The impact of the atmospheric turbulence-development tendency on new particle formation : a common finding on three continents

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Wu , H , Li , Z , Li , H , Luo , K , Wang , Y , Yan , P , Hu , F , Zhang , F , Sun , Y , Shang , D , Liang , C , Zhang , D , Wei , J , Wu , T , Jin , X , Fan , X , Cribb , M , Fischer , M L , Kulmala , M & Petäjä , T 2021 , ' The impact of the atmospheric turbulence-development tendency on new particle formation : a common finding on three continents ' , National science review , vol. 8 , no. 3 , 157 . https://doi.org/10.1093/nsr/nwaa157

Title: The impact of the atmospheric turbulence-development tendency on new particle formation : a common finding on three continents
Author: Wu, Hao; Li, Zhanqing; Li, Hanqing; Luo, Kun; Wang, Yuying; Yan, Peng; Hu, Fei; Zhang, Fang; Sun, Yele; Shang, Dongjie; Liang, Chunsheng; Zhang, Dongmei; Wei, Jing; Wu, Tong; Jin, Xiaoai; Fan, Xinxin; Cribb, Maureen; Fischer, Marc L.; Kulmala, Markku; Petäjä, Tuukka
Contributor: University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
Date: 2021-03
Language: eng
Number of pages: 11
Belongs to series: National science review
ISSN: 2095-5138
URI: http://hdl.handle.net/10138/332284
Abstract: A new mechanism of new particle formation (NPF) is investigated using comprehensive measurements of aerosol physicochemical quantities and meteorological variables made in three continents, including Beijing, China; the Southern Great Plains site in the USA; and SMEAR II Station in Hyytiala, Finland. Despite the considerably different emissions of chemical species among the sites, a common relationship was found between the characteristics of NPF and the stability intensity. The stability parameter (zeta = Z/L, where Z is the height above ground and L is the Monin-Obukhov length) is found to play an important role; it drops significantly before NPF as the atmosphere becomes more unstable, which may serve as an indicator of nucleation bursts. As the atmosphere becomes unstable, the NPF duration is closely related to the tendency for turbulence development, which influences the evolution of the condensation sink. Presumably, the unstable atmosphere may dilute pre-existing particles, effectively reducing the condensation sink, especially at coarse mode to foster nucleation. This new mechanism is confirmed by model simulations using a molecular dynamic model that mimics the impact of turbulence development on nucleation by inducing and intensifying homogeneous nucleation events.
Subject: 114 Physical sciences
new particle formation
turbulence development
molecular dynamic
new particle formation
turbulence development
molecular dynamic
CLOUD CONDENSATION NUCLEI
DIRECT NUMERICAL-SIMULATION
BOUNDARY-LAYER DYNAMICS
SULFURIC-ACID
SIZE DISTRIBUTION
FORMATION EVENTS
SURFACE-LAYER
AEROSOL
NUCLEATION
GROWTH
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