搜索结果: 76-90 共查到“大气化学 Aerosol”相关记录311条 . 查询时间(0.067 秒)
Molecular characterization of urban organic aerosol in tropical India: contributions of primary emissions and secondary photooxidation
Molecular characterization urban organic aerosol tropical India primary emissions secondary photooxidation
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2010/8/12
Organic molecular composition of PM10 samples, collected at Chennai in tropical India, was studied using capillary gas chromatography/mass spectrometry. Fourteen organic compound classes were detected...
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
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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...
Organic nitrogen in PM2.5 aerosol at a forest site in the Southeast US
Organic nitrogen PM2.5 aerosol forest site Southeast US
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2010/3/5
There is growing evidence that organo-nitrogen compounds may constitute a significant fraction of the aerosol nitrogen (N) budget. However, very little is known about the abundance and origin of this ...
An aerosol chamber investigation of the heterogeneous ice nucleating potential of refractory nanoparticles
aerosol chamber heterogeneous ice nucleating potential refractory nanoparticles
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2010/2/21
All samples were observed to initiate ice formation via the deposition mode at threshold ice super-saturations (RHithresh) ranging from 105% to 140% for temperatures below 220 K. Approximately 10% of ...
A review of natural aerosol interactions and feedbacks within the Earth system
natural aerosol interactions Earth system
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2010/2/21
The natural environment is a major source of atmospheric aerosols, including dust, secondary organic material from terrestrial biogenic emissions, carbonaceous particles from wildfires, and sulphate f...
Recent increase in aerosol loading over the Australian arid zone
aerosol Australian arid zone
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2010/2/21
Collocated sun photometer and nephelometer measurements at Tinga Tingana in the Australian Outback over the decade 1997–2007 show a significant increase in aerosol loading following the onset of sever...
Aerosol distribution around Svalbard during intense easterly winds
Aerosol distribution Svalbard intense easterly winds
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2010/2/21
This paper reports on backscatter and depolarization measurements by an airborne lidar in the Arctic during the ASTAR 2004 campaign. A unique weather situation facilitated the observation of the aeros...
Aerosol hygroscopicity at high (99 to 100%) relative humidities
Aerosol hygroscopicity relative humidities
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2010/2/21
The hygroscopicity of an aerosol strongly influences its effects on climate and, for smaller particles, atmospheric lifetime. While many aerosol hygroscopicity measurements have been made at lower rel...
Absorption Angstrom Exponent in AERONET and related data as an indicator of aerosol composition
AERONET indicator aerosol composition
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2010/2/21
Recent results from diverse air, ground, and laboratory studies using both radiometric and in situ techniques show that the fractions of black carbon, organic matter, and mineral dust in atmospheric a...
Cluster analysis of the impact of air back-trajectories on aerosol optical properties at Hornsund, Spitsbergen
air back-trajectories aerosol optical properties Hornsund Spitsbergen
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2010/2/1
In this paper, spectra of aerosol optical thickness from the AERONET (AErosol RObotic NETwork) station at Hornsund in the southern part of Spitsbergen were employed to study the impact of air mass his...
Microscopic characterization of carbonaceous aerosol particle aging in the outflow from Mexico City
carbonaceous aerosol particle outflow Mexico City
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2010/2/21
This study was part of the Megacities Initiative: Local and Global Research Observations (MILAGRO) field campaign conducted in Mexico City metropolitan area during spring 2006. The physical and chemic...
Size-resolved aerosol water-soluble ionic compositions in the summer of Beijing: implication of regional secondary formation
aerosol water-soluble ionic compositions regional secondary formation
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2010/2/21
To characterize aerosol pollution in Beijing, size-resolved aerosols were collected by MOUDIs during CAREBEIJING-2006 field campaign at Peking University (urban site) and Yufa (upwind rural site). Fin...
The critical assessment of vapour pressure estimation methods for use in modelling the formation of atmospheric organic aerosol
vapour pressure estimation methods atmospheric organic aerosol critical assessment
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2010/2/1
A selection of models for estimating vapour pressures have been tested against experimental data for a set of compounds selected for their particular relevance to the formation of atmospheric aerosol ...
Secondary organic aerosol production from modern diesel engine emissions
Secondary organic aerosol production modern diesel engine emissions
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2010/2/1
Secondary organic aerosol (SOA) production was observed at significant levels in a series of modern diesel exhaust (DE) aging experiments conducted at the European Outdoor Photoreactor/Simulation Cham...
Data assimilation of CALIPSO aerosol observations
Data assimilation CALIPSO aerosol observations
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2010/1/18
We have developed an advanced data assimilation system for a global aerosol model with a four-dimensional ensemble Kalman filter in which the Level 1B data from the Cloud-Aerosol Lidar and Infrared Pa...