搜索结果: 1-15 共查到“大气化学 Laboratory”相关记录19条 . 查询时间(0.122 秒)
Laboratory investigations of the impact of mineral dust aerosol on cold cloud formation
mineral dust aerosol cold cloud formation Laboratory
2010/12/28
Dust particles represent a dominant source of particulate matter (by mass) to the atmosphere, and their emission from some source regions has been shown to be transported on regional and hemispherical...
Laboratory measurements of trace gas emissions from biomass burning of fuel types from the southeastern and southwestern United States
Laboratory measurements trace gas fuel types the southeastern and southwestern United States
2010/11/30
Vegetation commonly managed by prescribed burning was collected from five southeastern and southwestern US military bases and burned under controlled conditions at the US Forest Service Fire Sciences ...
Laboratory simulation for the aqueous OH-oxidation of methyl vinyl ketone and methacrolein: significance to the in-cloud SOA production
Laboratory simulation the aqueous OH-oxidation methyl vinyl ketone the in-cloud SOA production
2010/10/11
Increasing evidence suggests that secondary organic aerosol (SOA) is formed through aqueous phase reactions in atmospheric clouds. In the present study, the aqueous oxidation of methyl vinyl ketone (M...
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
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 ...
Biogenic oxidized organic functional groups in aerosol particles from a mountain forest site and their similarities to laboratory chamber products
Biogenic oxidized organic functional groups aerosol particles a mountain forest site laboratory chamber products
2010/8/13
Submicron particles collected at Whistler, British Columbia, at 1020 m a.s.l. during May and June 2008 on Teflon filters were analyzed by Fourier transform infrared (FTIR) and X-ray fluorescence (XRF)...
Sample drying to improve HCHO measurements by PTR-MS instruments: laboratory and field measurements
HCHO PTR-MS laboratory and field measurements
2010/2/21
A significant improvement in the PTR-MS instrument sensitivity to formaldehyde was obtained by drying the air sample to a dew point of −30 °C using a cold trap to condense and freeze water vapou...
A laboratory based experimental study of mercury emission from contaminated soils in the River Idrijca catchment
mercury emission soils River Idrijca catchment
2010/2/21
Results obtained by a laboratory flux measurement system (LFMS) focused on investigating the kinetics of the mercury emission flux (MEF) from contaminated soils of the Idrija Hg-mine region, Slovenia ...
High levels of reactive gaseous mercury observed at a high elevation research laboratory in the Rocky Mountains
reactive gaseous mercury high elevation research laboratory Rocky Mountains
2009/11/9
The chemical cycling and spatiotemporal distribution of mercury in the troposphere is poorly understood. We measured gaseous elemental mercury (GEM), reactive gaseous mercury (RGM) and particulate mer...
Laboratory investigation of photochemical oxidation of organic aerosol from wood fires 2: analysis of aerosol mass spectrometer data
Laboratory investigation photochemical oxidation organic aerosol aerosol mass spectrometer
2009/3/31
Experiments were conducted to investigate the effects of photo-oxidation on organic aerosol (OA) in dilute wood smoke by exposing emissions from soft- and hard-wood fires to UV light in a smog chamber...
Laboratory study on heterogeneous decomposition of methyl chloroform on various standard aluminosilica clay minerals as a potential tropospheric sink
heterogeneous decomposition methyl chloroform aluminosilica clay minerals potential tropospheric sink
2009/3/11
Methyl chloroform (1,1,1-trichloroethane, CH3CCl3) was found to decompose heterogeneously on seven types of standard clay minerals (23 materials) in dry air at 313 K in the laboratory. All reactions p...
Organic acids as cloud condensation nuclei：Laboratory studies of highly soluble and insoluble species
Organic acids cloud condensation nuclei soluble and insoluble species
2009/3/10
The ability of sub-micron-sized organic acid particles to act as cloud condensation nuclei (CCN) has been examined at room temperature using a newly constructed continuous-flow, thermal-gradient diffu...
Alpha-pinene oxidation by OH: simulations of laboratory experiments
Alpha-pinene oxidation OH laboratory experiments
2009/3/10
This paper presents a state-of-the-art gas-phase mechanism for the degradation of α-pinene by OH and its validation by box model simulations of laboratory measurements. It is based on the near-explici...
Laboratory evidence for volume-dominated nucleation of ice in supercooled water microdroplets
Laboratory evidence volume-dominated nucleation of ice supercooled water microdroplets
2009/3/6
We report on measurements of the rate of homogeneous ice nucleation in supercooled water microdroplets levitated in an electrodynamic balance. By comparison of the freezing probability for droplets of...
Heterogeneous freezing of single sulfuric acid solution droplets: laboratory experiments utilizing an acoustic levitator
Heterogeneous freezing single sulfuric acid solution droplets laboratory experiments acoustic levitator
2009/3/6
The heterogeneous freezing temperatures of single binary sulfuric acid solution droplets were measured in dependency of acid concentration down to temperatures as low as -50°C. In order to avoid influ...
Laboratory studies of the homogeneous nucleation of iodine oxides
Laboratory homogeneous nucleation iodine oxides
2009/2/20
Laboratory experimental results of iodine oxide nucleation are presented. Nucleation was induced following UV photolysis of CF3I or CH2I2 in the presence of excess ozone. Measurements were performed i...