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@ARTICLE{Rosati:891840,
author = {Rosati, Bernadette and Paul, Andreas and Iversen, Emil Mark
and Massling, Andreas and Bilde, Merete},
title = {{R}econciling atmospheric water uptake by hydrate forming
salts},
journal = {Environmental science},
volume = {22},
number = {8},
issn = {2050-7895},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2021-01763},
pages = {1759 - 1767},
year = {2020},
abstract = {Magnesium and calcium chloride salts contribute to the
global atmospheric aerosol burden via emission of sea spray
and mineral dust. Their influence on aerosol hygroscopicity
and cloud forming potential is important but uncertain with
ambiguities between results reported in the literature. To
address this, we have conducted measurements of the
hygroscopic growth and critical supersaturation of dried,
size selected nano-particles made from aqueous solution
droplets of MgCl2 and CaCl2, respectively, and compare
experimentally derived values with results from
state-of-the-art thermodynamic modelling. It is
characteristic of both MgCl2 and CaCl2 salts that they bind
water in the form of hydrates under a range of ambient
conditions. We discuss how hydrate formation affects the
particles' water uptake and provide an expression for
hydrate correction factors needed in calculations of
hygroscopic growth factors, critical super-saturations, and
derived κ values of particles containing hydrate forming
salts. We demonstrate the importance of accounting for
hydrate forming salts when predicting hygroscopic properties
of sea spray aerosol.},
cin = {IEK-8},
ddc = {333.7},
cid = {I:(DE-Juel1)IEK-8-20101013},
pnm = {243 - Tropospheric trace substances and their
transformation processes (POF3-243)},
pid = {G:(DE-HGF)POF3-243},
typ = {PUB:(DE-HGF)16},
pubmed = {32697206},
UT = {WOS:000560533900012},
doi = {10.1039/D0EM00179A},
url = {https://juser.fz-juelich.de/record/891840},
}