The role of ocean gateways on cooling climate on long time scales
We examine ocean changes in response to changes in paleogeography from the Cretaceous to present in an intermediate complexity model and in the fully coupled CCSM3 model. Greenhouse gas concentrations are kept constant to allow a focus on effects arising from changing continental configurations. We...
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ftoceanrep:oai:oceanrep.geomar.de:26128 2023-05-15T13:56:54+02:00 The role of ocean gateways on cooling climate on long time scales Sijp, Willem P. von der Heydt, Anna S. Dijkstra, Henk A. Flögel, Sascha Douglas, Peter M. J. Bijl, Peter K. 2014-08 text https://oceanrep.geomar.de/id/eprint/26128/ https://oceanrep.geomar.de/id/eprint/26128/1/Sijk.pdf https://doi.org/10.1016/j.gloplacha.2014.04.004 en eng Elsevier https://oceanrep.geomar.de/id/eprint/26128/1/Sijk.pdf Sijp, W. P., von der Heydt, A. S., Dijkstra, H. A., Flögel, S., Douglas, P. M. J. and Bijl, P. K. (2014) The role of ocean gateways on cooling climate on long time scales. Global and Planetary Change, 119 . pp. 1-22. DOI 10.1016/j.gloplacha.2014.04.004 <https://doi.org/10.1016/j.gloplacha.2014.04.004>. doi:10.1016/j.gloplacha.2014.04.004 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2014 ftoceanrep https://doi.org/10.1016/j.gloplacha.2014.04.004 2023-04-07T15:15:19Z We examine ocean changes in response to changes in paleogeography from the Cretaceous to present in an intermediate complexity model and in the fully coupled CCSM3 model. Greenhouse gas concentrations are kept constant to allow a focus on effects arising from changing continental configurations. We find consistent and significant geography-related Cenozoic cooling arising from the opening of Southern Ocean (SO) gateways. Both models show significant deep ocean cooling arising from tectonic evolution alone. Simulations employing continental configurations associated with greenhouse climates, namely the Turonian and the Eocene simulations, systematically exhibit warm deep ocean temperatures at elevated pCO2 close to 10 °C. In contrast, continental configurations associated with (later) icehouse climates are associated with cooler deep ocean temperatures at identical pCO2, arising from a progressive strengthening of the Antarctic Circumpolar Current. This suggests that a component of the Cenozoic benthic cooling trend recorded in oxygen isotopes could arise directly from changes in continental configuration, and so be partially decoupled from the Cenozoic greenhouse gas history. In this paper we will present our model results against the background of an extensive review of previous work on ocean gateways and additional modelling results from several other global climate models. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Southern Ocean The Antarctic Global and Planetary Change 119 1 22 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
We examine ocean changes in response to changes in paleogeography from the Cretaceous to present in an intermediate complexity model and in the fully coupled CCSM3 model. Greenhouse gas concentrations are kept constant to allow a focus on effects arising from changing continental configurations. We find consistent and significant geography-related Cenozoic cooling arising from the opening of Southern Ocean (SO) gateways. Both models show significant deep ocean cooling arising from tectonic evolution alone. Simulations employing continental configurations associated with greenhouse climates, namely the Turonian and the Eocene simulations, systematically exhibit warm deep ocean temperatures at elevated pCO2 close to 10 °C. In contrast, continental configurations associated with (later) icehouse climates are associated with cooler deep ocean temperatures at identical pCO2, arising from a progressive strengthening of the Antarctic Circumpolar Current. This suggests that a component of the Cenozoic benthic cooling trend recorded in oxygen isotopes could arise directly from changes in continental configuration, and so be partially decoupled from the Cenozoic greenhouse gas history. In this paper we will present our model results against the background of an extensive review of previous work on ocean gateways and additional modelling results from several other global climate models. |
format |
Article in Journal/Newspaper |
author |
Sijp, Willem P. von der Heydt, Anna S. Dijkstra, Henk A. Flögel, Sascha Douglas, Peter M. J. Bijl, Peter K. |
spellingShingle |
Sijp, Willem P. von der Heydt, Anna S. Dijkstra, Henk A. Flögel, Sascha Douglas, Peter M. J. Bijl, Peter K. The role of ocean gateways on cooling climate on long time scales |
author_facet |
Sijp, Willem P. von der Heydt, Anna S. Dijkstra, Henk A. Flögel, Sascha Douglas, Peter M. J. Bijl, Peter K. |
author_sort |
Sijp, Willem P. |
title |
The role of ocean gateways on cooling climate on long time scales |
title_short |
The role of ocean gateways on cooling climate on long time scales |
title_full |
The role of ocean gateways on cooling climate on long time scales |
title_fullStr |
The role of ocean gateways on cooling climate on long time scales |
title_full_unstemmed |
The role of ocean gateways on cooling climate on long time scales |
title_sort |
role of ocean gateways on cooling climate on long time scales |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/26128/ https://oceanrep.geomar.de/id/eprint/26128/1/Sijk.pdf https://doi.org/10.1016/j.gloplacha.2014.04.004 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/26128/1/Sijk.pdf Sijp, W. P., von der Heydt, A. S., Dijkstra, H. A., Flögel, S., Douglas, P. M. J. and Bijl, P. K. (2014) The role of ocean gateways on cooling climate on long time scales. Global and Planetary Change, 119 . pp. 1-22. DOI 10.1016/j.gloplacha.2014.04.004 <https://doi.org/10.1016/j.gloplacha.2014.04.004>. doi:10.1016/j.gloplacha.2014.04.004 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.gloplacha.2014.04.004 |
container_title |
Global and Planetary Change |
container_volume |
119 |
container_start_page |
1 |
op_container_end_page |
22 |
_version_ |
1766264511513231360 |