Stable isotope analysis and temperature reconstruction data from DSDP Hole 94-609B and ODP Hole 162-984B
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| Auteurs principaux: | , , , , , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2005
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| _version_ | 1867168550193463296 |
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| author | Bartoli, Gretta Sarnthein, Michael Weinelt, Mara Erlenkeuser, Helmut Garbe-Schönberg, Dieter Lea, David W |
| author_facet | Bartoli, Gretta Sarnthein, Michael Weinelt, Mara Erlenkeuser, Helmut Garbe-Schönberg, Dieter Lea, David W |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Greenland ice sheet is accepted as a key factor controlling the Quaternary glacial scenario. However, the origin and mechanisms of major Arctic glaciation starting at 3.15 Ma and culminating at 2.74 Ma are still controversial. For this phase of intense cooling Ravelo et al. proposed a complex gradual forcing mechanism. In contrast, our new submillennial-scale paleoceanographic records from the Pliocene North Atlantic suggest a far more precise timing and forcing for the initiation of northern hemisphere glaciation (NHG), since it was linked to a 2-3 °C surface water warming during warm stages from 2.95 to 2.82 Ma. These records support previous models, claiming that the final closure of the Panama Isthmus (3.0- ~2.5 Ma induced an increased poleward salt and heat transport. Associated strengthening of North Atlantic Thermohaline Circulation and in turn, an intensified moisture supply to northern high latitudes resulted in the build-up of NHG, finally culminating in the great, irreversible climate crash at marine isotope stage G6 (2.74 Ma). In summary, there was a two-step threshold mechanism that marked the onset of NHG with glacial-to-interglacial cycles quasi-persistent until today. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_484677 |
| institution | PANGAEA |
| language | en |
| publishDate | 2005 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Stable isotope analysis and temperature reconstruction data from DSDP Hole 94-609B and ODP Hole 162-984B Bartoli, Gretta Sarnthein, Michael Weinelt, Mara Erlenkeuser, Helmut Garbe-Schönberg, Dieter Lea, David W 162-984B; 94-609B; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Impact of Gateways on Ocean Circulation, Climate, and Evolution; Joides Resolution; Leg162; Leg94; North Atlantic/FLANK; North Atlantic Ocean; Ocean Drilling Program; OceanGateways; ODP The Greenland ice sheet is accepted as a key factor controlling the Quaternary glacial scenario. However, the origin and mechanisms of major Arctic glaciation starting at 3.15 Ma and culminating at 2.74 Ma are still controversial. For this phase of intense cooling Ravelo et al. proposed a complex gradual forcing mechanism. In contrast, our new submillennial-scale paleoceanographic records from the Pliocene North Atlantic suggest a far more precise timing and forcing for the initiation of northern hemisphere glaciation (NHG), since it was linked to a 2-3 °C surface water warming during warm stages from 2.95 to 2.82 Ma. These records support previous models, claiming that the final closure of the Panama Isthmus (3.0- ~2.5 Ma induced an increased poleward salt and heat transport. Associated strengthening of North Atlantic Thermohaline Circulation and in turn, an intensified moisture supply to northern high latitudes resulted in the build-up of NHG, finally culminating in the great, irreversible climate crash at marine isotope stage G6 (2.74 Ma). In summary, there was a two-step threshold mechanism that marked the onset of NHG with glacial-to-interglacial cycles quasi-persistent until today. |
| title | Stable isotope analysis and temperature reconstruction data from DSDP Hole 94-609B and ODP Hole 162-984B |
| topic | 162-984B; 94-609B; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Impact of Gateways on Ocean Circulation, Climate, and Evolution; Joides Resolution; Leg162; Leg94; North Atlantic/FLANK; North Atlantic Ocean; Ocean Drilling Program; OceanGateways; ODP |
| url | https://doi.org/10.1594/PANGAEA.484677 |