气候变化领域集成服务门户(CCPortal): Wintertime new particle formation and its contribution to cloud condensation nuclei in the Northeastern United States

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DOI	10.5194/acp-20-2591-2020
	Wintertime new particle formation and its contribution to cloud condensation nuclei in the Northeastern United States
	Yu F.; Luo G.; Arjunan Nair A.; Schwab J.J.; Sherman J.P.; Zhang Y.
发表日期	2020
ISSN	16807316
起始页码	2591
结束页码	2601
卷号	20 期号:4
英文摘要	Atmospheric particles can act as cloud condensation nuclei (CCN) and modify cloud properties and precipitation and thus indirectly impact the hydrological cycle and climate. New particle formation (NPF or nucleation), frequently observed at locations around the globe, is an important source of ultrafine particles and CCN in the atmosphere. In this study, wintertime NPF over the Northeastern United States (NEUS) is simulated with WRF-Chem coupled with a size-resolved (sectional) advanced particle microphysics (APM) model. Model-simulated variations in particle number concentrations during a 2-month period (November-December 2013) are in agreement with corresponding measurements taken at Pinnacle State Park (PSP), New York, and Appalachian State University (APP), North Carolina. We show that, even during wintertime, regional nucleation occurs and contributes significantly to ultrafine-particle and CCN number concentrations over the NEUS. The model shows that, due to low biogenic emissions during this period, wintertime regional nucleation is solely controlled by inorganic species and the newly developed ternary ion-mediated nucleation scheme is able to capture the variations in observed particle number concentrations (ranging from ∼200 to 20 000 cm-3) at both PSP and APP. Total particle and CCN number concentrations dramatically increase following NPF events and have the highest values over the Ohio Valley region, where elevated [SO2] is sustained by power plants. Secondary particles dominate particle number abundance over the NEUS, and their fraction increases with altitude from ≳85 % near the surface to ≳95 % in the upper troposphere. The secondary fraction of CCN also increases with altitude, from 20 %-50 % in the lower boundary layer to 50 %-60 % in the middle troposphere to 70 %-85 % in the upper troposphere. © Author(s) 2020.
关键词	cloud condensation nucleus concentration (composition)hydrological cycle particulate matter seasonal variation source apportionment California Ohio Valley [California]United States
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132196
推荐引用方式 GB/T 7714	Yu F.,Luo G.,Arjunan Nair A.,et al. Wintertime new particle formation and its contribution to cloud condensation nuclei in the Northeastern United States[J]. Atmospheric Chemistry and Physics,2020,20(4).
APA	Yu F.,Luo G.,Arjunan Nair A.,Schwab J.J.,Sherman J.P.,&Zhang Y..(2020).Wintertime new particle formation and its contribution to cloud condensation nuclei in the Northeastern United States.,20(4).
MLA	Yu F.,et al."Wintertime new particle formation and its contribution to cloud condensation nuclei in the Northeastern United States".20.4(2020).