SENSITIVITY OF THE OCEAN-ATMOSPHERE CARBON CYCLE TO ICE-COVERED AND ICE-FREE CONDITIONS IN THE NORDIC SEAS DURING THE LAST GLACIAL MAXIMUM
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dc.contributor.author | Schulz M. | |
dc.contributor.author | Paul A. | |
dc.date.accessioned | 2022-11-13T03:34:25Z | |
dc.date.available | 2022-11-13T03:34:25Z | |
dc.date.issued | 2004 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=31366388 | |
dc.identifier.citation | Palaeogeography, Palaeoclimatology, Palaeoecology, 2004, 207, 1-2, 127-141 | |
dc.identifier.issn | 0031-0182 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/39682 | |
dc.description.abstract | A global carbon-cycle box model forced by an ocean-general circulation model (OGCM) is used to investigate how different sea-surface reconstructions for the northern North Atlantic Ocean (Nordic Seas) for the Last Glacial Maximum (LGM) affect the ocean–atmosphere carbon cycle via changes in the large-scale thermohaline circulation. For perennial sea-ice cover in the Nordic Seas [CLIMAP, Chart Ser. (Geol. Soc. Am.) MC-36 (1981)], the model-predicted deep-water formation areas, δ13C distribution and 14C ventilation ages are partly inconsistent with palaeoceanographic data for the glacial Atlantic Ocean. Considering ice-free conditions during LGM summer in the Nordic Seas [Weinelt et al., Palaeoclimatology 1 (1996) 283] brings the model results in better agreement with palaeoceanographic findings, thus supporting this particular sea-surface reconstruction. For both LGM scenarios, the ocean circulation model simulates a reduction in the export of North Atlantic Deep Water (NADW) to the Southern Ocean by 50% compared to today. The effect of changes in the intensity of the thermohaline circulation on atmospheric CO2 content alone is rather small, accounting for approximately 20% of the net CO2 lowering during the LGM. | |
dc.subject | Thermohaline circulation | |
dc.subject | North Atlantic Deep Water | |
dc.subject | Carbon isotopes | |
dc.subject | Ventilation age | |
dc.subject | Ocean-general circulation model | |
dc.subject | Carbon-cycle model | |
dc.title | SENSITIVITY OF THE OCEAN-ATMOSPHERE CARBON CYCLE TO ICE-COVERED AND ICE-FREE CONDITIONS IN THE NORDIC SEAS DURING THE LAST GLACIAL MAXIMUM | |
dc.type | Статья |
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