DOI: 10.1016/j.atmosenv.2015.08.039
Scopus记录号: 2-s2.0-84939614120
论文题名: Impact of wildfires on size-resolved aerosol composition at a coastal California site
作者: Maudlin L ; C ; , Wang Z ; , Jonsson H ; H ; , Sorooshian A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 119 起始页码: 59
结束页码: 68
语种: 英语
英文关键词: Aerosol
; Biomass burning
; Cloud water
; Composition
; Marine
; MOUDI
; Soil
Scopus关键词: Aerosols
; Biomass
; Chemical analysis
; Marine pollution
; Micrometers
; Nitrates
; Particles (particulate matter)
; Sodium sulfate
; Soils
; Sulfur compounds
; Biomass-burning
; Cloud condensation nuclei
; Cloud water
; Elemental compositions
; Marine
; Mass size distribution
; MOUDI
; Water-soluble species
; Fires
; ammonia
; chloride
; dicarboxylic acid
; glutaric acid
; glyoxylic acid
; maleic acid
; malonic acid
; nitrate
; oxalic acid
; pyruvic acid
; sodium
; succinic acid
; sulfate
; aerosol composition
; atmospheric plume
; atmospheric pollution
; carboxylic acid
; cloud water
; coastal zone
; marine pollution
; nitrate
; pollutant source
; potassium
; wildfire
; aerosol
; Article
; biomass
; controlled study
; fire
; limit of detection
; mass spectrometry
; plume
; priority journal
; residential area
; seashore
; secondary organic aerosol
; size resolved aerosol
; United States
; wet deposition
; wildfire
; California
; United States
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: Size-resolved aerosol composition measurements were conducted at a coastal site in central California during the Nucleation in California Experiment (NiCE) between July and August of 2013. The site is just east of ship and marine emission sources and is also influenced by continental pollution and wildfires, such as those near the California-Oregon border which occurred near the end of NiCE. Two micro-orifice uniform deposit impactors (MOUDIs) were used, and water-soluble and elemental compositions were measured. The five most abundant water-soluble species (in decreasing order) were chloride, sodium, non-sea salt (nss) sulfate, ammonium, and nitrate. During wildfire periods, nss K mass concentrations were not enhanced as strongly as other species in the sub-micrometer stages and even decreased in the super-micrometer stages; species other than nss K are more reliable tracers for biomass burning in this region. Chloride levels were reduced in the fire sets likely due to chloride depletion by inorganic and organic acids that exhibited elevated levels in transported plumes. During wildfire periods, the mass size distribution of most dicarboxylic acids changed from unimodal to bimodal with peaks in the 0.32 μm and 1.0-1.8 μm stages. Furthermore, sulfate's peak concentration shifted from the 0.32 μm to 0.56 μm stage, and nitrate also shifted to larger sizes (1.0 μm to 1.8-3.2 μm stages). Mass concentrations of numerous soil tracer species (e.g., Si, Fe) were strongly enhanced in samples influenced by wildfires, especially in the sub-micrometer range. Airborne cloud water data confirm that soil species were associated with fire plumes transported south along the coast. In the absence of biomass burning, cloud condensation nuclei (CCN) composition is dominated by nss sulfate and ammonium, and the water-soluble organic fraction is dominated by methanesulfonate, whereas for the samples influenced by wildfires, ammonium becomes the dominant overall species, and oxalate is the most abundant organic species. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81520
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Arizona, Tucson, AZ, United States; Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, United States; Naval Postgraduate School, MontereyCA, United States
Recommended Citation:
Maudlin L,C,, Wang Z,et al. Impact of wildfires on size-resolved aerosol composition at a coastal California site[J]. Atmospheric Environment,2015-01-01,119