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@ARTICLE{Mhler:35996,
author = {Möhler, O. and Linke, C. and Saathoff, H. and Schnaiter,
M. and Wagner, R. and Mangold, A. and Krämer, M. and
Schurath, U.},
title = {{I}ce nucleation on flame soot aerosol of different organic
arbon content},
journal = {Meteorologische Zeitschrift},
volume = {14},
issn = {0941-2948},
address = {Stuttgart},
publisher = {E. Schweizerbart Science Publishers},
reportid = {PreJuSER-35996},
pages = {477 - 484},
year = {2005},
note = {Record converted from VDB: 12.11.2012},
abstract = {The aerosol chamber AIDA (Aerosol Interactions and Dynamics
in the Atmosphere) was used as a moderate expansion cloud
chamber to investigate the effect of the organic carbon (OC)
content on the ice nucleation properties of soot aerosol
particles. Two different soot samples with OC contents of
$16\%$ (CS16) and 40 $\%$ (CS40) where produced with the
CAST (Combustion Aerosol Standard) burner operated at
different air/fuel (propane) ratios. In dynamic expansion
experiments with about 30 $\%/min$ increase of relative
humidity with respect to ice, the CS16 sample started to
nucleate ice crystals at an ice saturation ratio S-in of
1.45 (at a temperature of 207 K). This value is very close
to the ice saturation ratio of ice nucleation onset on
carbon spark generator soot particles coated with a
significant amount of sulphuric acid investigated in
previous AIDA expansion experiments. A second experiment
with CS40 soot performed at almost identical thermodynamic
conditions showed ice nucleation onset to occur at S-in
between 1.5 and 1.7. The formation rate of ice crystals was
at least two orders of magnitude less than for CS16 soot,
even at ice saturation ratios up to values of 1.9, which is
very close to water saturation at a temperature of 207 K.
Therefore, increasing the amount of OC seems to
significantly suppress the ice nucleation on flame soot
particles. In contrast, similar expansion experiments with
dry and untreated mineral dust particles (Arizona test dust)
in the temperature range 194 to 241 K showed ice nucleation
to occur at much lower ice saturation ratios of only 1.05 to
1.15.},
keywords = {J (WoSType)},
cin = {ICG-I},
ddc = {550},
cid = {I:(DE-Juel1)VDB47},
pnm = {Chemie und Dynamik der Geo-Biosphäre},
pid = {G:(DE-Juel1)FUEK257},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000233148300006},
doi = {10.1127/0941-2948/2005/0055},
url = {https://juser.fz-juelich.de/record/35996},
}