气候变化领域集成服务门户(CCPortal): New Particle Formation and Growth to Climate-Relevant Aerosols at a Background Remote Site in the Western Himalaya

CCPortal

DOI	10.1029/2020JD033267
	New Particle Formation and Growth to Climate-Relevant Aerosols at a Background Remote Site in the Western Himalaya
	Sebastian M.; Kanawade V.P.; Soni V.K.; Asmi E.; Westervelt D.M.; Vakkari V.; Hyvärinen A.-P.; Pierce J.R.; Hooda R.K.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	New particle formation (NPF) can influence the Earth's radiative budget when the newly formed particles grow to climate-relevant sizes. Here, we present analysis of 21 months of continuous aerosol size distribution measurements at a background remote site in the western Himalaya and provide observational evidence that newly formed particles grow to cloud condensation nuclei (CCN)-active sizes (i.e., >20–100 nm in diameter). Out of total 55 NPF events, 38 (66%) events occurred in the pre-monsoon season (March–May). NPF events were classified into those with and without pollution influence as polluted and cleaner, respectively, using black carbon data. The analysis of air mass age, based on the ratio of number concentration of Aitken to accumulation mode aerosols, indicated that NPF occurred in the relatively cleaner air masses reaching to the site. The median formation rate of 10 nm particles and particle growth rates for cleaner events were three-fold and two-fold, respectively, higher than polluted events. We present the first estimates of the survival probability of newly formed particles to 50 and 100 nm size, which was not attempted in an Indian environment previously. The survival probability to 50 nm particles ranged from 44% to 98%, with a mean and standard deviation of 82 ± 18%. On average, ∼60% of the particles surviving to 50 nm survived to 100 nm, making the overall survival probability of 100 nm to 53 ± 31%. This indicates that the probability of nucleated particles growing to CCN-active sizes under a large source of condensing vapor (transported from nearby lower-altitude regions) and low pre-existing particle concentrations (background mountain site) is high compared to the previous studies. These findings highlight the importance of the efficiency of nucleation events for producing CCN, which is a critical basis of aerosol indirect effects. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	cloud condensation nuclei; new particle formation; particle growth; the Himalaya
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185369
作者单位	Centre for Earth, Ocean and Atmospheric Sciences, University of Hyderabad, Hyderabad, India; India Meteorological Department, Ministry of Earth Sciences, New Delhi, India; Finnish Meteorological Institute, Erik Palmenin Aukio 1, Helsinki, Finland; Servicio Meteorológico Nacional, Buenos Aires, Argentina; Columbia University, Lamont-Doherty Earth ObservatoryNY, United States; NASA Goddard Institute for Space Studies, New York, NY, United States; Atmospheric Chemistry Research Group, North-West University, Potchefstroom, South Africa; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
推荐引用方式 GB/T 7714	Sebastian M.,Kanawade V.P.,Soni V.K.,et al. New Particle Formation and Growth to Climate-Relevant Aerosols at a Background Remote Site in the Western Himalaya[J],2021,126(7).
APA	Sebastian M..,Kanawade V.P..,Soni V.K..,Asmi E..,Westervelt D.M..,...&Hooda R.K..(2021).New Particle Formation and Growth to Climate-Relevant Aerosols at a Background Remote Site in the Western Himalaya.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Sebastian M.,et al."New Particle Formation and Growth to Climate-Relevant Aerosols at a Background Remote Site in the Western Himalaya".Journal of Geophysical Research: Atmospheres 126.7(2021).