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| Titel |
Ocean circulation under snowball earth conditions |
| VerfasserIn |
Y. Ashkenazy, H. Gildor, M. Losch, D. Schrag, E. Tziperman |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250068726
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| Zusammenfassung |
| The dynamics of ocean circulation under Snowball conditions
is still largely unexplored. Here we study oceanic circulation under
a complete ice cover using the MIT oceanic general circulation model.
We use idealized aqua-planet conditions with meridionally variable sea
glacier depth and surface temperature, and spatially constant
geothermal heating. We examine convection and meridional circulation
developing due to brine rejection associated with ice production and
freezing temperature variations, due to the dependence of freezing
temperature on pressure and thus on the ice thickness. We show that
variable freezing temperature and salinity have a crucial role on
ocean circulation. These two factors may therefore have a significant
effect on sea glacier dynamics as the heat flux at the bottom of the
ice, and hence ice melting, is strongly affected by ocean circulation. |
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