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@ARTICLE{Dinar:52885,
author = {Dinar, E. and Taraniuk, I. and Graber, E. R. and Anttila,
T. and Mentel, T. F. and Rudich, Y.},
title = {{H}ygroscopic growth of atmospheric and model humic-like
substances},
journal = {Journal of Geophysical Research},
volume = {112},
issn = {0148-0227},
address = {Washington, DC},
publisher = {Union},
reportid = {PreJuSER-52885},
pages = {D05211},
year = {2007},
note = {Record converted from VDB: 12.11.2012},
abstract = {The hygroscopic growth (HG) of humic-like substances
(HULIS) extracted from smoke and pollution aerosol particles
and of Suwannee River fulvic acid (SRFA, bulk and fractions
of different molecular weight) was measured by humidity
tandem differential mobility analyzer (H-TDMA). By
characterizing physical and chemical parameters such as
molecular weight, elemental composition, and surface
tension, we test the effect of these parameters on particle
interactions with water vapor. For molecular
weight-fractionated SRFA fractions, the growth factor at
$90\%$ relative humidity was generally inversely
proportional to the molecular weight. HULIS extracts from
ambient particles are more hygroscopic than all the SRFA
fractions and exhibit different hygroscopic properties
depending on their origin and residence time in the
atmosphere. The results point out some dissimilarities
between SRFA and aerosol- derived HULIS. The cloud
condensation nuclei (CCN) behavior of the studied materials
was predicted on the basis of hygroscopic growth using a
recently introduced approach of Kreidenweis et al. (2005)
and compared to CCN activity measurements on the same
samples (Dinar et al., 2006). It is found that the
computational approach (Kreidenweis et al., 2005) works
reasonably well for SRFA fractions but is limited in use for
the HULIS extracts from aerosol particles. The difficulties
arise from uncertainties associated with HG measurements at
high relative humidity, which leads to large errors in the
predicted CCN activity.},
keywords = {J (WoSType)},
cin = {ICG-2},
ddc = {550},
cid = {I:(DE-Juel1)VDB791},
pnm = {Atmosphäre und Klima},
pid = {G:(DE-Juel1)FUEK406},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000245017000002},
doi = {10.1029/2006JD007442},
url = {https://juser.fz-juelich.de/record/52885},
}