ambient air
; carbon monoxide
; hydroxyl radical
; instrumentation
; nitrogen oxides
; ozone
; sulfur dioxide
; traffic emission
; urban atmosphere
; volatile organic compound
; winter
; accuracy
; air analysis
; air sampling
; ambient air
; Article
; boundary layer
; calibration
; circadian rhythm
; dilution
; environmental temperature
; exhaust gas
; gas chromatograph
; humidity
; limit of detection
; liquid chromatography
; measurement precision
; photolysis
; priority journal
; surface property
; temperature sensitivity
; urban area
; winter
; Finland
; Finland
; Helsinki
; Varsinais-Suomi
|
| Scopus学科分类: | Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
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| 英文摘要: | A new instrument to measure total OH reactivity in ambient air based on the Comparative Reactivity Method (CRM) has been built and characterized at the Finnish Meteorological Institute in Helsinki, Finland. The system is based on the detection of pyrrole by a gas chromatograph with a photoionization detector and designed for long term studies. It was tested in a container close to the SMEAR III semi-urban station in Helsinki during the winter in February 2016. The sampling location next to the delivery area of the institute was influenced by local vehicle emissions and cannot be considered representative of background conditions in Helsinki. However, effects of nitrogen oxides on the measurements could be investigated there. During this campaign, 56 compounds were measured individually by 1) an in-situ gas chromatograph coupled to a mass spectrometer (GC/MS) and by 2) off-line sampling in canisters and on adsorbent filled cartridges taken at the container and subsequently analysed by GC-FID and liquid chromatography, respectively. In addition, nitrogen oxides were measured at the same location, while ozone, carbon monoxide and sulfur dioxide concentrations have been retrieved from the SMEAR III mast data. The comparison between the total OH reactivity measured and the OH reactivity derived from individual compound measurements are in better agreement for lower reactivity levels. Possible explanations for the differences are discussed in detail. © 2017 The Authors |
| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/82735
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Finnish Meteorological Institute, P.O. Box 503, Helsinki, Finland; Max Planck Institute for Chemistry, Mainz, Germany
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| Recommended Citation: | |
Praplan A,P,, Pfannerstill E,et al. OH reactivity of the urban air in Helsinki, Finland, during winter[J]. Atmospheric Environment,2017-01-01,169
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