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| Titel |
The importance of ice boundary conditions in GCMs |
| VerfasserIn |
Helene Ø. Muri, Myles Allen, Gideon Henderson, Paul J. Valdes, Tamsin Edwards, Tolu Aina, Milo Thurston, Sandy P. Harrison |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250040049
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| Zusammenfassung |
| Attempting to simulate climates substantially different from today offers an opportunity
not only to evaluate model skill but also a chance to test our understanding of the
fundamental mechanisms governing our climate. The importance of the role played by
boundary conditions in GCMs, in particular land ice, are explored in this study. The
period of focus is the mid-Holocene, i.e. ~6000 years before present (6kyBP),
when the climate was stable and the forcing on the climate well known. To date
the General Circulation Models (GCMs) have struggled to simulate the regional
climate of Eastern North America correctly. This is attempted to be rectified with this
experiment where new and improved local boundary conditions are implemented in an
ensemble of paleo-climate models. The remnants of the Laurentide ice sheet is
included and the Hudson Bay is somewhat expanded in the model. The ensemble
results are compared to geological evidence from the region. The Eastern North
American boundary condition experiment concludes that the perturbations brought
the climate models to a closer agreement with the geological records regionally. |
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