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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):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Laboratory code/labelLab labelFarmer, E ChristaCAMS ID
2 Sample code/labelSample labelFarmer, E ChristaDSDP/ODP/IODP sample designation
3 DEPTH, sediment/rockDepth sedmGeocode
4 Age, datedAge datedkaFarmer, E ChristaAge, 14C AMS
5 Age, dated standard errorAge std e±Farmer, E ChristaAge, 14C AMS1 sigma
6 Calendar age, maximum/oldCal age maxka BPFarmer, E ChristaAge, 14C calibrated1 sigmar error
7 Calendar age, minimum/youngCal age minka BPFarmer, E ChristaAge, 14C calibrated1 sigmar error
8 Calendar age, maximum/oldCal age maxka BPFarmer, E ChristaAge, 14C calibrated2 sigma error
9 Calendar age, minimum/youngCal age minka BPFarmer, E ChristaAge, 14C calibrated2 sigma error
10 Calendar ageCal ageka BPFarmer, E ChristaAge, 14C calibratedinterpolated
11 Age, commentCommFarmer, E Christa
12 Sedimentation rateSRcm/kaFarmer, E Christa
13 DurationDurationkaFarmer, E ChristaAverage Time Step,l yrs/cm
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
160 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Lab label
(CAMS ID)		2 
Sample label
(DSDP/ODP/IODP sample designation)		3 
Depth sed [m]		4 
Age dated [ka]
(Age, 14C AMS)		5 
Age std e [±]
(1 sigma, Age, 14C AMS)		6 
Cal age max [ka BP]
(1 sigmar error, Age, 14C cali...)		7 
Cal age min [ka BP]
(1 sigmar error, Age, 14C cali...)		8 
Cal age max [ka BP]
(2 sigma error, Age, 14C calib...)		9 
Cal age min [ka BP]
(2 sigma error, Age, 14C calib...)		10 
Cal age [ka BP]
(interpolated, Age, 14C calibr...)		11 
Comm		12 
SR [cm/ka]		13 
Duration [ka]
(Average Time Step,l yrs/cm)
85026175-1084B-1H-1,210.2151.8200.0951.2441.0531.3030.9461.053endpoints of interpolated intervals
85027175-1084B-1H-1,310.3152.9500.0792.5472.3212.6962.2792.588
85028175-1084B-1H-1,470.4755.0700.0685.2485.0435.3034.9285.043endpoints of interpolated intervals6.50.153
85029175-1084B-1H-1,590.5956.1300.0796.4006.2476.4816.1666.365
85030175-1084B-1H-1,770.7758.1950.0718.4978.3498.5928.2828.349endpoints of interpolated intervals9.10.110
85031175-1084B-1H-1,930.9458.9350.0719.4169.0119.7398.9609.312
85032175-1084B-1H-1,1071.0459.7150.06810.3079.87910.5699.8339.879endpoints of interpolated intervals17.60.057
85033175-1084B-1H-1,1311.28510.0400.07910.79710.32211.11710.29111.117endpoints of interpolated intervals19.40.052
85034175-1084B-1H-2,11.48511.0400.10312.60311.74512.80811.49911.884
85035175-1084B-1H-2,251.72510.9900.11212.57611.70212.80411.38912.804endpoints of interpolated intervals26.10.038
85036175-1084B-1H-2,552.02513.1050.07115.18514.13915.35114.12014.120endpoints of interpolated intervals22.80.044
85037175-1084B-1H-2,732.20513.2400.15815.31714.31115.52314.13414.881
85038175-1084B-1H-2,1052.52514.5500.23616.93916.23517.29815.90816.235endpoints of interpolated intervals23.60.042
90228175-1084B-1H-2,1292.76515.9200.31418.61017.71719.06417.30917.418
90229175-1084B-1H-3,433.40518.4300.31421.53120.57222.01420.12120.572endpoints of interpolated intervals20.30.049