Citation:

2003PA000979

Name: (Table 1) Age determination of sediment core JT96-09PC
Published: 2005
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

he oxygen minimum zone (OMZ) off Vancouver Island was more oxygen depleted relative to modern conditions during the Allerød (~13.5 to 12.6 calendar kyr) and again from ~11 to 10 kyr. The timing of OMZ intensification is similar to that seen throughout the North Pacific, although the onset appears to have been delayed by ~1500 years off Vancouver Island. Radiocarbon dating of coeval benthic and planktonic foraminifera shows that between 16.0 and 12.6 kyr the age contrast between surface and intermediate waters (920 m depth) off Vancouver Island was similar to, or slightly less than, that today. There is no evidence of an increased age difference (i.e., decreased ventilation) during the deglaciation, particularly during the Allerød. However, sedimentary marine organic carbon concentration and mass accumulation rate increased substantially in the Allerød, suggesting that increased organic matter export was the principal cause of late Pleistocene OMZ intensification off Vancouver Island.

Coverage:

Latitude: 48.911700 * Longitude: -126.890000

Minimum DEPTH, sediment/rock: 0.475 m * Maximum DEPTH, sediment/rock: 3.465 m

Event(s):

JT96-09PC (JT96-09) * Latitude: 48.911700 * Longitude: -126.890000 * Elevation: -920.0 m * Method/Device: Gravity corer (GC)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	Calendar age	Cal age	ka BP	McKay, Jennifer L	Age, 14C calibrated	A reservoir age of 800 years was applied to samples between 47.5 and 102.5 m, and 1100 years to ages below 112.5 m
3	Age, dated	Age dated	ka	McKay, Jennifer L	Age, 14C AMS	mixed planktonic foraminifera
4	Age, dated standard deviation	Age dated std dev	±	McKay, Jennifer L	Age, 14C AMS	mixed planktonic foraminifera
5	Age, dated	Age dated	ka	McKay, Jennifer L	Age, 14C AMS	Uvigerina
6	Age, dated standard deviation	Age dated std dev	±	McKay, Jennifer L	Age, 14C AMS	Uvigerina
7	Age, dated	Age dated	ka	McKay, Jennifer L	Age, 14C AMS	Bolivina
8	Age, dated standard deviation	Age dated std dev	±	McKay, Jennifer L	Age, 14C AMS	Bolivina
9	Age, difference	Age diff	ka	McKay, Jennifer L	Calculated	benthic-planktonic. #1
10	Age, difference error	Age diff e	±	McKay, Jennifer L	Calculated	benthic-planktonic. #1
11	Age, difference	Age diff	ka	McKay, Jennifer L	Calculated	benthic-planktonic. #2
12	Age, difference error	Age diff e	±	McKay, Jennifer L	Calculated	benthic-planktonic. #2

License:

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

Size:

65 data points

Data

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

1 Depth sed [m]	2 Cal age [ka BP] (A reservoir age of 800 years ...)	3 Age dated [ka] (mixed planktonic foraminifera...)	4 Age dated std dev [±] (mixed planktonic foraminifera...)	5 Age dated [ka] (Uvigerina, Age, 14C AMS)	6 Age dated std dev [±] (Uvigerina, Age, 14C AMS)	7 Age dated [ka] (Bolivina, Age, 14C AMS)	8 Age dated std dev [±] (Bolivina, Age, 14C AMS)	9 Age diff [ka] (benthic-planktonic. #1, Calcu...)	10 Age diff e [±] (benthic-planktonic. #1, Calcu...)	11 Age diff [ka] (benthic-planktonic. #2, Calcu...)	12 Age diff e [±] (benthic-planktonic. #2, Calcu...)
0.475	10.03	9.76	0.07	10.71	0.06	10.65	0.09	0.95	0.092	0.89	0.114
0.575		9.36	0.24			10.91	0.07	1.55	0.250
0.775	12.24	11.21	0.12
0.875	12.73	11.50	0.11			12.11	0.08	0.61	0.136
1.025	12.84	11.60	0.08
1.125	13.17	12.46	0.12			13.17	0.10	0.71	0.156
1.425	13.43	12.64	0.09			13.50	0.08	0.86	0.120
2.615	14.14	13.41	0.08	14.29	0.11			0.88	0.136
2.865	14.30	13.52	0.07	14.35	0.12			0.83	0.139
3.465	15.57	14.14	0.07	14.83	0.28			0.68	0.289