This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1029/2009JD012635 in citations.
Please use the identifier: http://hdl.handle.net/2128/20482 in citations.
Morphological characterization of soot aerosol particles during LACIS Experiment in November (LExNo)
Morphological characterization of soot aerosol particles during LACIS Experiment in November (LExNo)
Combined mobility and aerodynamic measurements were used to characterize the morphology of soot particles in an experimental campaign on the hygroscopic growth and activation of an artificial biomass burning aerosol. A custom-made, single-stage low-pressure impactor and two aerosol mass spectrometer...
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Personal Name(s): | Kiselev, A. |
---|---|
Wennrich, C. / Stratmann, F. / Wex, H. / Henning, S. / Mentel, T. F. / Kiendler-Scharr, A. / Schneider, J. / Walter, S. / Lieberwirth, I. | |
Contributing Institute: |
Troposphäre; ICG-2 JARA-ENERGY; JARA-ENERGY |
Published in: | Journal of Geophysical Research Journal of geophysical research / Atmospheres, 115 (2010) S. D11204 |
Imprint: |
Washington, DC
Union
2010
|
Physical Description: |
D11204 |
DOI: |
10.1029/2009JD012635 |
Document Type: |
Journal Article |
Research Program: |
Atmosphäre und Klima |
Series Title: |
Journal of Geophysical Research D: Atmospheres
115 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/20482 in citations.
Combined mobility and aerodynamic measurements were used to characterize the morphology of soot particles in an experimental campaign on the hygroscopic growth and activation of an artificial biomass burning aerosol. A custom-made, single-stage low-pressure impactor and two aerosol mass spectrometers (AMS) operating in the free molecular regime were used to measure the vacuum aerodynamic diameter of mobility-selected artificial soot particles that were produced in a spark discharge generator and then modified by condensation of ammonium hydrogen sulfate or levoglucosan as a coating to change their hydroscopic activity. Transmission electron microscope images revealed a relationship between the electrical mobility diameter and the diameter of the enveloping sphere, thus enabling evaluation of the effective density of soot agglomerates. A fractal description of the morphology of the soot aggregates allowed for evaluation of the average mass of the hygroscopic material per particle. The average mass of the hygroscopic material per particle was also measured directly with the two AMS instruments, and the agreement between the two methods was found satisfactory. This tandem approach allows detection of small changes in the particle effective density and morphology caused by condensation of organic material. |