搜索结果: 1-15 共查到“大气科学 soot”相关记录15条 . 查询时间(0.136 秒)
Soot from heaters and traffic is not just a local problem
aerosol particle soot climate change human health
2021/8/4
Soot particles from oil and wood heating systems as well as road traffic can pollute the air in Europe on a much larger scale than previously assumed. The evaluation of the sources during a measuring ...
Soot may be half the problem when it comes to cookstoves（图）
Soot half problem comes cookstoves
2020/4/26
The telltale signature of a cookstove, commonly used to prepare food or provide heat by burning wood, charcoal, animal dung or crop residue, is the thick, sooty smoke that rises from the flames. Its r...
Arctic snow not darkening due to soot,dust,Dartmouth-led study finds
Arctic snow soot dust Dartmouth-led
2015/11/12
For millennia, Greenland's ice sheet reflected sunlight back into space, but satellite measurements in recent years suggest the bright surface is darkening, causing solar heat to be absorbed and surfa...
Characteristics of Atmospheric Elemental Carbon (Char and Soot) in Ultrafine and Fine Particles in a Roadside Environment, Japan
Black carbon (BC) Ultrafine particles Char-EC Soot-EC Diesel exhausts
2016/3/28
Atmospheric carbonaceous components, particularly char and soot in ultrafine particles (UFPs; Dp < 0.1 m) and fine
particles (FPs; Dp < 2.5 m), were measured four times during one...
Soot microphysical effects on liquid clouds, a multi-model investigation
carbonaceous aerosols liquid clouds a multi-model investigation
2011/2/25
We use global models to explore the microphysical effects of carbonaceous aerosols on liquid clouds. Although absorption of solar radiation by soot warms the atmosphere, soot may cause climate cooling...
Uptake of NO3 and N2O5 to Saharan dust, ambient urban aerosol and soot: a relative rate study
NO3 and N2O5 Saharan dust ambient urban aerosol and soot a relative rate study
2010/8/12
The uptake of NO3 and N2O5 to Saharan dust, ambient aerosols and soot was investigated using a novel and simple relative rate method with simultaneous detection of both NO3 and N2O5. The use of cavity...
Different characteristics of char and soot in the atmosphere and their ratio as an indicator for source identification in Xi'an, China
atmosphere indicator source identification Xi'an China
2010/2/1
Numerous definitions and analytical techniques for elemental (or black) carbon (EC) have been published in the scientific literature, but still no generally accepted interdisciplinary definition exist...
Detailed heterogeneous chemistry in an urban plume box model: reversible co-adsorption of O3, NO2, and H2O on soot coated with benzo[a]pyrene
Detailed heterogeneous chemistry urban plume box model NO2 H2O
2009/10/9
This study assesses in detail the effects of heterogeneous chemistry on the particle surface and gas-phase composition by modeling the reversible co-adsorption of O3, NO2, and H2O on soot coated with ...
Emission of ions and charged soot particles by aircraft engines
Emission of ions charged soot particles aircraft engines
2009/3/10
In this article, a model which examines the formation and evolution of chemiions in an aircraft engine is proposed. This model which includes chemiionisation, electron thermo-emission, electron attach...
Soot aging time scales in polluted regions during day and night
Soot aging time scales polluted regions day and night
2009/3/6
The aging of soot is one of the key uncertainties in the estimation of both the direct and indirect climate effect. While freshly emitted soot is initially hydrophobic and externally mixed, it can be ...
Heterogeneous conversion of NO2 and NO on HNO3 treated soot surfaces: atmospheric implications
NO2 NO HNO3 soot surfaces atmospheric implications
2009/1/23
For the treatment of soot by pure HNO3 only reversible uptake with a surface coverage of ~1-2x1014 HNO3 cm-2 was observed for HNO3 mixing ratios in the range 250-800ppbv. Only for higher HNO3 mixing r...
Processing of soot in an urban environment: case study from the Mexico City Metropolitan Area
Processing of soot urban environment Mexico City Metropolitan Area
2009/1/14
Chemical composition, size, and mixing state of atmospheric particles are critical in determining their effects on the environment. There is growing evidence that soot aerosols play a particularly imp...
Atmospheric number size distributions of soot particles and estimation of emission factors
Atmospheric number size distributions soot particles emission factors
2009/1/5
Number fractions of externally mixed particles of four different sizes (30, 50, 80, and 150 nm in diameter) were measured using a Volatility Tandem DMA. The system was operated in a street canyon (Eis...
Insights into the role of soot aerosols in cirrus cloud formation
soot aerosols cirrus cloud formation
2008/12/17
Cirrus cloud formation is believed to be dominated by homogeneous freezing of supercooled liquid aerosols in many instances. Heterogeneous ice nuclei such as mineral dust, metallic, and soot particles...
Internally mixed soot, sulfates, and organic matter in aerosol particles from Mexico City
sulfates organic matter aerosol particles Mexico City
2008/11/25
Soot particles, which are aggregated carbonaceous spherules with graphitic structures, are major aerosol constituents that result from burning of fossil fuel, biofuel, and biomass. Their properties co...