Sea surface temperature reconstruction for IODP Site 306-U1313 ...
During the late Pliocene global climate changed drastically as the Northern Hemisphere glaciation (NHG) intensified. It remains poorly understood how the North Atlantic Current (NAC) changed in strength and position during this time interval. Such changes may alter the amount of northward heat trans...
| Main Authors: | , , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
PANGAEA
2010
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.744483 https://doi.pangaea.de/10.1594/PANGAEA.744483 |
| Summary: | During the late Pliocene global climate changed drastically as the Northern Hemisphere glaciation (NHG) intensified. It remains poorly understood how the North Atlantic Current (NAC) changed in strength and position during this time interval. Such changes may alter the amount of northward heat transport and therefore have a large impact on climate in the circum-North Atlantic region and the growth of Northern Hemisphere ice sheets. Using the alkenone biomarker we reconstructed orbitally resolved sea surface temperature (SST) and productivity records at Integrated Ocean Drilling Project (IODP) Expedition 306 Site U1313 during the late Pliocene and early Pleistocene, 3.68-2.45 million years ago (Ma). Before 3.1 Ma, SSTs in the mid-latitude North Atlantic were up to 6 °C higher than the present and surface water productivity was low, indicating that an intense NAC transported warm, nutrient-poor surface waters northwards. Starting at 3.1 Ma, surface water characteristics changed drastically as the NHG ... : Supplement to: Naafs, Bernhard David A; Stein, Ruediger; Hefter, Jens; Khélifi, Nabil; De Schepper, Stijn; Haug, Gerald H (2010): Late Pliocene changes in the North Atlantic Current. Earth and Planetary Science Letters, 298(3-4), 434-442 ... |
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