CCN closure study: Effects of aerosol chemical composition and mixing state
Reads0
Chats0
TLDR
In this article, the effects of chemical composition (bulk and size resolved) and mixing state (internal and external) on CCN activity of aerosols were investigated during the winter season in Kanpur.Abstract:
This study presents a detailed cloud condensation nuclei (CCN) closure study that investigates the effects of chemical composition (bulk and size resolved) and mixing state (internal and external) on CCN activity of aerosols. Measurements of the chemical composition, aerosol size distribution, total number concentration, and CCN concentration at supersaturation (SS = 0.2–1.0%) were performed during the winter season in Kanpur, India. Among the two cases considered here, better closure results are obtained for case 1 (low total aerosol loading, 49.54 ± 26.42 μg m−3, and high O:C ratio, 0.61 ± 0.07) compared to case 2 (high total aerosol loading, 101.05 ± 18.73 μg m−3, and low O:C ratio, 0.42 ± 0.06), with a maximum reduction of 3–81% in CCN overprediction for all depleted SS values (0.18–0.60%). Including the assumption that less volatile oxidized organic aerosols represent the soluble organic fraction reduced the overprediction to at most 40% and 129% in the internal and external mixing scenarios, respectively. At higher depleted SS values (0.34–0.60%), size-resolved chemical composition with an internal mixing state performed well in CCN closure among all organic solubility scenarios. However, at a lower depleted SS value (0.18%), closure is found to be more sensitive to both the chemical composition and mixing state of aerosols. At higher SS values, information on the solubility of organics and size-resolved chemical composition is required for accurate CCN predictions, whereas at lower SS values, information on the mixing state in addition to the solubility of organics and size-resolved chemical composition is required. Overall, κtotal values are observed to be independent of the O:C ratio [κtotal = (0.36 ± 0.01) × O:C − (0.03 ± 0.01)] in the range of 0.2<O:C<0.81, which indicates that the variation in the chemical composition of aerosols is not well represented by the changes in the O:C ratio alone.read more
Citations
More filters
Journal ArticleDOI
Trace elements in ambient aerosols and size-resolved fog droplets: Trends, enrichment, and risk assessment
TL;DR: In this article , the effect of the PM and droplet size on trace elemental concentrations was analyzed for 12 trace elements: Ca, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, Zn, V.
Posted ContentDOI
Spatial heterogeneity of aerosol effect on liquid cloud microphysical properties in the warm season over Tibetan Plateau
TL;DR: In this article , the effect of aerosol on liquid cloud microphysical properties over the Tibetan Plateau during the warm season was investigated by employing aerosol index and cloud property parameters.
Journal ArticleDOI
Spatial Heterogeneity of Aerosol Effect on Liquid Cloud Microphysical Properties in the Warm Season Over Tibetan Plateau
Journal ArticleDOI
Cloud Condensation Nuclei Closure Study Using Airborne Measurements Over the Southern Great Plains
TL;DR: In this article , the authors conducted a field campaign to estimate cloud condensation nuclei (CCN) and found that the closure ratio was equal to one under two different aerosol mixing state assumptions: (a) all particles are composed of 100% organic particles and (b) particles are externally mixed and composed of pure sulfates, nitrates, and organic particles assuming hygroscopicity values for organic particles between 0.04 and 0.17.
Reconsideration of surface tension and phase state effects on CCN 1 activity based on the AFM measurement
Chun Xiong,Xueyan Chen,Binyu Kuang,Xiaolei Ding,Xiangyu Pei,Zhengning,Xu,Shikuan Yang,Huanzhen Hu,Zhibin Wang +9 more
TL;DR: In this paper , the authors investigated condensation nuclei activity of inorganic salt (sodium 16 chloride and ammonium sulfate) and dicarboxylic acid (including malonic acid, phenylmalonic acid (PhMA), succinic 17 acid (SA), phenylsuccinic acid(PhSA), adipic acid, pimelic acid (PA) and octanedioic acid(OA)) mixed particles with 18 varied organic volume fraction (OVF), and then directly determined their surface tension and phase state at high relative humidity (over 99.5%) by atomic force microscopy (AFM).
References
More filters
Journal ArticleDOI
Climate Forcing by Anthropogenic Aerosols
Robert J. Charlson,Stephen E. Schwartz,J. M. Hales,Robert D. Cess,James A. Coakley,James Hansen,D. J. Hofmann +6 more
TL;DR: The aerosol forcing has likely offset global greenhouse warming to a substantial degree, however, differences in geographical and seasonal distributions of these forcings preclude any simple compensation.
Journal ArticleDOI
The formation, properties and impact of secondary organic aerosol: current and emerging issues
Mattias Hallquist,John C. Wenger,Urs Baltensperger,Yinon Rudich,David Simpson,David Simpson,Magda Claeys,J. Dommen,Neil M. Donahue,Christian George,Christian George,Allen H. Goldstein,Jacqueline F. Hamilton,Hartmut Herrmann,Thorsten Hoffmann,Yoshiteru Iinuma,Myoseon Jang,Michael E. Jenkin,Jose L. Jimenez,Astrid Kiendler-Scharr,Willy Maenhaut,Gordon McFiggans,Th. F. Mentel,Anne Monod,André S. H. Prévôt,John H. Seinfeld,Jason D. Surratt,Rafal Szmigielski,Jürgen Wildt +28 more
TL;DR: In this article, an overview of the atmospheric degradation mechanisms for SOA precursors, gas-particle partitioning theory and analytical techniques used to determine the chemical composition of SOA is presented.
