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Severe Pollution in China Amplified by Atmospheric Moisture
Tie, Xuexi1,2,3,4; Huang, Ru-Jin1,2,5,6; Cao, Junji1; Zhang, Qiang7; Cheng, Yafang8; Su, Hang8; Chang, Di8; Poeschl, Ulrich8; Hoffmann, Thorsten9; Dusek, Uli10; Li, Guohui1; Worsnop, Douglas R.11; O'Dowd, Colin D.5,6
AbstractIn recent years, severe haze events often occurred in China, causing serious environmental problems. The mechanisms responsible for the haze formation, however, are still not well understood, hindering the forecast and mitigation of haze pollution. Our study of the 2012-13 winter haze events in Beijing shows that atmospheric water vapour plays a critical role in enhancing the heavy haze events. Under weak solar radiation and stagnant moist meteorological conditions in winter, air pollutants and water vapour accumulate in a shallow planetary boundary layer (PBL). A positive feedback cycle is triggered resulting in the formation of heavy haze: (1) the dispersal of water vapour is constrained by the shallow PBL, leading to an increase in relative humidity (RH); (2) the high RH induces an increase of aerosol particle size by enhanced hygroscopic growth and multiphase reactions to increase particle size and mass, which results in (3) further dimming and decrease of PBL height, and thus further depressing of aerosol and water vapour in a very shallow PBL. This positive feedback constitutes a self-amplification mechanism in which water vapour leads to a trapping and massive increase of particulate matter in the near-surface air to which people are exposed with severe health hazards.
WOS HeadingsScience & Technology
Indexed BySCI
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000415658600005
Citation statistics
Cited Times:57[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Urban Atmospher Environm, Xiamen 361021, Peoples R China
4.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA
5.Natl Univ Ireland Galway, Sch Phys, Galway, Ireland
6.Natl Univ Ireland Galway, Ctr Climate & Air Pollut Studies, Galway, Ireland
7.Beijing Weather Modificat Off, Beijing, Peoples R China
8.Max Planck Inst Chem, Multiphase Chem Dept, Mainz, Germany
9.Johannes Gutenberg Univ Mainz, Inst Inorgan & Analyt Chem, Duesbergweg 10-14, D-55128 Mainz, Germany
10.Univ Groningen, Energy & Sustainabil Res Inst Groningen, Ctr Isotope Res, Groningen, Netherlands
11.Aerodyne Res Inc, Billerica, MA USA
Recommended Citation
GB/T 7714
Tie, Xuexi,Huang, Ru-Jin,Cao, Junji,et al. Severe Pollution in China Amplified by Atmospheric Moisture[J]. SCIENTIFIC REPORTS,2017,7(1).
APA Tie, Xuexi.,Huang, Ru-Jin.,Cao, Junji.,Zhang, Qiang.,Cheng, Yafang.,...&O'Dowd, Colin D..(2017).Severe Pollution in China Amplified by Atmospheric Moisture.SCIENTIFIC REPORTS,7(1).
MLA Tie, Xuexi,et al."Severe Pollution in China Amplified by Atmospheric Moisture".SCIENTIFIC REPORTS 7.1(2017).
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