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@ARTICLE{Pozzoli:60706,
author = {Pozzoli, L. and Bey, I. and Rast, S. and Schultz, M. G. and
Stier, P. and Feichter, J.},
title = {{T}race gas and aerosol intercations in the fully coupled
model of aerosol-chemistry-climate {ECHAM}5-{HAMMOZ}, {PART}
{II}: {I}mpact of heterogeneous chemistry on the global
aerosol distributions},
journal = {Journal of Geophysical Research},
volume = {113},
issn = {0148-0227},
address = {Washington, DC},
publisher = {Union},
reportid = {PreJuSER-60706},
pages = {D07309},
year = {2008},
note = {Record converted from VDB: 12.11.2012},
abstract = {We use the ECHAM5-HAMMOZ aerosol-chemistry-climate model to
quantify the influence of trace gas-aerosol interactions on
the regional and global distributions and optical properties
of aerosols for present-day conditions. The model includes
fully interactive simulations of gas phase and aerosol
chemistry including a comprehensive set of heterogeneous
reactions. We find that as a whole, the heterogeneous
reactions have only a small effect on the SO2 and sulfate
burden because of competing effects. The uptake of SO2 on
dust and sea salt decreases the SO2 concentrations while the
decrease in OH (that results from the uptake of HO2, N2O5,
and O-3) tends to increase SO2 (because of reduced
oxidation). The sulfate formed in sea salt aerosols from SO2
uptake accounts for 3.7 Tg(S) a(-1) $(5\%)$ of the total
sulfate production. Uptake and subsequent reaction of SO2 on
mineral dust contributes to a small formation of sulfate
(0.55 Tg(S) a(-1), $<1\%),$ but is responsible for the
coating of mineral dust particles, resulting in an extra 300
Tg a(-1) of dust being transferred from the insoluble to the
soluble mixed modes. The burden of dust in the insoluble
modes is reduced by $44\%,$ while the total burden is
reduced by $5\%$ as a result of enhanced wet deposition
efficiency. Changes in the sulfur cycle affect the H2SO4
concentrations and the condensation of H2SO4 on black
carbon. Accounting for heterogeneous reactions enhances the
global mean burden of hydrophobic black carbon particles by
$4\%.$ The changes in aerosol mixing state result only in a
small change in the global and annual aerosol optical depth
(AOD) and absorption optical depth (ABS), but have
significant implications on regional and seasonal scale. For
example, in the main polluted regions of the Northern
Hemisphere, AOD and ABS increase by $10-30\%$ and up to
$15\%,$ respectively, in winter.},
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:000255202300005},
doi = {10.1029/2007JD009008},
url = {https://juser.fz-juelich.de/record/60706},
}