World Library  

QR link for Studies of Propane Flame Soot Acting as Heterogeneous Ice Nuclei in Conjunction with Single Particle Soot Photometer Measurements : Volume 11, Issue 4 (08/04/2011)
Add to Book Shelf
Flag as Inappropriate
Email this Book

Studies of Propane Flame Soot Acting as Heterogeneous Ice Nuclei in Conjunction with Single Particle Soot Photometer Measurements : Volume 11, Issue 4 (08/04/2011)

By Crawford, I.

Click here to view

Book Id: WPLBN0003975128
Format Type: PDF Article :
File Size: Pages 32
Reproduction Date: 2015

Title: Studies of Propane Flame Soot Acting as Heterogeneous Ice Nuclei in Conjunction with Single Particle Soot Photometer Measurements : Volume 11, Issue 4 (08/04/2011)  
Author: Crawford, I.
Volume: Vol. 11, Issue 4
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Crawford, I., Flynn, M., Connolly, P. J., Saathoff, H., Möhler, O., Liu, D.,...Gallagher, M. W. (2011). Studies of Propane Flame Soot Acting as Heterogeneous Ice Nuclei in Conjunction with Single Particle Soot Photometer Measurements : Volume 11, Issue 4 (08/04/2011). Retrieved from

Description: Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Sciences, University of Manchester, M13 9PL, Manchester, UK. The ice nucleation efficiency of propane flame soot particles with and without a sulphuric acid coating was investigated using the aerosol and cloud chamber facility AIDA (Aerosol Interaction and Dynamics in the Atmosphere). The test soot for cloud formation simulations was produced using a propane flame Combustion Aerosol Standard generator (CAST, Jing-CAST Technologies). The organic carbon content (OC) of the test soot was altered in a reproducible fashion by changing the fuel/air mixture of the generator. The soot content of ice nuclei was subsequently investigated using a combination of a pumped counterflow virtual impactor (PCVI) to separate and evaporate the ice crystals, and a DMT single particle soot photometer (SP2) to examine the mixing state of the BC containing ice residuals.

Ice nucleation was found to be most efficient for uncoated soot of low organic carbon content (~5% organic carbon content) where deposition freezing occurred at an ice saturation ratio Sice~1.22 at a temperature T = 226.6 K with 25% of the test soot becoming active as ice nuclei. Propane flame soot of higher organic carbon content (~30% and ~70% organic carbon content) showed significantly lower ice nucleation efficiency (an activated fraction of the order of a few percent in the experiments) than the low organic carbon content soot, with water saturation being required for freezing to occur. Ice nucleation occurred over the range Sice = 1.22–1.70, and T = 223.2–226.6 K. Analysis of the SP2 data showed that the 5% organic carbon content soot had an undetectable OC coating whereas the 30% organic carbon content soot had a thicker or less volatile OC coating.

The application of a sulphuric acid coating to the flame soot shifted the threshold of the onset of freezing towards that of the homogeneous freezing of sulphuric acid; for the minimum OC flame soot this inhibited nucleation since the onset of freezing occurred at colder temperatures and required a greater ice saturation ratio; for the medium and maximum OC flame soot, the addition of a sulphuric acid significantly reduced the freezing threshold.

Studies of propane flame soot acting as heterogeneous ice nuclei in conjunction with single particle soot photometer measurements

