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| Titel |
Description and evaluation of GLOMAP-mode: a modal global aerosol microphysics model for the UKCA composition-climate model |
| VerfasserIn |
G. W. Mann, K. S. Carslaw, D. V. Spracklen, D. A. Ridley, P. T. Manktelow, M. P. Chipperfield, S. J. Pickering, C. E. Johnson |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 3, no. 2 ; Nr. 3, no. 2 (2010-10-13), S.519-551 |
| Datensatznummer |
250000954
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| Publikation (Nr.) |
 copernicus.org/gmd-3-519-2010.pdf |
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| Zusammenfassung |
| A new version of the Global Model of Aerosol Processes (GLOMAP) is described,
which uses a two-moment pseudo-modal aerosol dynamics approach rather than the original
two-moment bin scheme. GLOMAP-mode simulates the multi-component global
aerosol, resolving sulfate, sea-salt, dust, black carbon (BC) and
particulate organic matter (POM), the latter including primary and biogenic
secondary POM. Aerosol processes are simulated in a size-resolved manner
including primary emissions, secondary particle formation by binary
homogeneous nucleation of sulfuric acid and water, particle growth by
coagulation, condensation and cloud-processing and removal by dry deposition,
in-cloud and below-cloud scavenging. A series of benchmark observational
datasets are assembled against which the skill of the model is assessed in
terms of normalised mean bias (b) and correlation coefficient (R).
Overall, the model performs well against the datasets in simulating
concentrations of aerosol precursor gases, chemically speciated particle
mass, condensation nuclei (CN) and cloud condensation nuclei (CCN). Surface
sulfate, sea-salt and dust mass concentrations are all captured well, while
BC and POM are biased low (but correlate well). Surface CN concentrations
compare reasonably well in free troposphere and marine sites, but are
underestimated at continental and coastal sites related to underestimation of
either primary particle emissions or new particle formation. The model
compares well against a compilation of CCN observations covering a range of
environments and against vertical profiles of size-resolved particle
concentrations over Europe. The simulated global burden, lifetime and wet
removal of each of the simulated aerosol components is also examined and each
lies close to multi-model medians from the AEROCOM model intercomparison
exercise. |
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