Marchitto, Thomas M; Bryan, Sean P; Curry, William B; McCorkle, Daniel C (2007): (Table 1) Mg/Ca ratios of Cibicidoides pachyderma and age determination of core top sediments from the Florida Straits [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.833163, Supplement to: Marchitto, TM et al. (2007): Mg/Ca temperature calibration for the benthic foraminifer Cibicidoides pachyderma. Paleoceanography, 22(1), PA1203, https://doi.org/10.1029/2006PA001287
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Abstract:
The recent development of foraminiferal Mg/Ca as a paleotemperature proxy has enabled the extraction of global ice volume and local salinity from the more traditional paleotemperature proxy d18O. The benthic foraminiferal genus Cibicidoides is widely used in paleoceanographic reconstructions because of its epifaunal habitat and cosmopolitan distribution, and it has received early attention in Mg/Ca work. However, existing temperature calibrations for Cibicidoides rely heavily on C. pachyderma core top data from one location, Little Bahamas Bank, where authigenic processes and/or reworking may result in elevated warm water Mg/Ca values. Here we present new C. pachyderma Mg/Ca data from a series of 29 high-quality multicore tops collected in the Florida Straits, spanning a temperature range of 5.8-18.6°C. In contrast to previous calibrations, we find no evidence for a strongly exponential response to temperature. The data are best explained by a linear relationship, with a sensitivity of 0.12 mmol/mol per °C.
Further details:
Lund, David C (2005): Gulf stream temperature, salinity, and transport during the last millennium. Ph.D. thesis, Massachusetts Institute of Technology, Cambridge, Massachusetts, 256 pp
Lund, David C; Curry, William B (2004): Late Holocene variability in Florida Current surface density: Patterns and possible causes. Paleoceanography, 19(4), PA4001, https://doi.org/10.1029/2004PA001008
Lund, David C; Curry, William B (2006): Florida Current surface temperature and salinity variability during the last millennium. Paleoceanography, 21(2), PA2009, https://doi.org/10.1029/2005PA001218
Coverage:
Median Latitude: 24.379845 * Median Longitude: -80.794910 * South-bound Latitude: 23.261800 * West-bound Longitude: -83.377300 * North-bound Latitude: 24.836000 * East-bound Longitude: -79.083500
Date/Time Start: 2002-01-09T00:00:00 * Date/Time End: 2002-01-23T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
KNR166-2-5 * Latitude: 24.396800 * Longitude: -83.377300 * Date/Time: 2002-01-09T00:00:00 * Elevation: -447.0 m * Recovery: 0.48 m * Location: Florida Strait * Campaign: KNR166-2 (KN166-2) * Basis: Knorr * Method/Device: MultiCorer (MUC)
KNR166-2-11 * Latitude: 24.219700 * Longitude: -83.295800 * Date/Time: 2002-01-09T00:00:00 * Elevation: -751.0 m * Recovery: 0.25 m * Location: Florida Strait * Campaign: KNR166-2 (KN166-2) * Basis: Knorr * Method/Device: MultiCorer (MUC)
KNR166-2-13 * Latitude: 24.366800 * Longitude: -83.236600 * Date/Time: 2002-01-09T00:00:00 * Elevation: -348.0 m * Recovery: 0.41 m * Location: Florida Strait * Campaign: KNR166-2 (KN166-2) * Basis: Knorr * Method/Device: MultiCorer (MUC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 6 | Bottom water temperature | BWT | °C | Marchitto, Thomas M | Estimated | by matching bottle (or estimated) salinities to nearby CTD casts |
| 7 | Salinity | Sal | Marchitto, Thomas M | |||
| 8 | Δ carbonate ion content | Δ[CO3]2- | µmol/kg | Marchitto, Thomas M | ||
| 9 | Cibicidoides pachyderma, Magnesium/Calcium ratio | C. pachyderma Mg/Ca | mmol/mol | Marchitto, Thomas M | Inductively coupled plasma - mass spectrometry (ICP-MS) | size fraction >250 µm |
| 10 | Magnesium/Calcium ratio, standard deviation | Mg/Ca std dev | ± | Marchitto, Thomas M | Inductively coupled plasma - mass spectrometry (ICP-MS) | size fraction >250 µm |
| 11 | Age, dated | Age dated | ka | Marchitto, Thomas M | Age, 14C AMS | Globigerinoides ruber (>250 µm); >0.001 refers to fraction modern, indicationg the presence of 14C from nuclear weapons testing |
| 12 | Age, dated standard deviation | Age dated std dev | ± | Marchitto, Thomas M | Age, 14C AMS | Globigerinoides ruber (>250 µm) |
| 13 | Laboratory code/label | Lab label | Marchitto, Thomas M | |||
| 14 | Reference/source | Reference | Marchitto, Thomas M |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
182 data points