DOI: 10.1016/j.atmosenv.2015.08.057
Scopus记录号: 2-s2.0-84941274466
论文题名: Variation and co-variation of PM10, particle number concentration, NOx and NO2 in the urban air - Relationships with wind speed, vertical temperature gradient and weather type
作者: Grundström M ; , Hak C ; , Chen D ; , Hallquist M ; , Pleijel H
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 120 起始页码: 317
结束页码: 327
语种: 英语
英文关键词: Atmospheric stability
; Lamb weather types
; NO2
; NOx
; PM10
; PNC
; Proxy
; Urban air pollution
; Wind
Scopus关键词: Air pollution
; Atmospheric temperature
; Balloons
; Pollution
; Speed
; Temperature
; Thermal gradients
; Urban planning
; Wind
; Atmospheric stability
; Lamb weather types
; NOx
; PM10
; PNC
; Proxy
; Urban air pollution
; Urban growth
; nitric oxide
; nitrogen dioxide
; atmospheric particle
; atmospheric pollution
; concentration (composition)
; particulate matter
; temperature gradient
; traffic emission
; urban atmosphere
; weather
; wind velocity
; air pollutant
; air quality
; Article
; environmental temperature
; hypothesis
; meteorology
; particle size
; particulate matter
; priority journal
; risk assessment
; seasonal variation
; Sweden
; urban area
; velocity
; weather
; wind
; wind speed
; Goteborg
; Sweden
; Vastra Gotaland
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: Atmospheric ultrafine particles (UFP; diameter < 0.1 μm) represent a growing global health concern in urban environments and has a strong link to traffic related emissions. UFP is usually the dominating fraction of atmospheric particle number concentrations (PNC) despite being a minor part of total particle mass. The aim of this study was to empirically investigate the relationship between PNC and other air pollutants (NOX, NO2 and PM10) in the urban environment and their dependence on meteorology and weather type, using the Lamb Weather Type (LWT) classification scheme. The study was carried out in Gothenburg, Sweden, at an urban background site during April 2007-May 2008. It was found that daily average [PNC] correlated very well with [NOx] (R2 = 0.73) during inversion days, to a lesser extent with [NO2] (R2 = 0.58) and poorly with [PM10] (R2 = 0.07). Both PNC and NOx had similar response patterns to wind speed and to the strength of temperature inversions. PNC displayed two regimes, one strongly correlated to NOx and a second poorly correlated to NOx which was characterised by high wind speed. For concentration averages based on LWTs, the PNC-[NOx] relationship remained strong (R2 = 0.70) where the windy LWT W deviated noticeably. Exclusion of observations with wind speed >5 ms-1 or ΔT < 0 °C from LWTs produced more uniform and stronger relationships (R2 = 0.90; R2 = 0.93). Low wind speeds and positive vertical temperature gradients were most common during LWTs A, NW, N and NE. These weather types were also associated with the highest daily means of NOx (~30 ppb) and PNC (~10 000 # cm-3). A conclusion from this study is that NOx (but not PM10) is a good proxy for PNC especially during calm and stable conditions and that LWTs A, NW, N and NE are high risk weather types for elevated NOx and PNC. © 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81486
Appears in Collections: 气候变化事实与影响
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作者单位: University of Gothenburg, Department of Biological and Environmental Sciences, P.O. Box 461, Gothenburg, Sweden; NILU - Norwegian Institute for Air Research, Urban Environment and Industry Department, P.O. Box 100, Kjeller, Norway; University of Gothenburg, Department of Earth Science, P.O. Box 460, Gothenburg, Sweden; University of Gothenburg, Department of Chemistry and Molecular Biology, Gothenburg, Sweden
Recommended Citation:
Grundström M,, Hak C,, Chen D,et al. Variation and co-variation of PM10, particle number concentration, NOx and NO2 in the urban air - Relationships with wind speed, vertical temperature gradient and weather type[J]. Atmospheric Environment,2015-01-01,120