搜索结果: 1-15 共查到“大气化学 particle formation”相关记录19条 . 查询时间(0.162 秒)
First long-term study of particle number size distributions and new particle formation events of regional aerosol in the North China Plain
particle number size new particle formation regional aerosol the North China Plain
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2011/2/25
Atmospheric particle number size distributions (size range 0.003–10 μm) were measured between March 2008 and August 2009 at Shangdianzi (SDZ), a rural research station in the North China Plain. These ...
New particle formation and ultrafine charged aerosol climatology at a high altitude site in the Alps (Jungfraujoch, 3580 m a.s.l., Switzerland)
New particle formation ultrafine charged aerosol climatology a high altitude site the Alps
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2010/10/11
We investigate the formation and growth of charged aerosols clusters at Jungfraujoch, in the Swiss Alps (3580 m a.s.l.), the highest altitude site of the European EUCAARI project intensive campaign. C...
An improved criterion for new particle formation in diverse atmospheric environments
new particle formation diverse atmospheric environments
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2010/9/21
A dimensionless theory for new particle formation (NPF) was developed, using an aerosol population balance model incorporating recent developments in nucleation rates and measured particle growth rate...
Particle formation and growth at five rural and urban sites
Particle formation and growth five rural and urban sites
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2010/9/1
Ultrafine particle (UFP) number and size distributions were simultaneously measured at five urban and rural sites during the summer of 2007 in Ontario, Canada as part of the Border Air Quality and Met...
Laboratory study on new particle formation from the reaction OH + SO2: influence of experimental conditions, H2O vapour, NH3 and the amine tert-butylamine on the overall process
Laboratory study new particle formation the reaction OH + SO2 H2O vapour NH3 the amine tert-butylamine the overall process
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2010/8/16
Nucleation experiments starting from the reaction of OH radicals with SO2 have been performed in the IfT-LFT flow tube under atmospheric conditions at 293±0.5 K for a relative humidity of 13–61%. The ...
The roles of sulfuric acid in new particle formation and growth in the mega-city of Beijing
sulfuric acid new particle formation and growth the mega-city of Beijing
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2010/8/13
Simultaneous measurements of gaseous sulfuric acid and particle number size distributions were performed to investigate aerosol nucleation and growth during CAREBeijing-2008. The analysis of the measu...
Explaining global surface aerosol number concentrations in terms of primary emissions and particle formation
global surface aerosol number primary emissions particle formation
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2010/8/13
We synthesised observations of total particle number (CN) concentration from 36 sites around the world. We found that annual mean CN concentrations are typically 300–2000 cm−3 in the marine boun...
Hygroscopicity and chemical composition of Antarctic sub-micrometre aerosol particles and observations of new particle formation
Hygroscopicity and chemical composition Antarctic sub-micrometre aerosol particles new particle formation
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2010/8/12
The Antarctic near-coastal sub-micrometre aerosol particle features in summer were characterised based on measured data on aerosol hygroscopicity, size distributions, volatility and chemical ion and o...
Atmospheric data over a solar cycle: no connection between galactic cosmic rays and new particle formation
solar cycle galactic cosmic rays particle formation
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2010/2/21
Aerosol particles affect the Earth's radiative balance by directly scattering and absorbing solar radiation and, indirectly, through their activation into cloud droplets. Both effects are known with c...
Effects of boundary layer particle formation on cloud droplet number and changes in cloud albedo from 1850 to 2000
boundary layer particle formation cloud droplet number cloud albedo
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2010/2/1
We use a global aerosol microphysics model to estimate the effect of particle formation through activation nucleation in the boundary layer (BL) on cloud droplet number concentration (CDNC) on global ...
A new parametrization for ambient particle formation over coniferous forests and its potential implications for the future
ambient particle formation coniferous forests potential implications future
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2009/11/9
Atmospheric new particle formation is a general phenomenon observed over coniferous forests. So far nucleation is either parameterised as a function of gaseous sulphuric acid concentration only, which...
Time span and spatial scale of regional new particle formation events over Finland and Southern Sweden
regional new particle formation events Finland Southern Sweden
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2009/7/23
We investigated the time span and spatial scale of regional new particle formation (NPF) events in Finland and Southern Sweden using measured particle number size distributions at five background stat...
New-particle formation events in a continental boundary layer: first results from the SATURN experiment
New-particle formation events continental boundary layer SATURN experiment
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2009/3/11
During the SATURN experiment, which took place from 27 May to 14 June 2002, new particle formation in the continental boundary layer was investigated. Simultaneous ground-based and tethered-balloon-bo...
Kinetic nucleation and ions in boreal forest particle formation events
Kinetic nucleation ions boreal forest particle
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2009/3/10
In order to gain a more comprehensive picture on different mechanisms behind atmospheric particle formation, measurement results from QUEST 2-campaign are analyzed with an aid of an aerosol dynamic mo...
Direct measurement of particle formation and growth from the oxidation of biogenic emissions
Direct measurement of particle formation oxidation of biogenic emissions
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2009/1/15
A new facility has been developed to investigate the formation of new particles from the oxidation of volatile organic compounds emitted from vegetation. The facility consists of a biogenic emissions...