DOI: 10.1016/j.atmosenv.2013.11.065
Scopus记录号: 2-s2.0-84893198462
论文题名: Spatially and seasonally resolved estimate of the ratio of organic mass to organic carbon
作者: Philip S ; , Martin R ; V ; , Pierce J ; R ; , Jimenez J ; L ; , Zhang Q ; , Canagaratna M ; R ; , Spracklen D ; V ; , Nowlan C ; R ; , Lamsal L ; N ; , Cooper M ; J ; , Krotkov N ; A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 87 起始页码: 34
结束页码: 40
语种: 英语
英文关键词: AMS
; GEOS-Chem
; NO2
; OMI
; Organic aerosol
; Organic carbon
Scopus关键词: Aerosol mass spectrometers
; AMS
; Combustion emissions
; GEOS-Chem
; OMI
; Organic aerosol
; Particulate organic matters
; Spatial variations
; Aerosols
; Air quality
; Computer simulation
; Estimation
; Organic carbon
; Troposphere
; Nitrogen oxides
; nitrogen oxide
; organic carbon
; accelerator mass spectrometry
; air quality
; ambient air
; atmospheric pollution
; biomass burning
; data set
; EOS
; nitric oxide
; organic carbon
; organic matter
; seasonal variation
; spatial variation
; air analysis
; air quality
; article
; biomass
; combustion
; exhaust gas
; marine environment
; particulate matter
; priority journal
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Particulate organic matter is of interest for air quality and climate research, but the relationship between ambient organic mass (OM) and organic carbon (OC) remains ambiguous both in measurements and in modeling. We present a simple method to derive an estimate of the spatially and seasonally resolved global, lower tropospheric, ratio between OM and OC. We assume ambient NO2 concentrations as a surrogate for fresh emission which mostly determines the continental scale OM/OC ratio. For this, we first develop a parameterization for the OM/OC ratio using the primary organic aerosol (POA) fraction of total OM estimated globally from Aerosol Mass Spectrometer (AMS) measurements, and evaluate it with high mass resolution AMS data. Second, we explore the ability of ground-level NO2 concentrations derived from the OMI satellite sensor to serve as a proxy for fresh emissions that have a high POA fraction, and apply NO2 data to derive ambient POA fraction. The combination of these two methods yields an estimate of OM/OC from NO2 measurements. Although this method has inherent deficiencies over biomass burning, free-tropospheric, and marine environments, elsewhere it offers more information than the currently used global-mean OM/OC ratios. The OMI-derived global OM/OC ratio ranges from 1.3 to 2.1 (μg/μgC), with distinct spatial variation between urban and rural regions. The seasonal OM/OC ratio has a summer maximum and a winter minimum over regions dominated by combustion emissions. This dataset serves as a tool for interpreting organic carbon measurements, and for evaluating modeling of atmospheric organics. We also develop an additional parameterization for models to estimate the ratio of primary OM to OC from simulated NOx concentrations. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80729
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Department of Chemistry and Biochemistry, CIRES, University of Colorado, Boulder, CO, United States; Department of Environmental Toxicology, University of California, Davis, CA, United States; Aerodyne Research, Billerica, MA, United States; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Philip S,, Martin R,V,et al. Spatially and seasonally resolved estimate of the ratio of organic mass to organic carbon[J]. Atmospheric Environment,2014-01-01,87