McManus, Jerry F; Oppo, Delia W; Cullen, James L (1999): Stable carbon and oxygen isotope ratios of Cibicidoides wuellerstorfi in the 340 to 0 kyr section of ODP Site 162-980 in the subpolar North Atlantic [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.700818, Supplement to: McManus, JF et al. (1999): A 0.5-million-year record of millennial-scale climate variability in the North Atlantic. Science, 283(5404), 971-975, https://doi.org/10.1126/science.283.5404.971
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Abstract:
Long, continuous, marine sediment records from the subpolar North Atlantic document the glacial modulation of regional climate instability throughout the past 0.5 million years. Whenever ice sheet size surpasses a critical threshold indicated by the benthic oxygen isotope (delta18O) value of 3.5 per mil during each of the past five glaciation cycles, indicators of iceberg discharge and sea-surface temperature display dramatically larger amplitudes of millennial-scale variability than when ice sheets are small. Sea-surface temperature oscillations of 1° to 2°C increase in size to approximately 4° to 6°C, and catastrophic iceberg discharges begin alternating repeatedly with brief quiescent intervals. The glacial growth associated with this amplification threshold represents a relatively small departure from the modern ice sheet configuration and sea level. Instability characterizes nearly all observed climate states, with the exception of a limited range of baseline conditions that includes the current Holocene interglacial.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 55.484933 * Longitude: -14.702267
Date/Time Start: 1995-07-10T00:00:00 * Date/Time End: 1995-07-11T00:00:00
Minimum DEPTH, sediment/rock: 0.01 m * Maximum DEPTH, sediment/rock: 44.81 m
Event(s):
162-980 * Latitude: 55.484933 * Longitude: -14.702267 * Date/Time Start: 1995-07-10T00:00:00 * Date/Time End: 1995-07-11T00:00:00 * Elevation: -2180.0 m * Penetration: 353.7 m * Recovery: 366.7 m * Location: South Atlantic Ocean * Campaign: Leg162 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 39 cores; 353.7 m cored; 0 m drilled; 103.7% recovery
Comment:
Depth is composite depth (mcd). For the 500 to 340 kyr section see Oppo et al., (1998) data set: doi:10.1594/PANGAEA.698998
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | AGE | Age | ka BP | Geocode | ||
| 3 | Cibicidoides wuellerstorfi, δ13C | C. wuellerstorfi δ13C | ‰ PDB | McManus, Jerry F | Mass spectrometer Finnigan MAT 252 | 1-3 specimens |
| 4 | Cibicidoides wuellerstorfi, δ18O | C. wuellerstorfi δ18O | ‰ PDB | McManus, Jerry F | Mass spectrometer Finnigan MAT 252 | 1-3 specimens |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
652 data points