Pearson, Ann; Eglinton, Timothy Ian; McNichol, Ann P (2000): (Table 2) Delta 14C record of sediment core Pulse-32_SMB [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.855281, Supplement to: Pearson, A et al. (2000): An organic tracer for surface ocean radiocarbon. Paleoceanography, 15(5), 541-550, https://doi.org/10.1029/1999PA000476
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Abstract:
The D14C of surface water dissolved inorganic carbon (DIC) in the Southern California Bight was compared to D14C as recorded by the sterols in Santa Monica and Santa Barbara Basin sediments. All of the C26, C27, C28, and C29 sterols as well as dinosterol had 14C concentrations equal to surface water DIC, indicating that all of the major sterols were derived from phytoplanktonic production. There is no detectable terrestrial component. Their tracer capability was confirmed by comparing the “bomb 14C”-derived change in surface water D14CDIC with the change in D14Csterol. The “prebomb” D14CDIC was -82 per mil, and prebomb sterols averaged -75±19 per mil. The D14C value in 1996 was +71 per mil. Eighteen measurements representing eight different sterols from the sediment-water interface of both Santa Monica and Santa Barbara Basins averaged +62±23 per mil. When three of these values were eliminated because of suspected contamination, the remaining data averaged +71 ±12 per mil. The entire compound class could serve as an excellent proxy for the 14C concentration of ocean surface waters.
Coverage:
Latitude: 33.733300 * Longitude: -118.833300
Minimum DEPTH, sediment/rock: 0.00375 m * Maximum DEPTH, sediment/rock: 0.05000 m
Event(s):
Comment:
D14C values of surface water at 20 m depth: 71±3 per mil.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Pearson, Ann | Geocode | |
| 2 | Depth, top/min | Depth top | m | Pearson, Ann | sediment | |
| 3 | Depth, bottom/max | Depth bot | m | Pearson, Ann | sediment | |
| 4 | Δ14C | Δ14C | ‰ | Pearson, Ann | total organic carbon | |
| 5 | Δ14C, standard deviation | Δ14C std dev | ± | Pearson, Ann | total organic carbon | |
| 6 | Δ14C | Δ14C | ‰ | Pearson, Ann | Neogloboquadrina sp. | |
| 7 | Δ14C, standard deviation | Δ14C std dev | ± | Pearson, Ann | Neogloboquadrina sp. | |
| 8 | Δ14C | Δ14C | ‰ | Pearson, Ann | Bolivina spp. | |
| 9 | Δ14C, standard deviation | Δ14C std dev | ± | Pearson, Ann | Bolivina spp. | |
| 10 | Δ14C | Δ14C | ‰ | Pearson, Ann | Uvigerina peregrina | |
| 11 | Δ14C, standard deviation | Δ14C std dev | ± | Pearson, Ann | Uvigerina peregrina |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
54 data points