Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Bartoli, Gretta; Sarnthein, Michael; Weinelt, Mara; Erlenkeuser, Helmut; Garbe-Schönberg, Dieter; Lea, David W (2005): Stable isotope analysis and temperature reconstruction data from DSDP Hole 94-609B and ODP Hole 162-984B [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.484677, Supplement to: Bartoli, G et al. (2005): Final closure of Panama and the onset of northern hemisphere glaciation. Earth and Planetary Science Letters, 237, 33-44, https://doi.org/10.1016/j.epsl.2005.06.020

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
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.
Project(s):
Deep Sea Drilling Project (DSDP)
Impact of Gateways on Ocean Circulation, Climate, and Evolution (OceanGateways)
Ocean Drilling Program (ODP)
Funding:
German Research Foundation (DFG), grant/award no. 5468851: Impact of Gateways on Ocean Circulation, Climate, and Evolution
Coverage:
Median Latitude: 53.177086 * Median Longitude: -24.193714 * South-bound Latitude: 49.877800 * West-bound Longitude: -24.238200 * North-bound Latitude: 61.425300 * East-bound Longitude: -24.082500
Date/Time Start: 1983-07-22T00:00:00 * Date/Time End: 1995-07-28T08:20:00
Event(s):
94-609B * Latitude: 49.877800 * Longitude: -24.238200 * Date/Time: 1983-07-22T00:00:00 * Elevation: -3883.0 m * Penetration: 354.7 m * Recovery: 308.1 m * Location: North Atlantic/FLANK * Campaign: Leg94 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 37 cores; 345.1 m cored; 9.6 m drilled; 89.3 % recovery
162-984B * Latitude: 61.425300 * Longitude: -24.082500 * Date/Time Start: 1995-07-25T02:46:00 * Date/Time End: 1995-07-28T08:20:00 * Elevation: -1648.0 m * Penetration: 503.7 m * Recovery: 458.26 m * Location: North Atlantic Ocean * Campaign: Leg162 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 53 cores; 503.7 m cored; 0 m drilled; 91 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
14 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): CaCO3 content of DSDP Hole 94-609B. https://doi.org/10.1594/PANGAEA.841203
  2. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Stable carbon isotopes measured on benthic foraminifera from DSDP Hole 94-609B. https://doi.org/10.1594/PANGAEA.271199
  3. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Stable oxygen isotopes of benthic foraminifera of DSDP Hole 94-609B. https://doi.org/10.1594/PANGAEA.271194
  4. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Stable oxygen isotopes measured on Globigerina bulloides from DSDP Hole 94-609B. https://doi.org/10.1594/PANGAEA.271192
  5. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Deep-water temperature reconstructed from Mg/Ca ratios in DSDP Hole 94-609B. https://doi.org/10.1594/PANGAEA.271198
  6. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Stable isotopes measured on benthic foraminifera of DSDP Hole 94-609B, raw data. https://doi.org/10.1594/PANGAEA.841209
  7. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Stable isotopes measured on Globigerina bulloides of DSDP Hole 94-609B, raw data. https://doi.org/10.1594/PANGAEA.841210
  8. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Stable isotopes measured on Globigerinoides ruber of DSDP Hole 94-609B, raw data. https://doi.org/10.1594/PANGAEA.841211
  9. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Mg/Ca and Sr/Ca ratios of Gyroidinoides spp. of DSDP Hole 94-609B. https://doi.org/10.1594/PANGAEA.841204
  10. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Globigerina bulloides Magnesium/Calcium ratio and SST values from DSDP Hole 94-609B. https://doi.org/10.1594/PANGAEA.271535
  11. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Stable oxygen isotopes measured on Globigerina bulloides from ODP Hole 162-984B. https://doi.org/10.1594/PANGAEA.271193
  12. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Stable oxygen isotopes measured on Neogloboquadrina atlantica from ODP Hole 162-984B. https://doi.org/10.1594/PANGAEA.271543
  13. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Globigerina bulloides Magnesium/Calcium ratio and SST values from ODP Hole 162-984B. https://doi.org/10.1594/PANGAEA.271425
  14. Bartoli, G; Sarnthein, M; Weinelt, M et al. (2005): Neogloboquadrina atlantica Magnesium/Calcium ratio and SST values from ODP Hole 162-984B. https://doi.org/10.1594/PANGAEA.271473