0000000000307117

AUTHOR

James Allan

0000-0001-6492-4876

showing 3 related works from this author

Clouds and aerosols in Puerto Rico - a new evaluation

2007

The influence of aerosols, both natural and anthropogenic, remains a major area of uncertainty when predicting the properties and behaviour of clouds and their influence on climate. In an attempt to better understand warm cloud formation in a tropical marine environment, a period of intensive measurements took place in December 2004 in Puerto Rico, using some of the latest developments in online instrumentation such as aerosol mass spectrometers, cloud condensation nuclei counters and a hygroscopicity tandem differential mobility analyser. Simultaneous online measurements of aerosol size distributions, composition, hygroscopicity and optical properties were made near the lighthouse of Cape …

Atmospheric Science550010504 meteorology & atmospheric sciences010501 environmental sciencesAtmospheric sciences01 natural sciencescomplex mixtureslcsh:Chemistrychemistry.chemical_compoundNitrateddc:550Cloud condensation nucleiOrganic matter14. Life underwaterSea salt aerosolChemical composition0105 earth and related environmental scienceschemistry.chemical_classificationTotal organic carbon[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmospherelcsh:QC1-999AerosolJlcsh:QD1-999chemistry13. Climate actionLiquid water contentlcsh:Physics
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The role of VOC oxidation products in continental new particle formation

2008

Abstract. Aerosol physical and chemical properties and trace gas concentrations were measured during the QUEST field campaign in March–April, 2003, in Hyytiälä, Finland. Our aim was to understand the role of oxidation products of VOC's such as mono- and sesquiterpenes in atmospheric nucleation events. Particle chemical compositions were measured using the Aerodyne Aerosol Mass Spectrometer, and chemical compositions of aerosol samples collected with low-pressure impactors and a high volume sampler were analysed using a number of techniques. The results indicate that during and after new particle formation, all particles larger than 50 nm in diameter contained similar organic substances that…

[SDU.OCEAN]Sciences of the Universe [physics]/Ocean AtmosphereAtmospheric ScienceRange (particle radiation)010504 meteorology & atmospheric sciencesChemistry[SDU.OCEAN] Sciences of the Universe [physics]/Ocean AtmosphereNucleationAnalytical chemistry010501 environmental sciencesMass spectrometry01 natural scienceslcsh:QC1-999Trace gasAerosollcsh:Chemistrylcsh:QD1-999Volume (thermodynamics)13. Climate actionDifferential mobility analyzerParticle/dk/atira/pure/subjectarea/asjc/1900/1902lcsh:Physics0105 earth and related environmental sciences
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The molecular identification of organic compounds in the atmosphere: state of the art and challenges.

2015

SSCI-VIDE+ATARI:CARE+BNO:BDA; International audience

2-DIMENSIONAL GAS-CHROMATOGRAPHYChemistryCAPILLARY ELECTROPHORESIS/MASS SPECTROMETRYAtmosphereION-CYCLOTRON RESONANCENanotechnologyGeneral Chemistry[CHIM.CATA]Chemical Sciences/CatalysisPERFORMANCE LIQUID-CHROMATOGRAPHY[SDE.ES]Environmental Sciences/Environmental and SocietyHigh-Throughput Screening AssaysAtmospherePOLYCYCLIC AROMATIC-HYDROCARBONSHUMIC-LIKE SUBSTANCESChemistryPULSED-AMPEROMETRIC DETECTIONANION-EXCHANGE CHROMATOGRAPHYEnvironmental chemistryFLIGHT MASS-SPECTROMETRY540 ChemistryOrganic ChemicalsAIRBORNE PARTICULATE MATTERMolecular identificationEnvironmental MonitoringChemical reviews
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