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Carbenium ion-mediated oligomerization of methylglyoxal for secondary organic aerosol formation 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (24) : 13294-13299
作者:  Ji, Yuemen;  Shi, Qiuju;  Li, Yixin;  An, Taicheng;  Zheng, Jun;  Peng, Jianfei;  Gao, Yanpeng;  Chen, Jiangyao;  Li, Guiying;  Wang, Yuan;  Zhang, Fang;  Zhang, Annie L.;  Zhao, Jiayun;  Molina, Mario J.;  Zhang, Renyi
收藏  |  浏览/下载:15/0  |  提交时间:2020/06/09
secondary organic aerosol  aqueous  oligomerization  brown carbon  cationic  
Rapid growth of new atmospheric particles by nitric acid and ammonia condensation 期刊论文
NATURE, 2020, 581 (7807) : 184-+
作者:  Liang, Guanxiang;  Zhao, Chunyu;  Zhang, Huanjia;  Mattei, Lisa;  Sherrill-Mix, Scott;  Bittinger, Kyle;  Kessler, Lyanna R.;  Wu, Gary D.;  Baldassano, Robert N.;  DeRusso, Patricia;  Ford, Eileen;  Elovitz, Michal A.;  Kelly, Matthew S.;  Patel, Mohamed Z.;  Mazhani, Tiny;  Gerber, Jeffrey S.;  Kelly, Andrea;  Zemel, Babette S.;  Bushman, Frederic D.
收藏  |  浏览/下载:17/0  |  提交时间:2020/05/20

A list of authors and their affiliations appears at the end of the paper New-particle formation is a major contributor to urban smog(1,2), but how it occurs in cities is often puzzling(3). If the growth rates of urban particles are similar to those found in cleaner environments (1-10 nanometres per hour), then existing understanding suggests that new urban particles should be rapidly scavenged by the high concentration of pre-existing particles. Here we show, through experiments performed under atmospheric conditions in the CLOUD chamber at CERN, that below about +5 degrees Celsius, nitric acid and ammonia vapours can condense onto freshly nucleated particles as small as a few nanometres in diameter. Moreover, when it is cold enough (below -15 degrees Celsius), nitric acid and ammonia can nucleate directly through an acid-base stabilization mechanism to form ammonium nitrate particles. Given that these vapours are often one thousand times more abundant than sulfuric acid, the resulting particle growth rates can be extremely high, reaching well above 100 nanometres per hour. However, these high growth rates require the gas-particle ammonium nitrate system to be out of equilibrium in order to sustain gas-phase supersaturations. In view of the strong temperature dependence that we measure for the gas-phase supersaturations, we expect such transient conditions to occur in inhomogeneous urban settings, especially in wintertime, driven by vertical mixing and by strong local sources such as traffic. Even though rapid growth from nitric acid and ammonia condensation may last for only a few minutes, it is nonetheless fast enough to shepherd freshly nucleated particles through the smallest size range where they are most vulnerable to scavenging loss, thus greatly increasing their survival probability. We also expect nitric acid and ammonia nucleation and rapid growth to be important in the relatively clean and cold upper free troposphere, where ammonia can be convected from the continental boundary layer and nitric acid is abundant from electrical storms(4,5).


