gchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD025619
Title:
Laboratory observations of temperature and humidity dependencies of nucleation and growth rates of sub-3 nm particles
Author: Yu H.; Dai L.; Zhao Y.; Kanawade V.P.; Tripathi S.N.; Ge X.; Chen M.; Lee S.-H.
Source Publication: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
Indexed By: SCI ; SCI-E
Publishing Year: 2017
Volume: 122, Issue:3
pages begin: 1919
pages end: 1929
Language: 英语
Keyword: atmospheric sub-3 nm particles ; growth rate ; nucleation rate
Scopus Keyword: aerosol ; algorithm ; boundary layer ; concentration (composition) ; condensation ; experimental study ; growth rate ; laboratory method ; nucleation ; particle size ; relative humidity ; sulfuric acid ; temperature ; temperature gradient
Subject in Chinese: 冷凝 ; 潮湿 ; 凝结
Subject: CONDENSATION ; HUMIDITY
English Abstract: Temperature and relative humidity (RH) are the most important thermodynamic parameters in aerosol formation, yet laboratory studies of nucleation and growth dependencies on temperature and RH are lacking. Here we report the experimentally observed temperature and RH dependences of sulfuric acid aerosol nucleation and growth. Experiments were performed in a flow tube in the temperature range from 248 to 313 K, RH from 0.8% to 79%, and relative acidity (RA) of sulfuric acid from 6 × 10−5 to 0.38 (2 × 107–109 cm−3). The impurity levels of base compounds were determined to be NH3 < 23 pptv (parts per thousand by volume), methylamine < 1.5 pptv, and dimethylamine < 0.52 pptv. Our results showed that low temperatures favor nucleation at fixed sulfuric acid concentration but impede nucleation when RA is fixed. It is also shown that binary nucleation of sulfuric acid and water is negligible in planetary boundary layer temperature and sulfuric acid ranges. An empirical algorithm was derived to correlate the nucleation rate with RA, RH, and temperature together. Collision-limited condensation of free-sulfuric acid molecules fails to predict the observed growth rate in the sub-3 nm size range, as well as its dependence on temperature and RH. This suggests that evaporation, sulfuric acid hydration, and possible involvement of other ternary molecules should be considered for the sub-3 nm particle growth. ©2017. American Geophysical Union. All Rights Reserved.
Funding Project: 1241498 ; 1241498 ; 41405116 ; 41675124 ; AGS-1137821 ; AGS-1137821 ; BK20140989
Citation statistics:
被引频次[WOS]:9   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Identifier: http://119.78.100.177/globalchange/handle/2HF3EXSE/62714
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

Files in This Item:

There are no files associated with this item.


Affiliation: School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China; University Centre for Earth and Space Sciences, University of Hyderabad, Hyderabad, India; Centre for Environmental Science and Engineering and Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, India; Department of Atmospheric Sciences, University of Alabama in Huntsville, Huntsville, AL, United States

Recommended Citation:
Yu H.,Dai L.,Zhao Y.,et al. Laboratory observations of temperature and humidity dependencies of nucleation and growth rates of sub-3 nm particles[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(3)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Yu H.]'s Articles
[Dai L.]'s Articles
[Zhao Y.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Yu H.]'s Articles
[Dai L.]'s Articles
[Zhao Y.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Yu H.]‘s Articles
[Dai L.]‘s Articles
[Zhao Y.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.