搜索结果: 1-15 共查到“大气科学 organic aerosols”相关记录17条 . 查询时间(0.098 秒)
Mass yields of secondary organic aerosols from the oxidation of α-pinene and real plant emissions
secondary organic aerosols α-pinene plant emissions
2011/2/25
Biogenic volatile organic compounds (VOCs) are a significant source of global secondary organic aerosol (SOA); however, quantifying their aerosol forming potential remains a challenge. This study pres...
The chemical and microphysical properties of secondary organic aerosols from Holm Oak emissions
The chemical and microphysical properties secondary organic aerosols Holm Oak emissions
2010/8/16
The Mediterranean region is expected to experience substantial climatic change in the next 50 years. But, possible effects of climate change on biogenic volatile organic compound (VOC) emissions as we...
Functional group composition of ambient and source organic aerosols determined by tandem mass spectrometry
Functional group composition ambient and source organic aerosols tandem mass spectrometry
2010/8/16
The functional group composition of various organic aerosols (OA) is investigated using a recently developed analytical approach based on atmospheric pressure chemical ionisation-tandem mass spectrome...
Towards closing the gap between hygroscopic growth and CCN activation for secondary organic aerosols – Part 3: Influence of the chemical composition on the hygroscopic properties and volatile fractions of aerosols
hygroscopic growth CCN activation secondary organic aerosols the chemical composition the hygroscopic properties aerosols
2010/8/12
The influence of varying levels of water mixing ratio, r, during the formation of secondary organic aerosol (SOA) from the ozonolysis of α-pinene on the SOA hygroscopicity and volatility was investiga...
Aerosol analysis using a Thermal-Desorption Proton-Transfer-Reaction Mass Spectrometer (TD-PTR-MS):a new approach to study processing of organic aerosols
Aerosol analysis Thermal-Desorption Proton-Transfer-Reaction Mass Spectrometer organic aerosols
2010/3/5
We present a novel analytical approach to measure the chemical composition of organic aerosol. The new instrument combines proton-transfer-reaction mass-spectrometry (PTR-MS) with a collection-thermal...
Contributions from transport, solid fuel burning and cooking to primary organic aerosols in two UK cities
solid fuel burning primary organic aerosols UK cities
2010/2/1
Organic matter frequently represents the single largest fraction of fine particulates in urban environments and yet the exact contributions from different sources and processes remain uncertain, owing...
Source apportionment of fine organic aerosols in Beijing
Source apportionment fine organic aerosols Beijing
2009/11/19
Fine particles (PM2.5, i.e., particles with an aerodynamic diameter of ≤2.5 μm) were collected from the air in August 2005, August–September 2006, and January–February 2007, in Beijing, China. The che...
Modeling organic aerosols during MILAGRO: importance of biogenic secondary organic aerosols
Modeling organic aerosols MILAGRO biogenic secondary organic aerosols
2009/9/23
The meso-scale chemistry-transport model CHIMERE is used to assess our understanding of major sources and formation processes leading to a fairly large amount of organic aerosols – OA, including prima...
Evaluating simulated primary anthropogenic and biomass burning organic aerosols during MILAGRO: implications for assessing treatments of secondary organic aerosols
primary anthropogenic biomass organic aerosols MILAGRO secondary organic aerosols
2009/9/2
Simulated primary organic aerosols (POA), as well as other particulates and trace gases, in the vicinity of Mexico City are evaluated using measurements collected during the 2006 Megacity Initiative: ...
Temperature dependence of yields of secondary organic aerosols from the ozonolysis of α-pinene and limonene
secondary organic aerosols α-pinene limonene
2009/3/13
Secondary organic aerosol (SOA) formation has been investigated as a function of temperature and humidity for the ozone-initiated reaction of the two monoterpenes α-pinene (243–313 K) and limonene (25...
Hydrocarbon-like and oxygenated organic aerosols in Pittsburgh: insights into sources and processes of organic aerosols
Hydrocarbon-like oxygenated organic aerosols Pittsburgh organic aerosols
2009/2/19
A recently developed algorithm (Zhang et al., 2005) has been applied to deconvolve the mass spectra of organic aerosols acquired with the Aerosol Mass Spectrometer (AMS) in Pittsburgh during September...
The role of organic aerosols in homogeneous ice formation
organic aerosols homogeneous ice formation
2009/2/7
Recent field observations suggest that the fraction of organic-containing aerosol particles in ice cloud particles is diminished when compared to the background aerosol prior to freezing. In this work...
A mass spectrometric study of secondary organic aerosols formed from the photooxidation of anthropogenic and biogenic precursors in a reaction chamber
mass spectrometric study secondary organic aerosols photooxidation of anthropogenic biogenic precursors reaction chamber
2009/1/20
An Aerodyne Aerosol Mass Spectrometer (AMS) has been utilised to provide on-line measurements of the mass spectral signatures and mass size distributions of the oxidation products resulting from irrad...
Hygroscopicity of secondary organic aerosols formed by oxidation of cycloalkenes, monoterpenes, sesquiterpenes, and related compounds
Hygroscopicity of secondary organic aerosols oxidation of cycloalkenes monoterpenes sesquiterpenes related compounds
2009/1/12
A series of experiments has been conducted in the Caltech indoor smog chamber facility to investigate the water uptake properties of aerosol formed by oxidation of various organic precursors. Secondar...
Critical assessment of the current state of scientific knowledge, terminology, and research needs concerning the role of organic aerosols in the atmosphere, climate, and global change
current state of scientific knowledge role of organic aerosols global change
2009/1/8
In spite of impressive advances in recent years, our present understanding of organic aerosol (OA) composition, physical and chemical properties, sources and transformation characteristics is still ra...