Journal ArticleDOI
Evolution of Organic Aerosols in the Atmosphere
Jose L. Jimenez,Manjula R. Canagaratna,Neil M. Donahue,André S. H. Prévôt,Qi Zhang,Jesse H. Kroll,Peter F. DeCarlo,James Allan,Hugh Coe,Nga L. Ng,Allison C. Aiken,Kenneth S. Docherty,Ingrid M. Ulbrich,Andrew P. Grieshop,Allen L. Robinson,Jonathan Duplissy,Jared D. Smith,Kevin R. Wilson,V. A. Lanz,Christoph Hueglin,Yele Sun,Yele Sun,Jian Tian,Ari Laaksonen,Tomi Raatikainen,Tomi Raatikainen,J. Rautiainen,Petri Vaattovaara,Mikael Ehn,Markku Kulmala,Markku Kulmala,Jason Tomlinson,Don R. Collins,Michael J. Cubison,Edward J. Dunlea,J. A. Huffman,Timothy B. Onasch,M. R. Alfarra,Paul I. Williams,Keith Bower,Yutaka Kondo,Johannes Schneider,Frank Drewnick,Stephan Borrmann,S. Weimer,Kenneth L. Demerjian,D. Salcedo,L. Cottrell,Robert J. Griffin,Akinori Takami,Takao Miyoshi,Shiro Hatakeyama,Akio Shimono,J. Y. Sun,Y. M. Zhang,Katja Dzepina,Joel R. Kimmel,Donna Sueper,J. T. Jayne,Scott C. Herndon,A. Trimborn,Leah R. Williams,Ezra C. Wood,Ann M. Middlebrook,Charles E. Kolb,Urs Baltensperger,Douglas R. Worsnop +66 more
TL;DR: A unifying model framework describing the atmospheric evolution of OA that is constrained by high–time-resolution measurements of its composition, volatility, and oxidation state is presented, which can serve as a basis for improving parameterizations in regional and global models.
Journal ArticleDOI
Organic aerosol and global climate modelling: a review
Maria Kanakidou,John H. Seinfeld,Spyros N. Pandis,Ian Barnes,Frank Dentener,Maria Cristina Facchini,R. Van Dingenen,Barbara Ervens,Athanasios Nenes,Claus J. Nielsen,Erik Swietlicki,J. P. Putaud,Yves Balkanski,Sandro Fuzzi,J. Horth,Geert K. Moortgat,R. Winterhalter,Cathrine Lund Myhre,Kostas Tsigaridis,Elisabetta Vignati,Euripides G. Stephanou,J. Wilson +21 more
TL;DR: In this article, the authors reviewed existing knowledge with regard to organic aerosol (OA) of importance for global climate modelling and defined critical gaps needed to reduce the involved uncertainties, and synthesized the information to provide a continuous analysis of the flow from the emitted material to the atmosphere up to the point of the climate impact of the produced organic aerosols.
Journal ArticleDOI
A single parameter representation of hygroscopic growth and cloud condensation nucleus activity
TL;DR: In this paper, a method to describe the relationship between particle dry diameter and cloud condensation activity using a single hygroscopicity parameter is presented. But this method is limited to single and multi-component particles with varying amounts of inorganic, organic and surface active compounds.
Related Papers (5)
A single parameter representation of hygroscopic growth and cloud condensation nucleus activity
Evolution of Organic Aerosols in the Atmosphere
Jose L. Jimenez,Manjula R. Canagaratna,Neil M. Donahue,André S. H. Prévôt,Qi Zhang,Jesse H. Kroll,Peter F. DeCarlo,James Allan,Hugh Coe,Nga L. Ng,Allison C. Aiken,Kenneth S. Docherty,Ingrid M. Ulbrich,Andrew P. Grieshop,Allen L. Robinson,Jonathan Duplissy,Jared D. Smith,Kevin R. Wilson,V. A. Lanz,Christoph Hueglin,Yele Sun,Yele Sun,Jian Tian,Ari Laaksonen,Tomi Raatikainen,Tomi Raatikainen,J. Rautiainen,Petri Vaattovaara,Mikael Ehn,Markku Kulmala,Markku Kulmala,Jason Tomlinson,Don R. Collins,Michael J. Cubison,Edward J. Dunlea,J. A. Huffman,Timothy B. Onasch,M. R. Alfarra,Paul I. Williams,Keith Bower,Yutaka Kondo,Johannes Schneider,Frank Drewnick,Stephan Borrmann,S. Weimer,Kenneth L. Demerjian,D. Salcedo,L. Cottrell,Robert J. Griffin,Akinori Takami,Takao Miyoshi,Shiro Hatakeyama,Akio Shimono,J. Y. Sun,Y. M. Zhang,Katja Dzepina,Joel R. Kimmel,Donna Sueper,J. T. Jayne,Scott C. Herndon,A. Trimborn,Leah R. Williams,Ezra C. Wood,Ann M. Middlebrook,Charles E. Kolb,Urs Baltensperger,Douglas R. Worsnop +66 more
The formation, properties and impact of secondary organic aerosol: current and emerging issues
Mattias Hallquist,John C. Wenger,Urs Baltensperger,Yinon Rudich,David Simpson,David Simpson,Magda Claeys,J. Dommen,Neil M. Donahue,Christian George,Christian George,Allen H. Goldstein,Jacqueline F. Hamilton,Hartmut Herrmann,Thorsten Hoffmann,Yoshiteru Iinuma,Myoseon Jang,Michael E. Jenkin,Jose L. Jimenez,Astrid Kiendler-Scharr,Willy Maenhaut,Gordon McFiggans,Th. F. Mentel,Anne Monod,André S. H. Prévôt,John H. Seinfeld,Jason D. Surratt,Rafal Szmigielski,Jürgen Wildt +28 more