Swann, George E A; Kendrick, Christopher P; Dickson, Alexander J; Worne, Savannah (2018): Diatom carbon isotope data and CO2 reconstruction from ODP Site 145-882 through the late Pliocene [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.889751, Supplement to: Swann, GEA et al. (2018): Late Pliocene Marine ρCO₂ Reconstructions From the Subarctic Pacific Ocean. Paleoceanography and Paleoclimatology, 33(5), 457-469, https://doi.org/10.1029/2017PA003296
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Abstract:
The development of large ice-sheets across the Northern Hemisphere during the late Pliocene and the emergence of the glacial-interglacial cycles that punctuate the Quaternary mark a significant threshold in Earth's climate history. Although a number of different mechanisms have been proposed to initiate this cooling and the onset of major Northern Hemisphere glaciation, reductions in atmospheric concentrations of CO2 likely played a key role. The emergence of a stratified (halocline) water column in the subarctic north-west Pacific Ocean at 2.73 Ma has often been interpreted as an event which would have limited oceanic ventilation of CO2 to the atmosphere, thereby helping to cool the global climate system. Here, diatom carbon isotopes (δ13Cdiatom) are used to reconstruct changes in regional carbon dynamics through this interval. Results show that the development of a salinity stratification did not fundamental alter the net oceanic/atmospheric flux of CO2 in the subarctic north-west Pacific Ocean through the late Pliocene/early Quaternary. These results provide further insights into the long-term controls on global carbon cycling and the role of the subarctic Pacific Ocean in instigating global climatic changes.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 50.363300 * Median Longitude: 167.599800 * South-bound Latitude: 50.363300 * West-bound Longitude: 167.599600 * North-bound Latitude: 50.363300 * East-bound Longitude: 167.600000
Date/Time Start: 1992-07-08T10:30:00 * Date/Time End: 1992-08-08T17:30:00
Minimum Elevation: -3255.0 m * Maximum Elevation: -3255.0 m
Event(s):
145-882A * Latitude: 50.363300 * Longitude: 167.600000 * Date/Time Start: 1992-08-05T17:45:00 * Date/Time End: 1992-07-08T10:30:00 * Elevation: -3255.0 m * Penetration: 398.3 m * Recovery: 411.2 m * Location: North Pacific Ocean * Campaign: Leg145 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 42 cores; 398.3 m cored; 0 m drilled; 103.2 % recovery
145-882B * Latitude: 50.363300 * Longitude: 167.599600 * Date/Time Start: 1992-08-07T10:30:00 * Date/Time End: 1992-08-08T17:30:00 * Elevation: -3255.0 m * Penetration: 270.4 m * Recovery: 280.9 m * Location: North Pacific Ocean * Campaign: Leg145 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 29 cores; 270.4 m cored; 0 m drilled; 103.9 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Swann, George E A | |||
| 2 | Sample code/label | Sample label | Swann, George E A | |||
| 3 | AGE | Age | ka BP | Swann, George E A | Geocode | |
| 4 | δ13C, diatom-bound organic matter | δ13C DB | ‰ PDB | Swann, George E A | ||
| 5 | Coscinodiscus marginatus | C. marginatus | % | Swann, George E A | ||
| 6 | Coscinodiscus radiatus | C. radiatus | % | Swann, George E A | ||
