Thermomechanical behaviour of the Laurentide Ice Sheet: from analytical advances to a modelling approach
The Laurentide Ice Sheet (LIS) was the largest of the former Northern Hemisphere ice sheets during the Last Glacial Maximum (LGM, 21,000 years before present). Nevertheless, there are large uncertainties regarding the behaviour of the LIS and its main features such as maximum elevation, total volume...
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| Formato: | tesis doctoral |
| Fecha de publicación: | 2025 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/118400 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/118400 |
| Access Level: | acceso abierto |
| Palavra-chave: | 551.324(043.2) Manto de Hielo Laurentino Laurentide Ice Sheet Geofísica 2507 Geofísica 2502.05 Paleoclimatología |
| Resumo: | The Laurentide Ice Sheet (LIS) was the largest of the former Northern Hemisphere ice sheets during the Last Glacial Maximum (LGM, 21,000 years before present). Nevertheless, there are large uncertainties regarding the behaviour of the LIS and its main features such as maximum elevation, total volume and extent among others. Moreover, North Atlantic sediment cores contain quasi-periodic layers with extremely high percentages of lithic fragments during glacial periods. Our current explanation for the presence of such layers considers that the sediments were captured by the ice, transported from the Northern Hemisphere ice sheets and eventually unloaded onto the seafloor when the enclosing ice melted. The ultimate physical explanation underlying any oscillatory mechanism that causes the Heinrich Events (HEs) is still under debate... |
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