scholarly journals Cloud condensation nucleus activity of secondary organic aerosol particles mixed with sulfate

2007 ◽  
Vol 34 (24) ◽  
Author(s):  
Stephanie M. King ◽  
Thomas Rosenoern ◽  
John E. Shilling ◽  
Qi Chen ◽  
Scot T. Martin
Keyword(s):  
Secondary Organic Aerosol ◽  
Aerosol Particles ◽  
Condensation Nucleus ◽  
Organic Aerosol ◽  
Cloud Condensation Nucleus

Experimental determination of chemical diffusion within secondary organic aerosol particles

2013 ◽  
Vol 15 (8) ◽  
pp. 2983 ◽  
Author(s):  
Evan Abramson ◽  
Dan Imre ◽  
Josef Beránek ◽  
Jacqueline Wilson ◽  
Alla Zelenyuk
Keyword(s):  
Experimental Determination ◽  
Secondary Organic Aerosol ◽  
Aerosol Particles ◽  
Chemical Diffusion ◽  
Organic Aerosol

scholarly journals Widening the gap between measurement and modelling of secondary organic aerosol properties?

2010 ◽  
Vol 10 (6) ◽  
pp. 2577-2593 ◽  
Author(s):  
N. Good ◽  
D. O. Topping ◽  
J. Duplissy ◽  
M. Gysel ◽  
N. K. Meyer ◽  
...  
Keyword(s):  
Surface Tension ◽  
Water Activity ◽  
Condensation Nucleus ◽  
Organic Aerosol ◽  
Solute Concentration ◽  
Complex Model ◽  
Cloud Condensation Nucleus ◽  
Saturated Water ◽  
Cloud Activation ◽  
Ccn Activity

Abstract. The link between measured sub-saturated hygroscopicity and cloud activation potential of secondary organic aerosol particles produced by the chamber photo-oxidation of α-pinene in the presence or absence of ammonium sulphate seed aerosol was investigated using two models of varying complexity. A simple single hygroscopicity parameter model and a more complex model (incorporating surface effects) were used to assess the detail required to predict the cloud condensation nucleus (CCN) activity from the sub-saturated water uptake. Sub-saturated water uptake measured by three hygroscopicity tandem differential mobility analyser (HTDMA) instruments was used to determine the water activity for use in the models. The predicted CCN activity was compared to the measured CCN activation potential using a continuous flow CCN counter. Reconciliation using the more complex model formulation with measured cloud activation could be achieved widely different assumed surface tension behavior of the growing droplet; this was entirely determined by the instrument used as the source of water activity data. This unreliable derivation of the water activity as a function of solute concentration from sub-saturated hygroscopicity data indicates a limitation in the use of such data in predicting cloud condensation nucleus behavior of particles with a significant organic fraction. Similarly, the ability of the simpler single parameter model to predict cloud activation behaviour was dependent on the instrument used to measure sub-saturated hygroscopicity and the relative humidity used to provide the model input. However, agreement was observed for inorganic salt solution particles, which were measured by all instruments in agreement with theory. The difference in HTDMA data from validated and extensively used instruments means that it cannot be stated with certainty the detail required to predict the CCN activity from sub-saturated hygroscopicity. In order to narrow the gap between measurements of hygroscopic growth and CCN activity the processes involved must be understood and the instrumentation extensively quality assured. It is impossible to say from the results presented here due to the differences in HTDMA data whether: i) Surface tension suppression occurs ii) Bulk to surface partitioning is important iii) The water activity coefficient changes significantly as a function of the solute concentration.

Hygroscopicity and cloud condensation nucleus activity of marine aerosol particles over the western North Pacific

2011 ◽  
Vol 116 (D6) ◽  
Author(s):  
Michihiro Mochida ◽  
Chiharu Nishita-Hara ◽  
Hiroshi Furutani ◽  
Yuzo Miyazaki ◽  
Jinyoung Jung ◽  
...  
Keyword(s):  
North Pacific ◽  
Western North Pacific ◽  
Aerosol Particles ◽  
Condensation Nucleus ◽  
Cloud Condensation Nucleus ◽  
Marine Aerosol

Carbon in southeastern U.S. aerosol particles: Empirical estimates of secondary organic aerosol formation

2008 ◽  
Vol 42 (27) ◽  
pp. 6710-6720 ◽  
Author(s):  
Charles L. Blanchard ◽  
George M. Hidy ◽  
Shelley Tanenbaum ◽  
Eric Edgerton ◽  
Benjamin Hartsell ◽  
...  
Keyword(s):  
Secondary Organic Aerosol ◽  
Aerosol Particles ◽  
Organic Aerosol ◽  
Aerosol Formation ◽  
Empirical Estimates ◽  
Secondary Organic Aerosol Formation
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