| 7 | Diatoms, other | Diatom oth | % | Swann, George E A | ||
| 8 | Carbon dioxide, partial pressure | pCO2 | µatm | Swann, George E A | aquatic | |
| 9 | Carbon dioxide, partial pressure, standard deviation | pCO2 std dev | ± | Swann, George E A | aquatic, 1 sigma uncertainty |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
217 data points
Data
| 1 Event | 2 Sample label | 3 Age [ka BP] | 4 δ13C DB [‰ PDB] | 5 C. marginatus [%] | 6 C. radiatus [%] | 7 Diatom oth [%] | 8 pCO2 [µatm] | 9 pCO2 std dev [±] |
|---|---|---|---|---|---|---|---|---|
| 145-882A | 145-882A-11H-2W,24-28 | 2553 | -19.2 | 3.4 | 96.4 | 0.2 | 197.1 | 46.8 |
| 145-882A | 145-882A-11H-2W,122-126 | 2583 | -17.8 | 18.1 | 80.6 | 1.3 | 191.8 | 40.3 |
| 145-882A | 145-882A-11H-2W,136-140 | 2586 | -19.0 | 67.3 | 32.2 | 0.6 | 214.0 | 41.6 |
| 145-882A | 145-882A-11H-3W,12-16 | 2593 | -19.5 | 6.3 | 93.1 | 0.6 | 228.3 | 43.0 |
| 145-882A | 145-882A-11H-4W,84-88 | 2648 | -20.8 | 9.9 | 90.1 | 0.0 | 275.6 | 58.5 |
| 145-882A | 145-882A-11H-4W,142-144 | 2665 | -14.7 | 34.2 | 65.8 | 0.0 | 214.5 | 46.9 |
| 145-882A | 145-882A-11H-5W,7-9 | 2670 | -14.5 | 47.9 | 52.2 | 0.0 | 199.2 | 46.6 |
| 145-882A | 145-882A-11H-5W,54-58 | 2680 | -16.7 | 25.3 | 71.9 | 2.8 | 252.6 | 48.6 |
| 145-882A | 145-882A-11H-5W,108-112 | 2689 | -18.0 | 24.4 | 74.3 | 1.3 | 257.2 | 51.0 |
| 145-882A | 145-882A-11H-5W,137-141 | 2695 | -19.4 | 37.7 | 61.3 | 1.0 | 228.6 | 53.5 |
| 145-882A | 145-882A-11H-6W,76-80 | 2712 | -15.9 | 17.4 | 73.5 | 9.1 | 195.0 | 43.2 |
| 145-882A | 145-882A-11H-6W,84-88 | 2713 | -19.8 | 28.6 | 61.6 | 9.8 | 250.5 | 55.8 |
| 145-882B | 145-882B-12H-3W,58-62 | 2735 | -14.6 | 91.4 | 8.3 | 0.3 | 228.4 | 33.0 |
| 145-882B | 145-882B-12H-3W,117-121 | 2740 | -13.9 | 88.3 | 11.6 | 0.1 | 191.5 | 29.4 |
| 145-882B | 145-882B-12H-3W,146-150 | 2743 | -13.9 | 98.3 | 1.3 | 0.4 | 220.0 | 31.5 |
| 145-882A | 145-882A-12H-1W,84-88 | 2748 | -13.5 | 96.0 | 2.5 | 1.6 | 245.3 | 35.1 |
| 145-882A | 145-882A-12H-2W,54-58 | 2760 | -14.7 | 71.3 | 28.2 | 0.5 | 239.7 | 32.4 |
| 145-882A | 145-882A-12H-2W,108-112 | 2765 | -12.9 | 98.5 | 1.5 | 0.1 | 235.3 | 30.2 |
| 145-882A | 145-882A-12H-3W,25-29 | 2772 | -15.3 | 92.1 | 7.9 | 0.0 | 254.1 | 35.2 |
| 145-882A | 145-882A-12H-3W,85-89 | 2778 | -13.7 | 96.6 | 2.9 | 0.5 | 241.0 | 31.7 |
| 145-882A | 145-882A-12H-3W,87-91 | 2778 | -14.7 | 93.8 | 5.3 | 1.0 | 251.3 | 33.4 |
| 145-882A | 145-882A-12H-4W,54-58 | 2789 | -14.0 | 93.4 | 6.1 | 0.5 | 252.7 | 34.7 |
| 145-882A | 145-882A-12H-4W,108-112 | 2793 | -13.7 | 97.6 | 2.5 | 0.0 | 263.9 | 33.9 |
| 145-882A | 145-882A-12H-5W,23-27 | 2797 | -14.0 | 95.1 | 4.6 | 0.3 | 241.8 | 33.7 |
| 145-882A | 145-882A-12H-5W,54-58 | 2799 | -14.5 | 88.5 | 11.0 | 0.5 | 238.4 | 32.9 |
| 145-882A | 145-882A-12H-5W,84-88 | 2802 | -14.0 | 96.1 | 3.4 | 0.5 | 249.3 | 33.9 |
| 145-882A | 145-882A-12H-5W,144-148 | 2806 | -13.7 | 96.6 | 3.4 | 0.0 | 237.7 | 33.4 |
| 145-882A | 145-882A-12H-6W,54-58 | 2810 | -13.8 | 69.8 | 20.9 | 9.3 | 246.7 | 34.6 |
| 145-882B | 145-882B-13H-2W,128-132 | 2815 | -14.4 | 86.3 | 7.1 | 6.6 | 314.3 | 41.4 |
| 145-882B | 145-882B-13H-4W,68-72 | 2834 | -14.7 | 92.8 | 6.3 | 1.0 | 268.5 | 38.1 |
| 145-882A | 145-882A-13H-2W,77-81 | 2847 | -15.0 | 93.6 | 4.4 | 2.0 | 280.4 | 40.9 |