Carbonaceous Aerosols at Various UK Locations: Source Attribution, Composition and Evolution
Carbonaceous aerosols contribute a significant amount to the submicron aerosol burden. Both black carbon (BC) and brown carbon, from absorbing organic material (OM), have been shown to be important absorbers of solar radiation, with important implications for the climate impacts of human activity. The results presented here are representative of urban, urban downwind and rural background environments in the UK. The chemical composition of aerosols and their atmospheric possessing across spatial and temporal scales are investigated. We examine the extent to which we are able to probe the physiochemical evolution of carbonaceous aerosol particles. A suite of novel instruments were deployed to characterize the aerosol properties. Specifically, an Aerodyne Time-of-Flight Aerosol Mass Spectrometer (ToF-AMS) measured the chemical composition of submicron non-refractory particulate matter, such as organic matter (OM), sulfate and nitrate as a function of size and a Droplet Measurement Technologies single particle soot photometer (SP2) measured the mass, size distribution and mixing state of refractory BC particles.Positive Matrix Factorization (PMF) analysis is applied to the mass spectra of OM to classify key types of organic particulate matter: Oxygenated organic aerosol (OOA) is a ubiquitous component in all environments; the emission of primary organic aerosol (POA) can be linked to types of identified sources, such as hydrocarbon-like OA (HOA) from vehicle emissions, solid fuel burning (SFOA) or cooking (COA) depending on anthropogenic activities. The emission of BC was correlated with POA linking to various sources. The experimental locations relative to pollutant sources and local meteorology influenced the constituents of carbonaceous aerosols and their diurnal patterns. Solid fuel burning was revealed to be an important contributing source under all types of environments during the winter time. The combined investigations under different environments suggest the OOA fraction and BC mixing state could indicate the extent of aerosol ageing.
CARBONACEOUS AEROSOL OM BC AMS SP2 PMF SOURCE ATTRIBUTION
Dantong Liu James Allan Michael Flynn Gerard Capes Gavin McMeeking Hugh Coe
School of Earth,Atmospheric and Environmental Sciences,The University of Manchester,Oxford Road,Manc School of Earth,Atmospheric and Environmental Sciences,The University of Manchester,Oxford Road,Manc
国际会议
西安
英文
190-203
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）