  
Radiative absorption enhancements by black carbon controlled by particle-to-particle heterogeneity in composition 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (10) : 5196-5203
作者:  Fierce, Laura;  Onasch, Timothy B.;  Cappa, Christopher D.;  Mazzoleni, Claudio;  China, Swarup;  Bhandari, Janarjan;  Davidovits, Paul;  Al Fischer, D.;  Helgestad, Taylor;  Lambe, Andrew T.;  Sedlacek, Arthur J., III;  Smith, Geoffrey D.;  Wolff, Lindsay
收藏  |  浏览/下载:8/0  |  提交时间:2020/05/13
black carbon  direct radiative forcing  absorption enhancement  aerosol mixing state  
Secondary organic aerosol reduced by mixture of atmospheric vapours 期刊论文
NATURE, 2019, 565 (7741) : 587-593
作者:  McFiggans, Gordon;  Mentel, Thomas F.;  Wildt, Juergen;  Pullinen, Iida;  Kang, Sungah;  Kleist, Einhard;  Schmitt, Sebastian;  Springer, Monika;  Tillmann, Ralf;  Wu, Cheng;  Zhao, Defeng;  Hallquist, Mattias;  Faxon, Cameron;  Le Breton, Michael;  Hallquist, Asa M.;  Simpson, David;  Bergstrom, Robert;  Jenkin, Michael E.;  Ehn, Mikael;  Thornton, Joel A.;  Alfarra, M. Rami;  Bannan, Thomas J.;  Percival, Carl J.;  Priestley, Michael;  Topping, David;  Kiendler-Scharr, Astrid
收藏  |  浏览/下载:12/0  |  提交时间:2019/11/27
Multiphase reactivity of polycyclic aromatic hydrocarbons is driven by phase separation and diffusion limitations 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (24) : 11658-11663
作者:  Zhou, Shouming;  Hwang, Brian C. H.;  Lakey, Pascale S. J.;  Zuend, Andreas;  Abbatt, Jonathan P. D.;  Shiraiwa, Manabu
收藏  |  浏览/下载:9/0  |  提交时间:2019/11/27
phase state  ozone  indoor chemistry  bulk diffusion  kinetic modeling  
Factors driving the seasonal and hourly variability of sea-spray aerosol number in the North Atlantic 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (41) : 20309-20314
作者:  Saliba, Georges;  Chen, Chia-Li;  Lewis, Savannah;  Russell, Lynn M.;  Rivellini, Laura-Helena;  Lee, Alex K. Y.;  Quinn, Patricia K.;  Bates, Timothy S.;  Haentjens, Nils;  Boss, Emmanuel S.;  Karp-Boss, Lee;  Baetge, Nicholas;  Carlson, Craig A.;  Behrenfeld, Michael J.
收藏  |  浏览/下载:8/0  |  提交时间:2019/11/27
NAAMES  sea spray aerosol  phytoplankton bloom  radiative impacts  
Anthropogenic drivers of 2013-2017 trends in summer surface ozone in China 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (2) : 422-427
作者:  Li, Ke;  Jacob, Daniel J.;  Liao, Hong;  Shen, Lu;  Zhang, Qiang;  Bates, Kelvin H.
收藏  |  浏览/下载:48/0  |  提交时间:2019/11/27
surface ozone  China  aerosol chemistry  emission reductions  air quality  
Anthropogenic enhancements to production of highly oxygenated molecules from autoxidation 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (14) : 6641-6646
作者:  Pye, Havala O. T.;  39;Ambro, Emma L.
收藏  |  浏览/下载:8/0  |  提交时间:2019/11/27
autoxidation  SOA  monoterpenes  PM2.5  aerosol  
Spherical tarball particles form through rapid chemical and physical changes of organic matter in biomass-burning smoke 期刊论文
Proceedings of the National Academy of Sciences of the United States of America, 2019, 116 (39) : 19336-19341
作者:  Kouji Adachi;  Arthur J. Sedlacek III;  Lawrence Kleinman;  Stephen R. Springston;  Jian Wang;  Duli Chand;  John M. Hubbe;  John E. Shilling;  Timothy B. Onasch;  Takeshi Kinase;  Kohei Sakata;  Yoshio Takahashi;  and Peter R. Buseck
收藏  |  浏览/下载:10/0  |  提交时间:2020/04/16
tarball  biomass burning  climate change  organic aerosol  transmission electron microscopy  
Smoke radiocarbon measurements from Indonesian fires provide evidence for burning of millennia-aged peat 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (49) : 12419-12424
作者:  Wiggins, Elizabeth B.;  Czimczik, Claudia I.;  Santos, Guaciara M.;  Chen, Yang;  Xu, Xiaomei;  Holden, Sandra R.;  Randerson, James T.;  Harvey, Charles F.;  Kai, Fuu Ming;  Yu, Liya E.
收藏  |  浏览/下载:23/0  |  提交时间:2019/11/27
tropical peatlands  global carbon cycle  human health  isotope  land cover change