干旱区生态环境知识资源中心(Arid): Asian dust observed during KORUS-AQ facilitates the uptake and incorporation of soluble pollutants during transport to South Korea

Arid

DOI	10.1016/j.atmosenv.2020.117305
	Asian dust observed during KORUS-AQ facilitates the uptake and incorporation of soluble pollutants during transport to South Korea
	Heim, E. W.1,9; Dibb, J.1; Scheuer, E.1; Jost, P. Campuzano 2,3; Nault, B. A.2,3; Jimenez, J. L.2,3; Peterson, D.4; Knote, C.5; Fenn, M.6; Hair, J.6; Beyersdorf, A. J.6,7; Corr, C.6,8; Anderson, B. E.6
通讯作者	Heim, E. W.
来源期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
EISSN	1873-2844
出版年	2020
卷号	224
英文摘要	The air quality of South Korea was the focus of the NASA/NIER KORean -United States Air Quality (KORUS-AQ) mission of 2016. KORUS-AQ was planned for the period after the spring peak in outbreaks of Asian dust. Regardless of this strategic planning, quantifiable dust was still observed via instrumentation on the NASA DC8 in early May. A novel analysis of supermicron dust and associated supermicron ionic relationships was completed using two size dependent instruments. This supermicron dust provided surface area for heterogeneous chemistry between CaCO3, the gases HNO3, NO2, and SO2, and particulate (NH4)(2)SO4. Uptake of the pollutant gases is greatly enhanced by formation of an aqueous layer on the surface of the dust particles. More water is attracted to particles where uptake of HNO3 has replaced surface CaCO3 with Ca(NO3)(2) generating a dynamic aqueous layer on the dust particle. We propose that particulate (NH4)(2)SO4 coagulated with dust to form (NH4)(2)Ca(SO4)(2) on the particle surface, which rapidly formed CaSO4 and NH4+ in a Ca(NO3)(2) facilitated aqueous layer. A conceptual model is proposed to explain these dust uptake chemical processes. We define the nanoequivalent concentration of supermicron SO42- plus NO3 over the nanoequivalent concentration of supermicron NH4+ plus Ca2+ as the Dust Pollution Index (DPI), used to quantify the extent to which carbonate dust has been modified. DPI values range from 0 (pure dust) to 1 (completely reacted); thus, it represents the conversion of CaCO3 into secondary salts. This mechanism should be used to better predict chemical dynamics in atmospheric models while also helping to further explain the importance of dust and secondary coating on cloud formation processes and dust optical properties. Air masses containing dust that traversed industrial China while mixing with polluted southern air had significantly higher DPI values (average = 0.82, 1s = 0.10) compared to air masses that limited interaction with such pollution (average = 0.51, 1s = 0.13).
类型	Article
语种	英语
国家	USA ; Germany
收录类别	SCI-E
WOS记录号	WOS:000525865300019
WOS关键词	SPECTRAL-RESOLUTION LIDAR ; PARTICLE DISPERSION MODEL ; MINERAL DUST ; HETEROGENEOUS REACTIONS ; HYGROSCOPIC BEHAVIOR ; CALCIUM-CARBONATE ; NORTH PACIFIC ; GOBI DESERT ; NITRIC-ACID ; AEROSOLS
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
来源机构	Colorado State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314147
作者单位	1.Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA; 2.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 3.Univ Colorado, Dept Chem, Boulder, CO 80309 USA; 4.Naval Res Lab, Monterey, CA USA; 5.Ludwig Maximilians Univ Munchen, Munich, Germany; 6.NASA, Langley Res Ctr, Hampton, VA 23665 USA; 7.Calif State Univ San Bernardino, San Bernardino, CA 92407 USA; 8.Colorado State Univ, Ft Collins, CO 80523 USA; 9.Utah State Univ, Dept Watershed Sci, Logan, UT 84322 USA
推荐引用方式 GB/T 7714	Heim, E. W.,Dibb, J.,Scheuer, E.,et al. Asian dust observed during KORUS-AQ facilitates the uptake and incorporation of soluble pollutants during transport to South Korea[J]. Colorado State University,2020,224.
APA	Heim, E. W..,Dibb, J..,Scheuer, E..,Jost, P. Campuzano.,Nault, B. A..,...&Anderson, B. E..(2020).Asian dust observed during KORUS-AQ facilitates the uptake and incorporation of soluble pollutants during transport to South Korea.ATMOSPHERIC ENVIRONMENT,224.
MLA	Heim, E. W.,et al."Asian dust observed during KORUS-AQ facilitates the uptake and incorporation of soluble pollutants during transport to South Korea".ATMOSPHERIC ENVIRONMENT 224(2020).