Citation:

journal.pone.0081508

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Abstract:

The early Late Pliocene (3.6 to ~3.0 million years ago) is the last extended interval in Earth's history when atmospheric CO2 concentrations were comparable to today's and global climate was warmer. Yet a severe global glaciation during marine isotope stage (MIS) M2 interrupted this phase of global warmth ~3.30 million years ago, and is seen as a premature attempt of the climate system to establish an ice-age world. Our geochemical and palynological records from five marine sediment cores along a Caribbean to eastern North Atlantic transect show that increased Pacific-to-Atlantic flow via the Central American Seaway weakened the North Atlantic Current (NAC) and attendant northward heat transport prior to MIS M2. The consequent cooling of the northern high latitude oceans permitted expansion of the Greenland ice sheet during MIS M2, despite near-modern atmospheric CO2 concentrations. Before and after MIS M2, heat transport via the NAC was crucial in maintaining warm climates comparable to those predicted for the end of this century.

Project(s):

Deep Sea Drilling Project (DSDP)

Integrated Ocean Drilling Program / International Ocean Discovery Program (IODP)

Ocean Drilling Program (ODP)

Coverage:

Median Latitude: 38.467973 * Median Longitude: -44.970503 * South-bound Latitude: 12.744000 * West-bound Longitude: -78.739300 * North-bound Latitude: 53.221500 * East-bound Longitude: -18.886800

Date/Time Start: 1983-05-05T00:00:00 * Date/Time End: 2004-04-02T00:00:00

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

10 datasets

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Datasets listed in this publication series

De Schepper, S; Groeneveld, J; Naafs, BDA et al. (2013): Dinoflagellate cyst assemblages of DSDP Hole 93-603C. https://doi.org/10.1594/PANGAEA.804666
De Schepper, S; Groeneveld, J; Naafs, BDA et al. (2013): Oxygen isotope records of foraminifera, and alkenone and Mg/Ca-based SST estimates for DSDP Hole 93-603C. https://doi.org/10.1594/PANGAEA.804667
De Schepper, S; Groeneveld, J; Naafs, BDA et al. (2013): Dinoflagellate cyst assemblages of DSDP Hole 94-610A. https://doi.org/10.1594/PANGAEA.804668
De Schepper, S; Groeneveld, J; Naafs, BDA et al. (2013): Oxygen isotope records of foraminifera, and alkenone and Mg/Ca-based SST estimates for DSDP Hole 94-610A. https://doi.org/10.1594/PANGAEA.804669
De Schepper, S; Groeneveld, J; Naafs, BDA et al. (2013): Dinoflagellate cyst assemblages of ODP Hole 165-999A. https://doi.org/10.1594/PANGAEA.804676
De Schepper, S; Groeneveld, J; Naafs, BDA et al. (2013): Oxygen isotope records of foraminifera, and alkenone and Mg/Ca-based SST estimates for ODP Hole 165-999A. https://doi.org/10.1594/PANGAEA.804671
De Schepper, S; Groeneveld, J; Naafs, BDA et al. (2013): Dinoflagellate cyst assemblages of IODP Hole 303-U1308C. https://doi.org/10.1594/PANGAEA.804672
De Schepper, S; Groeneveld, J; Naafs, BDA et al. (2013): Dinoflagellate cyst assemblages of IODP Hole 303-U1313. https://doi.org/10.1594/PANGAEA.804674
De Schepper, S; Groeneveld, J; Naafs, BDA et al. (2013): Oxygen isotope records of foraminifera, and alkenone and Mg/Ca-based SST estimates for IODP Hole 303-U1308C. https://doi.org/10.1594/PANGAEA.804673
De Schepper, S; Groeneveld, J; Naafs, BDA et al. (2013): Oxygen isotope records of foraminifera, and alkenone and Mg/Ca-based SST estimates for IODP Site 306-U1313. https://doi.org/10.1594/PANGAEA.804675