Deglacial intermediate water reorganization: new evidence from the Indian Ocean
The importance of intermediate water masses in climate change and ocean circulation has been emphasized recently. In particular, Southern Ocean Intermediate Waters (SOIW), such as Antarctic Intermediate Water and Subantarctic Mode Water, are thought to have acted as active interhemispheric transmitt...
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Online Access: | https://doi.org/10.5194/cp-10-293-2014 https://cp.copernicus.org/articles/10/293/2014/ |
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ftcopernicus:oai:publications.copernicus.org:cp20852 2023-05-15T13:54:27+02:00 Deglacial intermediate water reorganization: new evidence from the Indian Ocean Romahn, S. Mackensen, A. Groeneveld, J. Pätzold, J. 2018-09-27 application/pdf https://doi.org/10.5194/cp-10-293-2014 https://cp.copernicus.org/articles/10/293/2014/ eng eng doi:10.5194/cp-10-293-2014 https://cp.copernicus.org/articles/10/293/2014/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cp-10-293-2014 2020-07-20T16:25:11Z The importance of intermediate water masses in climate change and ocean circulation has been emphasized recently. In particular, Southern Ocean Intermediate Waters (SOIW), such as Antarctic Intermediate Water and Subantarctic Mode Water, are thought to have acted as active interhemispheric transmitter of climate anomalies. Here we reconstruct changes in SOIW signature and spatial and temporal evolution based on a 40 kyr time series of oxygen and carbon isotopes as well as planktic Mg/Ca based thermometry from Site GeoB12615-4 in the western Indian Ocean. Our data suggest that SOIW transmitted Antarctic temperature trends to the equatorial Indian Ocean via the "oceanic tunnel" mechanism. Moreover, our results reveal that deglacial SOIW carried a signature of aged Southern Ocean deep water. We find no evidence of increased formation of intermediate waters during the deglaciation. Text Antarc* Antarctic Southern Ocean Copernicus Publications: E-Journals Antarctic Indian Southern Ocean Climate of the Past 10 1 293 303 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
The importance of intermediate water masses in climate change and ocean circulation has been emphasized recently. In particular, Southern Ocean Intermediate Waters (SOIW), such as Antarctic Intermediate Water and Subantarctic Mode Water, are thought to have acted as active interhemispheric transmitter of climate anomalies. Here we reconstruct changes in SOIW signature and spatial and temporal evolution based on a 40 kyr time series of oxygen and carbon isotopes as well as planktic Mg/Ca based thermometry from Site GeoB12615-4 in the western Indian Ocean. Our data suggest that SOIW transmitted Antarctic temperature trends to the equatorial Indian Ocean via the "oceanic tunnel" mechanism. Moreover, our results reveal that deglacial SOIW carried a signature of aged Southern Ocean deep water. We find no evidence of increased formation of intermediate waters during the deglaciation. |
format |
Text |
author |
Romahn, S. Mackensen, A. Groeneveld, J. Pätzold, J. |
spellingShingle |
Romahn, S. Mackensen, A. Groeneveld, J. Pätzold, J. Deglacial intermediate water reorganization: new evidence from the Indian Ocean |
author_facet |
Romahn, S. Mackensen, A. Groeneveld, J. Pätzold, J. |
author_sort |
Romahn, S. |
title |
Deglacial intermediate water reorganization: new evidence from the Indian Ocean |
title_short |
Deglacial intermediate water reorganization: new evidence from the Indian Ocean |
title_full |
Deglacial intermediate water reorganization: new evidence from the Indian Ocean |
title_fullStr |
Deglacial intermediate water reorganization: new evidence from the Indian Ocean |
title_full_unstemmed |
Deglacial intermediate water reorganization: new evidence from the Indian Ocean |
title_sort |
deglacial intermediate water reorganization: new evidence from the indian ocean |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-10-293-2014 https://cp.copernicus.org/articles/10/293/2014/ |
geographic |
Antarctic Indian Southern Ocean |
geographic_facet |
Antarctic Indian Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-10-293-2014 https://cp.copernicus.org/articles/10/293/2014/ |
op_doi |
https://doi.org/10.5194/cp-10-293-2014 |
container_title |
Climate of the Past |
container_volume |
10 |
container_issue |
1 |
container_start_page |
293 |
op_container_end_page |
303 |
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1766260369240621056 |