DOI: 10.1016/j.atmosenv.2020.117413
论文题名: Impact of biogenic emissions of organic matter from a cool-temperate forest on aerosol optical properties: Impact of biogenic organic aerosols on aerosol optical properties
作者: Müller A. ; Aoki K. ; Tachibana E. ; Hiura T. ; Miyazaki Y.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 229 语种: 英语
英文关键词: Atmospheric aerosols
; Atmospheric movements
; Biogeochemistry
; Budget control
; Floors
; Forestry
; Light absorption
; Monoterpenes
; Olefins
; Sulfur compounds
; Aerosol chemical composition
; Aerosol optical depths
; Aerosol optical property
; Cool temperate forests
; Secondary organic aerosols
; Single scattering albedo
; Vertical transports
; Water-soluble organic matter
; Optical properties
; organic matter
; pinene
; sulfate
; aerosol
; aerosol composition
; biogenic emission
; cooling
; optical depth
; optical property
; organic matter
; scattering
; seasonality
; solubility
; temperate forest
; aerosol
; albedo
; Article
; autumn
; canopy
; chemical composition
; chemical parameters
; light absorption
; mass
; priority journal
; seasonal variation
; secondary organic aerosol
; summer
; temperate deciduous forest
; urban area
学科: Aerosol optical properties
; Biogenic secondary organic aerosols
; Sky radiometer
; Water-soluble aerosols
中文摘要: Terrestrial biogenic emissions of organic matter can affect the optical properties of atmospheric aerosols and thus impact the radiation budget. To investigate this, the chemical parameters of submicrometer water-soluble aerosols (WSA) collected on filters were compared to optical properties measured by a sky radiometer at a cool-temperate forest site in northern Japan. From June to December 2015, the WSA samples were collected within the forest canopy, while aerosol optical depth (AOD), single scattering albedo (SSA), absorption Ångström exponent (AAE), and scattering Ångström exponent (SAE) were retrieved above the canopy. The optical properties were compared with the filter-based chemical parameters only when the vertical transport of aerosol particles from the forest canopy to the air above it was significant. The result showed that the AOD and the mass concentrations of WSA exhibited similar and distinct seasonal variations with peaks in summer and autumn. In summer, sulfate accounted for 60% of the mass of WSA, which was linked to a high SSA (>0.95), low AAE (1.15 ± 0.84), and low SAE (1.25 ± 0.22). In contrast, water-soluble organic matter (WSOM) accounted for 70% of the mass of WSA in autumn. This large fraction of WSOM was associated with a decrease in SSA (0.90–0.95) and an increase in AAE (2.45 ± 0.91) and SAE (1.46 ± 0.15). The results suggest that in summer, aerosol particles with a greater size range corresponded to aerosol chemical compositions dominated by sulfate. In contrast, smaller particles with a strong light absorption at shorter wavelengths, were likely important in autumn and associated with a composition dominated by WSOM. The majority of WSOM in autumn has previously been associated with emissions of α-pinene from the forest floor and the subsequent formation of biogenic secondary organic aerosols (BSOA). This study indicates that α-pinene-derived SOAs, mostly originating from the forest floor, were associated with a summer to autumn decrease in SSA. This process can modulate the radiative effect on a regional scale. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160380
Appears in Collections: 气候变化与战略
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作者单位: Institute of Low Temperature Science, Hokkaido University, Sapporo, 060-0819, Japan; Graduate School of Science and Engineering, University of Toyama, Toyama, 930-8555, Japan; Field Science Center for Northern Biosphere, Hokkaido University, Sapporo, 060-0809, Japan
Recommended Citation:
Müller A.,Aoki K.,Tachibana E.,et al. Impact of biogenic emissions of organic matter from a cool-temperate forest on aerosol optical properties: Impact of biogenic organic aerosols on aerosol optical properties[J]. Atmospheric Environment,2020-01-01,229