Farmer, E Christa; deMenocal, Peter B; Marchitto, Thomas M (2005): (Table 1) Age determination of ODP Hole 175-1084B [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.836843, Supplement to: Farmer, EC et al. (2005): Holocene and deglacial ocean temperature variability in the Benguela upwelling region: Implications for low-latitude atmospheric circulation. Paleoceanography, 20(2), PA2018, https://doi.org/10.1029/2004PA001049
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Abstract:
Mg/Ca analyses of G. bulloides and abundances of N. pachyderma (left coiling) from Ocean Drilling Program (ODP) Leg 175 Hole 1084B in the Benguela coastal upwelling system document lower sea surface temperatures during the Last Glacial Maximum (LGM), Younger Dryas, mid-Holocene, and Little Ice Age in the southeastern Atlantic. Taking into consideration the possible effects of differential carbonate dissolution, the Mg/Ca data indicate Younger Dryas temperatures 2°-3°C cooler than those of the early Holocene and LGM temperatures 4°-5°C cooler than those of the early Holocene. The cool interval during the deglacial period at Hole 1084B matches the timing of Younger Dryas shifts in Cariaco Basin and Greenland Ice Sheet records and that of a nearby alkenone record. Comparison of mid-Holocene cooling at Hole ODP1084B with other high-resolution records of Holocene and last deglacial sea surface temperatures from the tropical Atlantic implies consistent basin-wide changes in atmospheric circulation. A brief period of 1.5°-2°C cooling between 17.8 and 17.2 ka, if related to Heinrich event 1, is consistent with a previously hypothesized tropical origin of all Heinrich climate change events.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -25.513660 * Longitude: 13.027750
Date/Time Start: 1997-09-24T03:15:00 * Date/Time End: 1997-09-24T17:50:00
Minimum DEPTH, sediment/rock: 0.215 m * Maximum DEPTH, sediment/rock: 3.405 m
Event(s):
175-1084B * Latitude: -25.513660 * Longitude: 13.027750 * Date/Time Start: 1997-09-24T03:15:00 * Date/Time End: 1997-09-24T17:50:00 * Elevation: -1992.8 m * Penetration: 182.8 m * Recovery: 186.6 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 20 cores; 182.8 m cored; 0 m drilled; 102.1 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Laboratory code/label | Lab label | Farmer, E Christa | CAMS ID | ||
| 2 | Sample code/label | Sample label | Farmer, E Christa | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | Age, dated | Age dated | ka | Farmer, E Christa | Age, 14C AMS | |
| 5 | Age, dated standard error | Age std e | ± | Farmer, E Christa | Age, 14C AMS | 1 sigma |
| 6 | Calendar age, maximum/old | Cal age max | ka BP | Farmer, E Christa | Age, 14C calibrated | 1 sigmar error |
| 7 | Calendar age, minimum/young | Cal age min | ka BP | Farmer, E Christa | Age, 14C calibrated | 1 sigmar error |
| 8 | Calendar age, maximum/old | Cal age max | ka BP | Farmer, E Christa | Age, 14C calibrated | 2 sigma error |
| 9 | Calendar age, minimum/young | Cal age min | ka BP | Farmer, E Christa | Age, 14C calibrated | 2 sigma error |
| 10 | Calendar age | Cal age | ka BP | Farmer, E Christa | Age, 14C calibrated | interpolated |
| 11 | Age, comment | Comm | Farmer, E Christa | |||
| 12 | Sedimentation rate | SR | cm/ka | Farmer, E Christa | ||
| 13 | Duration | Duration | ka | Farmer, E Christa | Average Time Step,l yrs/cm |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
160 data points