DOI: 10.1016/j.atmosenv.2014.11.015
Scopus记录号: 2-s2.0-84912019566
论文题名: Frequent nucleation events at the high altitude station of Chacaltaya (5240m a.s.l.), Bolivia
作者: Rose C ; , Sellegri K ; , Velarde F ; , Moreno I ; , Ramonet M ; , Weinhold K ; , Krejci R ; , Andrade M ; , Wiedensohler A ; , Laj P
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 102 起始页码: 18
结束页码: 29
语种: 英语
英文关键词: Aerosols
; High altitude
; Nucleation
Scopus关键词: Aerosols
; Atmospheric composition
; Boundary layers
; Drought
; Troposphere
; Upper atmosphere
; Volatile organic compounds
; Biogenic volatile organic compounds
; High altitude
; Ion-induced nucleation
; New particle formation
; Nucleation and growth
; Particle growth rates
; Particle number concentration
; Southern Hemisphere
; Nucleation
; volatile organic compound
; aerosol formation
; altitude
; concentration (composition)
; nucleation
; rainforest
; temporal analysis
; troposphere
; volatile organic compound
; altitude
; Article
; boundary layer
; cloud
; coastal waters
; growth rate
; moisture
; particle size
; photochemistry
; rain forest
; seasonal variation
; troposphere
; Amazon River
; Bolivia
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: While nucleation may represent one of the major processes responsible for the total aerosol number burden in the atmosphere, and especially at high altitude, new particle formation (NPF) events occurring in the upper part of the troposphere are poorly documented in the literature, particularly in the southern hemisphere. NPF events were detected and analyzed at the highest measurement site in the world, Chacaltaya (5240m a.s.l.), Bolivia between January 1 and December 31 2012, using a Neutral Aerosol and Ion Spectrometer (NAIS) that detects clusters down to 0.4nm. NPF frequency at Chacaltaya is one of the highest reported so far (63.9%) and shows a clear seasonal dependency with maximum up to 100% during the dry season. This high seasonality of the NPF events frequency was found to be likely linked to the presence of clouds in the vicinity of the station during the wet season. Multiple NPF events are seen on almost 50% of event days and can reach up to 6 events per day, increasing the potential of nucleation to be the major contributor to the particle number concentrations in the upper troposphere. Ion-induced nucleation (IIN) was 14.8% on average, which is higher than the IIN fractions reported for boundary layer stations. The median formation rate of 2nm particles computed for first position events is increased during the dry season (1.90cm-3s-1) compared to the wet season (1.02cm-3s-1), showing that events are more intense, on top of being more frequent during the dry season. On the contrary, particle growth rates (GRs) are on average enhanced during the wet season, which could be explained by higher amount of biogenic volatile organic compounds transported from the Amazon rainforest. The NPF events frequency is clearly enhanced when air masses originate from the oceanic sector, with a frequency of occurrence close to 1. However, based on the particle GRs, we calculate that particles most likely nucleate after the oceanic air masses reach the land and are presumably not originating from the marine free troposphere. The high frequency of NPF events, the occurrence of multiple events per day, and the relatively high formation rates observed at Chacaltaya imply that nucleation and growth are likely to be the major mechanism feeding the upper atmosphere with aerosol particles in this part of the continent. © 2014 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82018
Appears in Collections: 气候变化事实与影响
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作者单位: Laboratoire de Météorologie Physique CNRS UMR 6016, Observatoire de Physique du Globe de Clermont-Ferrand, Université Blaise Pascal, 24 avenue des Landais, Aubière, France; University of Mayor de San Andres, UMSA-LAP, Laboratory of Atmospheric Physics, Campus Cota Cota calle 27, Endifico FCPN piso 3, La Paz, Bolivia; Laboratoire des Sciences du Climat et de l'Environnement, UMR Commissariat à l'Energie Atomique/CNRS 1592, Gif-sur-Yvette, France; Leibniz Institute for Tropospheric Research, Permoserstr. 15, Leipzig, Germany; Department of Applied Environmental Science (ITM), Atmospheric Science Unit, Stockholm University, Stockholm, Sweden; Laboratoire de Glaciologie et Géophysique de l'Environnement, CNRS UMR 5183, Université Joseph Fourier Grenoble 1, Saint Martin d'Héres, France
Recommended Citation:
Rose C,, Sellegri K,, Velarde F,et al. Frequent nucleation events at the high altitude station of Chacaltaya (5240m a.s.l.), Bolivia[J]. Atmospheric Environment,2015-01-01,102