Swann, George E A (2010): Stable oxygen isotope ratios of diatoms and relative species abundances in ODP Site 145-882 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.772032, Supplement to: Swann, GEA (2010): Salinity changes in the North West Pacific Ocean during the late Pliocene/early Quaternary from 2.73 Ma to 2.52 Ma. Earth and Planetary Science Letters, 297(1-2), 332-338, https://doi.org/10.1016/j.epsl.2010.06.035
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Abstract:
Recent research has increasingly advocated a role for the North Pacific Ocean in modulating global climatic changes over both the last glacial cycle and further back into the geological record. Here a diatom d18O record is presented from Ocean Drilling Program Site 882 over the Pliocene/Quaternary boundary from 2.73 Ma to 2.52 Ma (MIS G6–MIS 99). Large changes in d18Odiatom of c. 4 per mil from 2.73 Ma onwards are documented to occur on a timeframe broadly coinciding with glacial–interglacial cycles. These changes are primarily attributed to large scale inputs of meltwater from glacials surrounding the North Pacific Basin and the Bering Sea. Despite these inputs and associated change in surface water salinity, on the basis of existing opal and UK37 temperature data and new modelled water column densities, no evidence exists to suggests a removal of the halocline stratification or a resumption of the high productivity system similar to that which prevailed prior to 2.73 Ma. The permanence of the halocline suggests that the region played a key role in driving global climatic changes over the early glacial–interglacial cycles that followed the onset of major Northern Hemisphere Glaciation by inhibiting deep water upwelling and ventilation of CO2 to the atmosphere.
Related to:
Swann, George E A; Maslin, Mark; Leng, Melanie J; Sloane, Hilary J; Haug, Gerald H (2006): Diatom d18O evidence for the development of the modern halocline system in the subarctic northwest Pacific at the onset of major Northern Hemisphere glaciation. Paleoceanography, 21, PA1009, https://doi.org/10.1029/2005PA001147
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 50.363300 * Longitude: 167.599800
Date/Time Start: 1992-08-05T00:00:00 * Date/Time End: 1992-08-08T00:00:00
Minimum Elevation: -3255.0 m * Maximum Elevation: -3255.0 m
Event(s):
145-882 * Latitude: 50.363300 * Longitude: 167.599800 * Date/Time Start: 1992-08-05T00:00:00 * Date/Time End: 1992-08-08T00:00:00 * Elevation: -3255.0 m * Penetration: 668.7 m * Recovery: 692.1 m * Location: North Pacific Ocean * Campaign: Leg145 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 71 cores; 668.7 m cored; 0 m drilled; 103.5% recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Swann, George E A | DSDP/ODP/IODP sample designation | ||
| 2 | AGE | Age | ka BP | Geocode | ||
| 3 | Diatoms, δ18O | Diatoms δ18O | ‰ SMOW | Swann, George E A | Mass spectrometer, Finnigan, MAT 253 | |
| 4 | Coscinodiscus marginatus | C. marginatus | % | Swann, George E A | ||
| 5 | Coscinodiscus radiatus | C. radiatus | % | Swann, George E A | ||
| 6 | Diatoms, other | Diatom oth | % | Swann, George E A | ||
| 7 | Reference of data | Ref data | Swann, George E A |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
354 data points