气候变化领域集成服务门户(CCPortal): Intensive aerosol properties of boreal and regional biomass burning aerosol at Mt. Bachelor Observatory: larger and black carbon (BC)-dominant particles transported from Siberian wildfires

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DOI	10.5194/acp-23-2747-2023
	Intensive aerosol properties of boreal and regional biomass burning aerosol at Mt. Bachelor Observatory: larger and black carbon (BC)-dominant particles transported from Siberian wildfires
	May, Nathaniel W.; Bernays, Noah; Farley, Ryan; Zhang, Qi; Jaffe, Daniel A.
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	2747
结束页码	2764
卷号	23 期号:4 页码:18
英文摘要	We characterize the aerosol physical and optical properties of 13 transported biomass burning (BB) events. BB events included long-range influence from fires in Alaskan and Siberian boreal forests transported to Mt. Bachelor Observatory (MBO) in the free troposphere (FT) over 8-14+ d and regional wildfires in northern California and southwestern Oregon transported to MBO in the boundary layer (BL) over 10 h to 3 d. Intensive aerosol optical properties and normalized enhancement ratios for BB events were derived from measured aerosol light scattering coefficients (sigma(scat)), aerosol light-absorbing coefficients (sigma(abs)), fine particulate matter (PM1), and carbon monoxide (CO) measurements made from July to September 2019, with particle size distribution collected from August to September. The observations showed that the Siberian BB events had a lower scattering Angstrom exponent (SAE), a higher mass scattering efficiency (MSE; delta sigma(scat)/delta PM1), and a bimodal aerosol size distribution with a higher geometric mean diameter (D-g). We hypothesize that the larger particles and associated scattering properties were due to the transport of fine dust alongside smoke in addition to contributions from condensation of secondary aerosol, coagulation of smaller particles, and aqueous-phase processing during transport. Alaskan and Siberian boreal forest BB plumes were transported long distances in the FT and characterized by lower absorption Angstrom exponent (AAE) values indicative of black carbon (BC) dominance in the radiative budget. Significantly elevated AAE values were only observed for BB events with < 1 d transport, which suggests strong production of brown carbon (BrC) in these plumes but limited radiative forcing impacts outside of the immediate region.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000941185700001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273350
作者单位	University of Washington; University of Washington Bothell; University of California System; University of California Davis
推荐引用方式 GB/T 7714	May, Nathaniel W.,Bernays, Noah,Farley, Ryan,et al. Intensive aerosol properties of boreal and regional biomass burning aerosol at Mt. Bachelor Observatory: larger and black carbon (BC)-dominant particles transported from Siberian wildfires[J],2023,23(4):18.
APA	May, Nathaniel W.,Bernays, Noah,Farley, Ryan,Zhang, Qi,&Jaffe, Daniel A..(2023).Intensive aerosol properties of boreal and regional biomass burning aerosol at Mt. Bachelor Observatory: larger and black carbon (BC)-dominant particles transported from Siberian wildfires.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(4),18.
MLA	May, Nathaniel W.,et al."Intensive aerosol properties of boreal and regional biomass burning aerosol at Mt. Bachelor Observatory: larger and black carbon (BC)-dominant particles transported from Siberian wildfires".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.4(2023):18.