globalchange  > 气候变化与战略
DOI: 10.1073/pnas.0801355105
论文题名:
High frequency new particle formation in the Himalayas
作者: Venzac H.; Sellegri K.; Laj P.; Villani P.; Bonasoni P.; Marinoni A.; Cristofanelli P.; Calzolari F.; Fuzzi S.; Decesari S.; Facchini M.-C.; Vuillermoz E.; Verza G.P.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2008
卷: 105, 期:41
起始页码: 15666
结束页码: 15671
语种: 英语
英文关键词: Aerosols ; Free troposphere ; High altitude ; Nucleation
Scopus关键词: ion ; aerosol ; air monitoring ; air pollution ; altitude ; article ; atmosphere ; climate ; concentration (parameters) ; geographic distribution ; particle size ; particulate matter ; pilot study ; priority journal ; sea level ; troposphere ; wind ; Aerosols ; Air Movements ; Air Pollutants ; Altitude ; Atmosphere ; Ions ; Nanoparticles ; Nepal ; Particulate Matter
英文摘要: Rising air pollution levels in South Asia will have worldwide environmental consequences. Transport of pollutants from the densely populated regions of India, Pakistan, China, and Nepal to the Himalayas may lead to substantial radiative forcing in South Asia with potential effects on the monsoon circulation and, hence, on regional climate and hydrological cycles, as well as to dramatic impacts on glacier retreat. An improved description of particulate sources is needed to constrain the simulation of future regional climate changes. Here, the first evidence of very frequent new particle formation events occurring up to high altitudes is presented. A 16-month record of aerosol size distribution from the Nepal Climate Observatory at Pyramid (Nepal, 5,079 m above sea level), the highest atmospheric research station, is shown. Aerosol concentrations are driven by intense ultrafine particle events occurring on >35% of the days at the interface between clean tropospheric air and the more polluted air rising from the valleys. During a pilot study, we observed a significant increase of ion cluster concentrations with the onset of new particle formation events. The ion clusters rapidly grew to a 10-nm size within a few hours, confirming, thus, that in situ nucleation takes place up to high altitudes. The initiation of the new particle events coincides with the shift from free tropospheric downslope winds to thermal upslope winds from the valley in the morning hours. The new particle formation events represent a very significant additional source of particles possibly injected into the free troposphere by thermal winds. © 2008 by The National Academy of Sciences of the USA.
Citation statistics:
被引频次[WOS]:113   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162457
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Venzac, H., Laboratoire de Météorologie Physique, Observatoire de Physique du Globe de Clermont-Ferrand, Université Blaise Pascal, 24 avenue des Landais, 63177 Aubière, France; Sellegri, K., Laboratoire de Météorologie Physique, Observatoire de Physique du Globe de Clermont-Ferrand, Université Blaise Pascal, 24 avenue des Landais, 63177 Aubière, France; Laj, P., Laboratoire de Météorologie Physique, Observatoire de Physique du Globe de Clermont-Ferrand, Université Blaise Pascal, 24 avenue des Landais, 63177 Aubière, France, Consiglio Nazionale Delle Ricerche, Institute for Atmospheric Sciences and Climate, via Gobetti 101, I-40129 Bologna, Italy, Laboratoire de Glaciologie et Géophysique de l'Environnement, Observatoire de Sciences de l'Univers de Grenoble, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France; Villani, P., Laboratoire de Météorologie Physique, Observatoire de Physique du Globe de Clermont-Ferrand, Université Blaise Pascal, 24 avenue des Landais, 63177 Aubière, France; Bonasoni, P., Consiglio Nazionale Delle Ricerche, Institute for Atmospheric Sciences and Climate, via Gobetti 101, I-40129 Bologna, Italy; Marinoni, A., Consiglio Nazionale Delle Ricerche, Institute for Atmospheric Sciences and Climate, via Gobetti 101, I-40129 Bologna, Italy; Cristofanelli, P., Consiglio Nazionale Delle Ricerche, Institute for Atmospheric Sciences and Climate, via Gobetti 101, I-40129 Bologna, Italy; Calzolari, F., Consiglio Nazionale Delle Ricerche, Institute for Atmospheric Sciences and Climate, via Gobetti 101, I-40129 Bologna, Italy; Fuzzi, S., Consiglio Nazionale Delle Ricerche, Institute for Atmospheric Sciences and Climate, via Gobetti 101, I-40129 Bologna, Italy; Decesari, S., Consiglio Nazionale Delle Ricerche, Institute for Atmospheric Sciences and Climate, via Gobetti 101, I-40129 Bologna, Italy; Facchini, M.-C., Consiglio Nazionale Delle Ricerche, Institute for Atmospheric Sciences and Climate, via Gobetti 101, I-40129 Bologna, Italy; Vuillermoz, E., Ev-K2-Consiglio Nazionale Delle Ricerche, via San Bernardino 145, 24126 Bergamo, Italy; Verza, G.P., Ev-K2-Consiglio Nazionale Delle Ricerche, via San Bernardino 145, 24126 Bergamo, Italy

Recommended Citation:
Venzac H.,Sellegri K.,Laj P.,et al. High frequency new particle formation in the Himalayas[J]. Proceedings of the National Academy of Sciences of the United States of America,2008-01-01,105(41)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Venzac H.]'s Articles
[Sellegri K.]'s Articles
[Laj P.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Venzac H.]'s Articles
[Sellegri K.]'s Articles
[Laj P.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Venzac H.]‘s Articles
[Sellegri K.]‘s Articles
[Laj P.]‘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.