Liu, Zhonghui; Pagani, Mark; Zinniker, David; DeConto, Robert M; Huber, Matthew; Brinkhuis, Henk; Shah, Sunita R; Leckie, R Mark; Pearson, Ann (2009): Global cooling during the Eocene Oligocene Transition [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.771853, Supplement to: Liu, Z et al. (2009): Global cooling during the Eocene-Oligocene climate transition. Science, 323(5918), 1187-1190, https://doi.org/10.1126/science.1166368
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Abstract:
About 34 million years ago, Earth's climate shifted from a relatively ice-free world to one with glacial conditions on Antarctica characterized by substantial ice sheets. How Earth's temperature changed during this climate transition remains poorly understood, and evidence for Northern Hemisphere polar ice is controversial. Here, we report proxy records of sea surface temperatures from multiple ocean localities and show that the high-latitude temperature decrease was substantial and heterogeneous. High-latitude (45 degrees to 70 degrees in both hemispheres) temperatures before the climate transition were ~20°C and cooled an average of ~5°C. Our results, combined with ocean and ice-sheet model simulations and benthic oxygen isotope records, indicate that Northern Hemisphere glaciation was not required to accommodate the magnitude of continental ice growth during this time.
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -5.156209 * Median Longitude: 53.797395 * South-bound Latitude: -52.223800 * West-bound Longitude: -79.973933 * North-bound Latitude: 75.489100 * East-bound Longitude: 166.191300
Date/Time Start: 1973-03-11T00:00:00 * Date/Time End: 1997-12-25T00:00:00
Event(s):
29-277 * Latitude: -52.223800 * Longitude: 166.191300 * Date/Time: 1973-03-11T00:00:00 * Elevation: -1214.0 m * Penetration: 472.5 m * Recovery: 253.4 m * Location: Antarctic Ocean/PLATEAU * Campaign: Leg29 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 45 cores; 425 m cored; 0 m drilled; 59.6 % recovery
38-336 * Latitude: 63.351000 * Longitude: -7.787800 * Date/Time: 1974-08-07T00:00:00 * Elevation: -811.0 m * Penetration: 515 m * Recovery: 219.9 m * Location: North Atlantic/Norwegian Sea * Campaign: Leg38 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 42 cores; 383.5 m cored; 19 m drilled; 57.3 % recovery
71-511 * Latitude: -51.004700 * Longitude: -46.971700 * Date/Time: 1980-01-15T00:00:00 * Elevation: -2589.0 m * Penetration: 632 m * Recovery: 384.4 m * Location: South Atlantic/PLATEAU * Campaign: Leg71 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 68 cores; 616.5 m cored; 14.5 m drilled; 62.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- Liu, Z; Pagani, M; Zinniker, D et al. (2009): (Table S2) Age control points used to derive Eocene-Oligocene chronologies for DSDP and ODP sites. https://doi.org/10.1594/PANGAEA.771848
- Liu, Z; Pagani, M; Zinniker, D et al. (2009): (Table S3) Mean sea surface temperture values of the Eocene-Oligocene Transition at individual DSDP and ODP sites. https://doi.org/10.1594/PANGAEA.771852