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| Titel |
Semi-Lagrangian transport of oxygen isotopes in polythermal ice sheets: implementation and first results |
| VerfasserIn |
T. Goelles, K. Grosfeld, G. Lohmann |
| 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 ; 7, no. 4 ; Nr. 7, no. 4 (2014-07-11), S.1395-1408 |
| Datensatznummer |
250115659
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| Publikation (Nr.) |
 copernicus.org/gmd-7-1395-2014.pdf |
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| Zusammenfassung |
| Modelling the evolution of the Earth system on long timescales
requires the knowledge and understanding of driving mechanisms, such
as the hydrological cycle. This is dominant in all components of the
Earth's system, such as atmosphere, ocean, land surfaces/vegetation
and the cryosphere. Observations and measurements of stable water
isotopes in climate archives can help to decipher and reconstruct
climate change and its regional variations. For the cryosphere, the
δ18O cycle in the current generation of
Earth system models is missing and an efficient and accurate tracer
transport scheme is required. We describe ISOPOLIS 1.0, a modular
semi-Lagrangian transport scheme of second-order accuracy, which is
coupled to the polythermal and thermomechanical ice sheet model
SICOPOLIS (version 2.9). Model skill is demonstrated by experiments
with a simplified ice sheet geometry and by comparisons of simulated
ice cores with data from Greenland (GRIP) and Antarctica (Vostok).
The presented method is a valuable tool to investigate the transport
of any kind of passive tracer inside the cold ice part of a polythermal ice sheet and is
an important step to model the whole δ18O cycle. |
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