Citation:

S0012-821X(03)00556-9

Name: Age determination of ODP Hole 182-1127B (Table 1)
Published: 2003
License: https://creativecommons.org/licenses/by/3.0/

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

Abstract:

In Northern Hemisphere deglaciation records, the transition from the last glacial to the Holocene indicates a rapid return to near-glacial conditions during the Younger Dryas, whereas their Southern Hemisphere ice core counterparts record two separate cooling events: the Antarctic Cold Reversal and the Oceanic Cold Reversal. Spatial distribution and relative timing of these events in both hemispheres are central for our understanding of causes and mechanisms of abrupt climate change. To date, no marine record from the southern mid-latitudes conclusively demonstrates that the Younger Dryas was a significant event in the Southern Ocean. Here, we present high-resolution oxygen isotope and iron content records of a radiocarbon-dated sedimentary sequence from the Great Australian Bight, which constrains oceanic and atmospheric changes during the last deglaciation. Oxygen isotopes from planktonic foraminifera indicate two rapid cold reversals (between 13.1 and 11.1 kyr BP) separated by a brief warming. The sedimentary iron content, interpreted as a proxy for wind strength, indicates a simultaneous change in atmospheric circulation pattern. Both records demonstrate the existence of cooling events in the Southern Hemisphere, which are synchronous with the Northern Hemisphere Younger Dryas cold reversal (between 12.9 and 11.5 kyr BP). Such evidence for the spatial distribution and timing of abrupt climatic fluctuations is essential data for groundtruthing results derived from global climate models.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: -33.357500 * Longitude: 128.481280

Date/Time Start: 1998-10-30T21:30:00 * Date/Time End: 1998-11-03T01:45:00

Minimum DEPTH, sediment/rock: 6.90 m * Maximum DEPTH, sediment/rock: 9.55 m

Event(s):

182-1127B * Latitude: -33.357500 * Longitude: 128.481280 * Date/Time Start: 1998-10-30T21:30:00 * Date/Time End: 1998-11-03T01:45:00 * Elevation: -479.3 m * Penetration: 510.7 m * Recovery: 440.56 m * Location: Great Australian Bight * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 55 cores; 510.7 m cored; 0 m drilled; 86.3 % recovery

Comment:

All dates are based on monospecific samples of the planktonic foraminifer Globorotalia inflata measured at the Swiss Federal Institute of Technology AMS facility (Bonani et al., 1987, doi:10.1016/0168-583X(87)90210-2). 14C ages were converted into calendar ages using the Calib 4.3 program (http://radiocarbon.pa.qub.ac.uk/calib) and the marine calibration dataset MARINE 98 (Stuiver and Braziunas, 1993; Stuiver et al., 1998), which includes the 400-year correction for the ocean surface reservoir effect (Bard et al., 1984 doi:10.1016/0012-821X(94)90112-0). The local effect, the difference DeltaR (Stuiver and Braziunas, 1993) in reservoir age of the local region and the model ocean, is, on average, 61 +/- 29 years for the GAB region (Reimer and Reimer, 2001 http://www.calib.org).

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	Sample code/label	Sample label		Andres, Miriam S	DSDP/ODP/IODP sample designation
3	Sample code/label 2	Sample label 2		Andres, Miriam S
4	Age, dated	Age dated	ka	Andres, Miriam S	Age, 14C AMS
5	Age, dated standard deviation	Age dated std dev	±	Andres, Miriam S	Age, 14C AMS
6	Age, maximum/old	Age max	ka	Hardy, Iris A	Age, 14C calibrated	Calibrated age range
7	Age, minimum/young	Age min	ka	Hardy, Iris A	Age, 14C calibrated	Calibrated age range

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

48 data points

Data

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

1 Depth sed [m]	2 Sample label	3 Sample label 2	4 Age dated [ka]	5 Age dated std dev [±]	6 Age max [ka]	7 Age min [ka]
6.90	182-1127B-2H-1,100-103	ETH-24364	9.515	0.110	10.581	9.717
7.42	182-1127B-2H-2,2-7	ETH-24363	9.875	0.090	11.148	10.244
7.90	182-1127B-2H-2,50-55	ETH-23922	10.135	0.105	11.601	10.360
8.41	182-1127B-2H-2,101-107	ETH-23892	10.930	0.090	12.881	11.498
8.55	182-1127B-2H-2,115-119	ETH-25860	11.340	0.085	13.741	12.417
8.75	182-1127B-2H-2,135-139	ETH-25861	11.750	0.085	13.777	12.974
9.40	182-1127B-2H-3,50-55	ETH-24290	14.420	0.095	17.162	16.133
9.55	182-1127B-2H-3,65-69	ETH-25862	14.920	0.085	17.758	16.698