Stable carbon and oxygen isotope record of Neogloboquadrina pachyderma and Cibicides lobatulus from the southwestern Greenland Sea
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2005
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| _version_ | 1867172221749821440 |
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| author | Millo, Christian Sarnthein, Michael Erlenkeuser, Helmut Frederichs, Thomas |
| author_facet | Millo, Christian Sarnthein, Michael Erlenkeuser, Helmut Frederichs, Thomas |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | A core transect across the southwestern Greenland Sea reveals coeval events of extremely negative planktic and benthic delta13C excursions between 40 and 87 ka. The most pronounced event, event 1, began at peak Dansgaard-Oeschger stadial 22 (85 ka) with a duration of 18 k.y. During this episode, incursions of Atlantic Intermediate Water caused a bottom-water warming of up to 8 °C. The amplitude, timing, and geographic pattern of the delta13C events suggest that this bottom-water warming triggered clathrate instability along the East Greenland slope and a methane-induced depletion of delta13CDIC (DIC- dissolved inorganic carbon). Since delta13C event 1 matches a major peak in atmospheric CH4 concentration, this clathrate destabilization may have contributed to the rise in atmospheric CH4 and thus to climate warming over marine isotope stage 5.1. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_738187 |
| institution | PANGAEA |
| language | en |
| publishDate | 2005 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Stable carbon and oxygen isotope record of Neogloboquadrina pachyderma and Cibicides lobatulus from the southwestern Greenland Sea Millo, Christian Sarnthein, Michael Erlenkeuser, Helmut Frederichs, Thomas ARK-XVIII/1; GIK/IfG; Iceland Sea; Impact of Gateways on Ocean Circulation, Climate, and Evolution; Institute for Geosciences, Christian Albrechts University, Kiel; OceanGateways; Ocean Gateways; Oceanpassagen; PC; Piston corer; Polarstern; PS62; PS62/015-3; PS62/017-4 A core transect across the southwestern Greenland Sea reveals coeval events of extremely negative planktic and benthic delta13C excursions between 40 and 87 ka. The most pronounced event, event 1, began at peak Dansgaard-Oeschger stadial 22 (85 ka) with a duration of 18 k.y. During this episode, incursions of Atlantic Intermediate Water caused a bottom-water warming of up to 8 °C. The amplitude, timing, and geographic pattern of the delta13C events suggest that this bottom-water warming triggered clathrate instability along the East Greenland slope and a methane-induced depletion of delta13CDIC (DIC- dissolved inorganic carbon). Since delta13C event 1 matches a major peak in atmospheric CH4 concentration, this clathrate destabilization may have contributed to the rise in atmospheric CH4 and thus to climate warming over marine isotope stage 5.1. |
| title | Stable carbon and oxygen isotope record of Neogloboquadrina pachyderma and Cibicides lobatulus from the southwestern Greenland Sea |
| topic | ARK-XVIII/1; GIK/IfG; Iceland Sea; Impact of Gateways on Ocean Circulation, Climate, and Evolution; Institute for Geosciences, Christian Albrechts University, Kiel; OceanGateways; Ocean Gateways; Oceanpassagen; PC; Piston corer; Polarstern; PS62; PS62/015-3; PS62/017-4 |
| url | https://doi.org/10.1594/PANGAEA.738187 |