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| Titel |
A new calibrated deglacial ice and meltwater drainage model for Eurasia |
| VerfasserIn |
L. Tarasov, W. R. Peltier, R. Gyllencreutz, Ø. Lohne, J. Mangerud, J.-I. Svensen |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250030869
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| Zusammenfassung |
| We present results for a new high-resolution
glaciologically-self-consistent deglacial history for the Eurasian ice
complex including iceberg/meltwater drainage components. The history
is derived from ongoing calibration of the MUN/UofT Glacial Systems
Model against a large set of Relative Sea Level data and against
margin chronologies inferred on the basis of glacial geology and
geomorphology (using the DATED GIS database, Gyllencreutz et al.,
2007). Results from PMIP II model runs are incorporated into the
climate forcing components. The Bayesian calibration provides a
posterior distribution for model parameters and thereby modelled
glacial histories given the observational data sets. Thus meaningful
error bars are obtained. Large differences with the current
non-glaciological ICE-5G model highlight the important role of ice
dynamics, climatological constraints, and objective model calibration
in constraining past deglaciation. The derived chronologies will
provide a starting point for data-model comparison within the INQUA
sponsored Meltwater routing and Ocean-Cryosphere-Atmosphere response
(MOCA) project. They are also offered as a set of boundary conditions
and freshwater forcings for the PMIP transient project. |
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