Not logged in
Data Publisher for Earth & Environmental Science

Bartoli, Gretta; Sarnthein, Michael; Weinelt, Mara; Erlenkeuser, Helmut; Garbe-Schönberg, Carl-Dieter; Lea, David W (2005): Stable isotope analysis and temperature reconstruction data from DSDP Hole 94-609B and ODP Hole 162-984B. PANGAEA,, 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,

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

RIS CitationBibTeX CitationShow MapGoogle Earth

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.
Impact of Gateways on Ocean Circulation, Climate, and Evolution (OceanGateways)
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
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 * Device: Drilling/drill rig (DRILL) * Comment: 53 cores; 503.7 m cored; 0 m drilled; 91 % recovery
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 * Device: Drilling/drill rig (DRILL) * Comment: 37 cores; 345.1 m cored; 9.6 m drilled; 89.3 % recovery
14 datasets

Download Data

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

Datasets listed in this Collection