McKay, Jennifer L; Pedersen, Thomas F; Southon, John (2005): (Table 1) Age determination of sediment core JT96-09PC [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.835312, Supplement to: McKay, JL et al. (2005): Intensification of the oxygen minimum zone in the northeast Pacific off Vancouver Island during the last deglaciation: Ventilation and/or export production? Paleoceanography, 20(4), PA4002, https://doi.org/10.1029/2003PA000979
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Abstract:
he oxygen minimum zone (OMZ) off Vancouver Island was more oxygen depleted relative to modern conditions during the Allerød (~13.5 to 12.6 calendar kyr) and again from ~11 to 10 kyr. The timing of OMZ intensification is similar to that seen throughout the North Pacific, although the onset appears to have been delayed by ~1500 years off Vancouver Island. Radiocarbon dating of coeval benthic and planktonic foraminifera shows that between 16.0 and 12.6 kyr the age contrast between surface and intermediate waters (920 m depth) off Vancouver Island was similar to, or slightly less than, that today. There is no evidence of an increased age difference (i.e., decreased ventilation) during the deglaciation, particularly during the Allerød. However, sedimentary marine organic carbon concentration and mass accumulation rate increased substantially in the Allerød, suggesting that increased organic matter export was the principal cause of late Pleistocene OMZ intensification off Vancouver Island.
Coverage:
Latitude: 48.911700 * Longitude: -126.890000
Minimum DEPTH, sediment/rock: 0.475 m * Maximum DEPTH, sediment/rock: 3.465 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Calendar age | Cal age | ka BP | McKay, Jennifer L | Age, 14C calibrated | A reservoir age of 800 years was applied to samples between 47.5 and 102.5 m, and 1100 years to ages below 112.5 m |
| 3 | Age, dated | Age dated | ka | McKay, Jennifer L | Age, 14C AMS | mixed planktonic foraminifera |
| 4 | Age, dated standard deviation | Age dated std dev | ± | McKay, Jennifer L | Age, 14C AMS | mixed planktonic foraminifera |
| 5 | Age, dated | Age dated | ka | McKay, Jennifer L | Age, 14C AMS | Uvigerina |
| 6 | Age, dated standard deviation | Age dated std dev | ± | McKay, Jennifer L | Age, 14C AMS | Uvigerina |
| 7 | Age, dated | Age dated | ka | McKay, Jennifer L | Age, 14C AMS | Bolivina |
| 8 | Age, dated standard deviation | Age dated std dev | ± | McKay, Jennifer L | Age, 14C AMS | Bolivina |
| 9 | Age, difference | Age diff | ka | McKay, Jennifer L | Calculated | benthic-planktonic. #1 |
| 10 | Age, difference error | Age diff e | ± | McKay, Jennifer L | Calculated | benthic-planktonic. #1 |
| 11 | Age, difference | Age diff | ka | McKay, Jennifer L | Calculated | benthic-planktonic. #2 |
| 12 | Age, difference error | Age diff e | ± | McKay, Jennifer L | Calculated | benthic-planktonic. #2 |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
65 data points