Meltwater pulses in the northern North Atlantic: retrodiction and forecast by numerical modelling
Changes in sea surface salinity, especially by sudden meltwater pulses, are the most e§ective process to modify the circulation in the Greenland Iceland Norwegian (GIN) seas. With "Sensitivity and Circulation of the Northern North Atlantic" (SCINNA), a three-dimensional ocean general circu...
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ftawi:oai:epic.awi.de:12182 2023-09-05T13:19:10+02:00 Meltwater pulses in the northern North Atlantic: retrodiction and forecast by numerical modelling Schäfer-Neth, Christian Stattegger, K. 1997 application/pdf https://epic.awi.de/id/eprint/12182/ https://epic.awi.de/id/eprint/12182/1/Sch1997am.pdf https://hdl.handle.net/10013/epic.22615 https://hdl.handle.net/10013/epic.22615.d001 unknown https://epic.awi.de/id/eprint/12182/1/Sch1997am.pdf https://hdl.handle.net/10013/epic.22615.d001 Schäfer-Neth, C. orcid:0000-0002-6995-8706 and Stattegger, K. (1997) Meltwater pulses in the northern North Atlantic: retrodiction and forecast by numerical modelling , Geologische Rundschau, 86 , pp. 492-498 . hdl:10013/epic.22615 EPIC3Geologische Rundschau, 86, pp. 492-498 Article peerRev 1997 ftawi 2023-08-22T19:49:48Z Changes in sea surface salinity, especially by sudden meltwater pulses, are the most e§ective process to modify the circulation in the Greenland Iceland Norwegian (GIN) seas. With "Sensitivity and Circulation of the Northern North Atlantic" (SCINNA), a three-dimensional ocean general circulation model, several experiments addressing the possible effects of meltwater inputs of different intensities were carried out. The experiments used (a) the last glacial maximum (LGM) reconstruction based on oxygen isotopes data from sediment cores and (b) the modern conditions of the GIN seas for their initial states. Meltwater inputs from Europe as recorded during the last deglaciation succeeding the LGM change the circulation pattern drastically. These pulses can push the high-salinity in-flow from the northeast Atlantic away from Europe over to the southern coast of Iceland, thus allowing the low-salinity meltwater to spread all over the GIN seas. As a result, the deepwater formation in this region can be turned off and the circulation system shifts from the normal cyclonal-antiestuarine into an anticyclonal-estuarine mode. On the contrary, meltwater pulses originating from Greenland due to global warming mainly intensify the East Greenland Current without altering the overall circulation and temperature/salinity patterns significantly because they chiefly enhance the salinity minimum off the Greenland coast. Article in Journal/Newspaper East Greenland east greenland current Greenland Iceland North Atlantic Northeast Atlantic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Greenland |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Changes in sea surface salinity, especially by sudden meltwater pulses, are the most e§ective process to modify the circulation in the Greenland Iceland Norwegian (GIN) seas. With "Sensitivity and Circulation of the Northern North Atlantic" (SCINNA), a three-dimensional ocean general circulation model, several experiments addressing the possible effects of meltwater inputs of different intensities were carried out. The experiments used (a) the last glacial maximum (LGM) reconstruction based on oxygen isotopes data from sediment cores and (b) the modern conditions of the GIN seas for their initial states. Meltwater inputs from Europe as recorded during the last deglaciation succeeding the LGM change the circulation pattern drastically. These pulses can push the high-salinity in-flow from the northeast Atlantic away from Europe over to the southern coast of Iceland, thus allowing the low-salinity meltwater to spread all over the GIN seas. As a result, the deepwater formation in this region can be turned off and the circulation system shifts from the normal cyclonal-antiestuarine into an anticyclonal-estuarine mode. On the contrary, meltwater pulses originating from Greenland due to global warming mainly intensify the East Greenland Current without altering the overall circulation and temperature/salinity patterns significantly because they chiefly enhance the salinity minimum off the Greenland coast. |
format |
Article in Journal/Newspaper |
author |
Schäfer-Neth, Christian Stattegger, K. |
spellingShingle |
Schäfer-Neth, Christian Stattegger, K. Meltwater pulses in the northern North Atlantic: retrodiction and forecast by numerical modelling |
author_facet |
Schäfer-Neth, Christian Stattegger, K. |
author_sort |
Schäfer-Neth, Christian |
title |
Meltwater pulses in the northern North Atlantic: retrodiction and forecast by numerical modelling |
title_short |
Meltwater pulses in the northern North Atlantic: retrodiction and forecast by numerical modelling |
title_full |
Meltwater pulses in the northern North Atlantic: retrodiction and forecast by numerical modelling |
title_fullStr |
Meltwater pulses in the northern North Atlantic: retrodiction and forecast by numerical modelling |
title_full_unstemmed |
Meltwater pulses in the northern North Atlantic: retrodiction and forecast by numerical modelling |
title_sort |
meltwater pulses in the northern north atlantic: retrodiction and forecast by numerical modelling |
publishDate |
1997 |
url |
https://epic.awi.de/id/eprint/12182/ https://epic.awi.de/id/eprint/12182/1/Sch1997am.pdf https://hdl.handle.net/10013/epic.22615 https://hdl.handle.net/10013/epic.22615.d001 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland east greenland current Greenland Iceland North Atlantic Northeast Atlantic |
genre_facet |
East Greenland east greenland current Greenland Iceland North Atlantic Northeast Atlantic |
op_source |
EPIC3Geologische Rundschau, 86, pp. 492-498 |
op_relation |
https://epic.awi.de/id/eprint/12182/1/Sch1997am.pdf https://hdl.handle.net/10013/epic.22615.d001 Schäfer-Neth, C. orcid:0000-0002-6995-8706 and Stattegger, K. (1997) Meltwater pulses in the northern North Atlantic: retrodiction and forecast by numerical modelling , Geologische Rundschau, 86 , pp. 492-498 . hdl:10013/epic.22615 |
_version_ |
1776199980843794432 |