Baumgardner, D., Subramanian, R., Twohy, C., Stith, J., and Kok, G.: Scavenging of black carbon by ice crystals over the northern Pacific, Geophys. Res. Lett., 35, D04204, doi:10.1029/2005JD006627, 2008.; Benz, S., Megahed, K., Möhler, O., Saathoff, H., Wagner, R., and Schurath, U.: T-dependent rate measurements of homogeneous ice nucleation in cloud droplets using a large atmospheric simulation chamber, J. Photochem. Photobiol. A: Chemistry, 176, 208–217, 2005.; Bond, T. and Bergstrom, R.: Light Absorption by Carbonaceous Particles: An Investigative Review, Aerosol Sci. Technol., 40, 27–67, doi:10.1080/02786820500421521, 2006.; Boulter, J., Cziczo, D., Middlebrook, A., Thomson, D., and Murphy, D.: Design and Performance of a Pumped Counterflow Virtual Impactor, Aerosol Sci. Technol., 40, 969–976, 2006.; Connolly, P. J., Flynn, M. J., Ulanowski, Z., Choularton, T. W., Gallagher, M. W., and Bower, K. N.: Calibration of the Cloud Particle Imager Probes Using Calibration Beads and Ice Crystal Analogs: The Depth of Field, J. Atmos. Ocean. Technol., 24, 1860–1879, 2007.; Connolly, P. J., Möhler, O., Field, P. R., Saathoff, H., Burgess, R., Choularton, T., and Gallagher, M.: Studies of heterogeneous freezing by three different desert dust samples, Atmos. Chem. Phys., 9, 2805–2824, doi:10.5194/acp-9-2805-2009, 2009.; DeMott, P.: An Exploratory Study of Ice Nucleation by Soot Aerosols, J. Appl. Meteorol., 29, 1072–1079, 1990.; DeMott, P. J., Rogers, D. C., and Kreidenweis, S. M.: The susceptibility of ice formation in upper tropospheric clouds to insoluble aerosol components, J. Geophys. Res. Atmos., 102, 19575–19584, 1997.; DeMott, P. J., Rogers, D. C., Kreidenweis, S. M., Chen, Y., Twohy, C. H., Baumgardner, D., Heymsfield, A. J., and Chan, K. R.: The role of heterogeneous freezing nucleation in upper tropospheric clouds: Inferences from SUCCESS, Geophys. Res. Lett., 25, 1387, doi:10.1029/97GL03779, 1998.; DeMott, P., Chen, Y., Kreidenweis, S., Rogers, D., and Sherman, D.: Ice formation by black carbon particles, J. Geophys. Res. Lett., 26, 2429–2432, 1999.; Archuleta, C. M., DeMott, P. J., and Kreidenweis, S. M.: Ice nucleation by surrogates for atmospheric mineral dust and mineral dust/sulfate particles at cirrus temperatures, Atmos. Chem. Phys., 5, 2617–2634, doi:10.5194/acp-5-2617-2005, 2005.; Baumgardner, D., Kok, G., and Raga, G.: Warming of the Arctic lower stratosphere by light absorbing particles, Geophys. Res. Lett., 31, L06117, doi:10.1029/2003GL018883, 2004.; Diehl, K. and Mitra, S. K.: A laboratory study of the effects of a kerosene-burner exhaust on ice nucleation and the evaporation rate of ice crystals, Atmos. Environ., 32, 3145–3151, 1998.; Dymarska, M., Murray, B., Sun, L., Eastwood, M., Knopf, D., and Bertram, A.: Deposition ice nucleation on soot at temperatures relevant for the lower troposphere, J. Geophys. Res., 111, D04204, doi:10.1029/2005JD006627, 2006.; Ebert, V., Teichert, H., Giesemann, C., Saathoff, H., and Schurath, U.: Fiber-coupled in-situ laser absorption spectrometer for the selective detection of water vapour traces down to the ppb-level, Tech. Mess., 72, 23–30, 2005.; Fahey, D., Gao, R. S., and Moehler, O.: Summary of the AquaVIT Water Vapour Intercomparison: Static Experiments, available online at:, 2009.; Field, P., Cotton, R. J., Johnson, D., Noone, K., Glantz, P., Kaye, P. H., Hirst, E., Greenaway, R. S., Jost, C., Gab


Click To View

Additional Books

  • On Interpreting Studies of Tracer Transp... (by )
  • Ozone Trends Derived from the Total Colu... (by )
  • Modeling Cosmogenic Radionuclides 10Be a... (by )
  • Ice Nucleation and Cloud Microphysical P... (by )
  • An Estimation of the 18O / 16O Ratio of ... (by )
  • On the Structure of the Extra-tropical T... (by )
  • Oh and Ho2 Chemistry During Namblex: Rol... (by )
  • Modelling Study of the Impact of Deep Co... (by )
  • Past and Future Simulations of No2 from ... (by )
  • Reevaluation of Mineral Aerosol Radiativ... (by )
  • Spatial Variation of Aerosol Properties ... (by )
  • Systematic Analysis of Interannual and S... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.