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@ARTICLE{Kerminen:42719,
author = {Kerminen, V.-M. and Lehtinen, K. E. J. and Anttila, T. and
Kulmala, M.},
title = {{D}ynamics of atmospheric nucleation mode particles: {A}
time scale analysis},
journal = {Tellus / B},
volume = {56},
issn = {0280-6509},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {PreJuSER-42719},
pages = {135 - 146},
year = {2004},
note = {Record converted from VDB: 12.11.2012},
abstract = {A theoretical framework was constructed by which one can
estimate the relative role of different processes in
thedynamics of atmospheric nucleation mode particles. The
framework relies on 14 timescales that describe (1) changes
inthe total nuclei number concentration, (2) changes in the
mean diameter of the nucleation mode and (3)
concentrationsof low-volatile vapours responsible for the
growth of nuclei. The magnitude of the derived timescales
can be calculatedrelatively easily from the available
measurement or modelling data. Application to the
lower-troposphere revealed thatunder most conditions removal
of nuclei is dominated by their coagulation with larger
background particles and thatthis process competes very
strongly with growth of nuclei to sizes relevant to
atmospheric chemistry and physics.Withsome exceptions,
self-coagulation of nuclei was shown to be of marginal
importance compared with their growth bycondensation and
their removal by coagulation. Finally, by comparing
predictions based on relevant timescales withthose obtained
from detailed numerical simulations, quantitative criteria
were derived concerning (1) when one mayneglect
self-coagulation of nuclei when looking at nucleation mode
dynamics and (2) when the whole nucleation modecan be
neglected because of its eventual removal. These criteria
are extremely useful for atmospheric modellers whoneed to
simplify their models as much as possible. From the
modelling point of view, other processes requiring
furtherattention are the introduction of new nuclei into the
system and decrease in nuclei number concentration due to
dilutionof the air.},
cin = {ICG-II},
ddc = {550},
cid = {I:(DE-Juel1)VDB48},
pnm = {Chemie und Dynamik der Geo-Biosphäre},
pid = {G:(DE-Juel1)FUEK257},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000220696500005},
doi = {10.1111/j.1600-0889.2004.00095.x},
url = {https://juser.fz-juelich.de/record/42719},
}