| Autor: |
Aleksandr Montelli, Marina Solovyeva, Grigorii Akhmanov, Adriano Mazzini, Anna Piatilova, Elena Bakay, Julian A. Dowdeswell |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Quaternary Science Reviews. 303:107973 |
| ISSN: |
0277-3791 |
| DOI: |
10.1016/j.quascirev.2023.107973 |
| Popis: |
New high-resolution geophysical data acquired from eastern Storbanken in the central Barents Sea allow reconstruction of the flow of marine-based ice dome during the final stages of ice-sheet decay. Ice-marginal and subglacial landforms show diverging and quasi-radial grounding-line retreat patterns, implying that an isolated, dynamic, shrinking ice dome was centred at ∼77° N 40° E on eastern Storbanken prior to final marine-based ice-sheet collapse. This geomorphological reconstruction contrasts with previous numerical and observational models that infer a northward-migrating ice dome or crest that extended longitudinally from Svalbard to Franz-Josef Land prior to its eventual demise. Our results provide an important past analogue for late-stage decay of marine ice domes, as well as robust empirical constraints that can be used to calibrate numerical models simulating the behaviour of marine-based ice sheets in a warming environment. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect