气候变化领域集成服务门户(CCPortal): New particle formation and growth during summer in an urban environment: a dual chamber study

CCPortal

DOI	10.5194/acp-23-85-2023
	New particle formation and growth during summer in an urban environment: a dual chamber study
	Jorga, Spiro D.; Florou, Kalliopi; Patoulias, David; Pandis, Spyros N.
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	85
结束页码	97
卷号	23 期号:1 页码:13
英文摘要	Nucleation and subsequent growth are a major source of new particles in many environments, but the pollutants involved and the details of the corresponding processes are still under debate. While sulfuric acid has a major role in new particle formation under a lot of conditions, the role of ammonia, amines, and organic vapors is less clear. In most continental areas, new particle formation is quite frequent especially on relatively clean, sunny days when there is some sulfur dioxide available. In parts of the Eastern Mediterranean even if all the previous requirements are satisfied, new particle formation events are relatively rare during summertime. In this work, we take advantage of this unexpected low, new particle formation frequency in Greece and use a dual atmospheric simulation chamber system with starting point ambient air in an effort to gain insight about the chemical species that is limiting nucleation in this area. A potential nucleation precursor, ammonia, was added in one of the chambers, while the other one was used as a reference. Three different types of outcomes were observed: new particle formation only in the perturbed chamber, new particle formation in both chambers, and no observed new particle formation. The addition of ammonia assisted in new particle formation in almost 50 % of the experiments conducted. The growth rate of the newly formed particles ranged from 3-11 nm h(-1), with particles reaching a diameter of 20-25 nm after a few hours. The nucleation rate was estimated using an aerosol dynamics model and was found to be in the range of 500 to 25 000 particles cm(-3) h(-1) in the different experiments. These results support the hypothesis that ammonia at levels of several ppb can accelerate or even cause new particle formation, at least in the environment of the Eastern Mediterranean.
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:000907150700001
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/273763
作者单位	Carnegie Mellon University; Foundation for Research & Technology - Hellas (FORTH); Institute of Chemical Engineering Sciences (ICE-HT); University of Patras
推荐引用方式 GB/T 7714	Jorga, Spiro D.,Florou, Kalliopi,Patoulias, David,et al. New particle formation and growth during summer in an urban environment: a dual chamber study[J],2023,23(1):13.
APA	Jorga, Spiro D.,Florou, Kalliopi,Patoulias, David,&Pandis, Spyros N..(2023).New particle formation and growth during summer in an urban environment: a dual chamber study.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(1),13.
MLA	Jorga, Spiro D.,et al."New particle formation and growth during summer in an urban environment: a dual chamber study".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.1(2023):13.