气候变化领域集成服务门户(CCPortal): 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

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DOI	10.1016/j.atmosenv.2020.117413
	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
	Müller A.; Aoki K.; Tachibana E.; Hiura T.; Miyazaki Y.
发表日期	2020
ISSN	1352-2310
卷号	229
英文摘要	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
英文关键词	Aerosol optical properties; Biogenic secondary organic aerosols; Sky radiometer; Water-soluble aerosols
语种	英语
scopus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
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129543
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
推荐引用方式 GB/T 7714	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],2020,229.
APA	Müller A.,Aoki K.,Tachibana E.,Hiura T.,&Miyazaki Y..(2020).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.Atmospheric Environment,229.
MLA	Müller A.,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".Atmospheric Environment 229(2020).