The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity
The mechanism triggering centennial-to-millennial-scale variability of the Atlantic Meridional Overturning Circulation (AMOC) in the earth system model of intermediate complexity LOVECLIM is investigated. It is found that for several climate boundary conditions such as low obliquity values (similar...
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Language: | English |
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ftvliz:oai:oma.vliz.be:296096 2023-05-15T16:35:20+02:00 The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity Friedrich, T. Timmermann, A. Menviel, L. Timm, O.E. Mouchet, A. Roche, D.M. 2010 application/pdf https://www.vliz.be/imisdocs/publications/315266.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000285965100004 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/gmd-3-377-2010 https://www.vliz.be/imisdocs/publications/315266.pdf info:eu-repo/semantics/openAccess %3Ci%3EGeosci.+Model+Dev.+3%282%29%3C%2Fi%3E%3A+377-389.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.5194%2Fgmd-3-377-2010%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.5194%2Fgmd-3-377-2010%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2010 ftvliz https://doi.org/10.5194/gmd-3-377-2010 2022-05-01T11:00:50Z The mechanism triggering centennial-to-millennial-scale variability of the Atlantic Meridional Overturning Circulation (AMOC) in the earth system model of intermediate complexity LOVECLIM is investigated. It is found that for several climate boundary conditions such as low obliquity values (similar to 22.1°) or LGM-albedo, internally generated centennial-to-millennial-scale variability occurs in the North Atlantic region. Stochastic excitations of the density-driven overturning circulation in the Nordic Seas can create regional sea-ice anomalies and a subsequent reorganization of the atmospheric circulation. The resulting remote atmospheric anomalies over the Hudson Bay can release freshwater pulses into the Labrador Sea and significantly increase snow fall in this region leading to a subsequent reduction of convective activity. The millennial-scale AMOC oscillations disappear if LGM bathymetry (with closed Hudson Bay) is prescribed or if freshwater pulses are suppressed artificially. Furthermore, our study documents the process of the AMOC recovery as well as the global marine and terrestrial carbon cycle response to centennial-to-millennial-scale AMOC variability. Article in Journal/Newspaper Hudson Bay Labrador Sea Nordic Seas North Atlantic Sea ice Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Hudson Hudson Bay Geoscientific Model Development 3 2 377 389 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
The mechanism triggering centennial-to-millennial-scale variability of the Atlantic Meridional Overturning Circulation (AMOC) in the earth system model of intermediate complexity LOVECLIM is investigated. It is found that for several climate boundary conditions such as low obliquity values (similar to 22.1°) or LGM-albedo, internally generated centennial-to-millennial-scale variability occurs in the North Atlantic region. Stochastic excitations of the density-driven overturning circulation in the Nordic Seas can create regional sea-ice anomalies and a subsequent reorganization of the atmospheric circulation. The resulting remote atmospheric anomalies over the Hudson Bay can release freshwater pulses into the Labrador Sea and significantly increase snow fall in this region leading to a subsequent reduction of convective activity. The millennial-scale AMOC oscillations disappear if LGM bathymetry (with closed Hudson Bay) is prescribed or if freshwater pulses are suppressed artificially. Furthermore, our study documents the process of the AMOC recovery as well as the global marine and terrestrial carbon cycle response to centennial-to-millennial-scale AMOC variability. |
format |
Article in Journal/Newspaper |
author |
Friedrich, T. Timmermann, A. Menviel, L. Timm, O.E. Mouchet, A. Roche, D.M. |
spellingShingle |
Friedrich, T. Timmermann, A. Menviel, L. Timm, O.E. Mouchet, A. Roche, D.M. The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
author_facet |
Friedrich, T. Timmermann, A. Menviel, L. Timm, O.E. Mouchet, A. Roche, D.M. |
author_sort |
Friedrich, T. |
title |
The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
title_short |
The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
title_full |
The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
title_fullStr |
The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
title_full_unstemmed |
The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
title_sort |
mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
publishDate |
2010 |
url |
https://www.vliz.be/imisdocs/publications/315266.pdf |
geographic |
Hudson Hudson Bay |
geographic_facet |
Hudson Hudson Bay |
genre |
Hudson Bay Labrador Sea Nordic Seas North Atlantic Sea ice |
genre_facet |
Hudson Bay Labrador Sea Nordic Seas North Atlantic Sea ice |
op_source |
%3Ci%3EGeosci.+Model+Dev.+3%282%29%3C%2Fi%3E%3A+377-389.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.5194%2Fgmd-3-377-2010%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.5194%2Fgmd-3-377-2010%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000285965100004 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/gmd-3-377-2010 https://www.vliz.be/imisdocs/publications/315266.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/gmd-3-377-2010 |
container_title |
Geoscientific Model Development |
container_volume |
3 |
container_issue |
2 |
container_start_page |
377 |
op_container_end_page |
389 |
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1766025562008059904 |