Citation:

2000PA000538

Name: Calcium carbonate and stable isotope composition of sediment core RC13-110
Published: 2002
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Stable isotopes in benthic foraminifera from Pacific sediments are used to assess hypotheses of systematic shifts in the depth distribution of oceanic nutrients and carbon during the ice ages. The carbon isotope differences between ~1400 and ~3200 m depth in the eastern Pacific are consistently greater in glacial than interglacial maxima over the last ~370 kyr. This phenomenon of "bottom heavy" glacial nutrient distributions, which Boyle proposed as a cause of Pleistocene CO2 change, occurs primarily in the 1/100 and 1/41 kyr**-1 "Milankovitch" orbital frequency bands but appears to lack a coherent 1/23 kyr**-1 band related to orbital precession. Averaged over oxygen-isotope stages, glacial delta13C gradients from ~1400 to ~3200 m depth are 0.1 per mil greater than interglacial gradients. The range of extreme shifts is somewhat larger, 0.2 to 0.5 per mil . In both cases, these changes in Pacific delta13C distributions are much smaller than observed in shorter records from the North Atlantic. This may be too small to be a dominant cause of atmospheric pCO2 change, unless current models underestimate the sensitivity of pCO2 to nutrient redistributions. This dampening of Pacific relative to Atlantic delta13C depth gradient favors a North Atlantic origin of the phenomenon, although local variations of Pacific intermediate water masses can not be excluded at present.

Related to:

Mix, Alan C; Pisias, Nicklas G; Zahn, Rainer; Rugh, W D; Lopez, Cody; Nelson, K (1991): Carbon 13 in Pacific deep and intermediate waters, 0-370 ka: implications for ocean circulation and Pleistocene CO2. Paleoceanography, 6(2), 205-226, https://doi.org/10.1029/90PA02303

Further details:

Mix, Alan C; Pisias, Nicklas G; Zahn, Rainer; Rugh, W D; Lopez, Cody; Nelson, K (1991): Stable isotope record of bentic foraminifera in sediment cores of the eastern Pacific. PANGAEA, https://doi.org/10.1594/PANGAEA.701404

Murray, David W (1987): Spatial and temporal variations in sediment accumulation in the central tropical Pacific. PhD thesis, Oregon State University, Corvallis, 343 pp

Coverage:

Latitude: -0.097000 * Longitude: -95.650000

Date/Time Start: 1970-04-26T00:00:00 * Date/Time End: 1970-04-26T00:00:00

Minimum DEPTH, sediment/rock: 0.01 m * Maximum DEPTH, sediment/rock: 15.51 m

Event(s):

RC13-110 * Latitude: -0.097000 * Longitude: -95.650000 * Date/Time: 1970-04-26T00:00:00 * Elevation: -3231.0 m * Recovery: 15.59 m * Campaign: * Basis: Robert Conrad * Method/Device: Piston corer (PC)

Comment:

CaCO3 by Pisias for this paper. Stable isotopes by Mix et al. (1991). For benthic isotopes see Mix et al. (1991).

Isotopic values were incorrectly transfered, values corrected on 2020-010-08.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Lyle, Mitchell W		Geocode
2	AGE	Age	ka BP	Lyle, Mitchell W		Geocode
3	Calcium carbonate	CaCO3	%	Pisias, Nicklas G
4	Neogloboquadrina dutertrei, δ13C	N. dutertrei δ13C	‰ PDB	Mix, Alan C
5	Neogloboquadrina dutertrei, δ18O	N. dutertrei δ18O	‰ PDB	Mix, Alan C
6	Density, dry bulk	DBD	g/cm³	Lyle, Mitchell W	Calculated	calculated by regression of Murray (1987)

License:

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

Size:

796 data points

Data

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

1 Depth sed [m]	2 Age [ka BP]	3 CaCO3 [%]	4 N. dutertrei δ13C [‰ PDB]	5 N. dutertrei δ18O [‰ PDB]	6 DBD [g/cm³]
0.01	0.36	57.0	1.60	0.53	0.440
0.05	1.77		1.61	0.34
0.11	3.88	68.3	1.68	0.46	0.529
0.16	5.33		1.69	0.64
0.21	6.96	69.8	1.34	0.92	0.544
0.25	8.31		1.42	0.93
0.31	10.33	71.8	1.50	1.04	0.565
0.35	11.66		1.27	1.14
0.41	13.64	69.7	1.28	1.26	0.543
0.45	14.99		1.35	1.43
0.51	16.96	72.3	1.57	1.64	0.570
0.55	19.26		1.35	1.64
0.60	20.84	66.7	1.59	1.65	0.515
0.65	23.54		1.63	1.51
0.71	26.14	71.0	1.58	1.58	0.557
0.75	27.43		1.70	1.39
0.81	29.13	64.7			0.498
0.91	31.97	74.7	1.69	1.22	0.598
0.95	33.17		1.66	1.27
1.01	34.46	70.4	1.64	1.37	0.550
1.05	35.65		1.77	1.19
1.11	37.44	62.6	1.76	1.13	0.480
1.15	38.96		1.78	1.09
1.21	40.55	55.9	1.69	1.08	0.433
1.25	42.18		1.76	0.88
1.31	44.58	62.6	1.49	0.82	0.481
1.35	46.19		1.62	0.85
1.41	48.54	58.6	1.66	0.79	0.451
1.45	50.09		1.64	0.95
1.51	52.30	66.0	1.58	1.03	0.509
1.55	53.76		1.64	1.07
1.61	55.82	56.1	1.49	1.26	0.434
1.65	57.19		1.55	0.90
1.71	59.24	55.1	1.61	0.93	0.428
1.76	61.11		1.73	0.71
1.81	63.17	46.6	1.63	0.90	0.381
1.85	65.04		1.61	0.70
1.91	67.56	50.2	1.54	1.01	0.400
1.95	71.86		1.58	0.88
2.01	73.72	51.7	1.78	0.94	0.408
2.07	82.41		1.76	0.95
2.11	85.99	49.2	1.95	0.63	0.394
2.15	92.79		1.78	0.74
2.21	98.01	39.0	1.85	0.78	0.347
2.26	103.56		1.91	0.67
2.31	105.82	32.8			0.323
2.36	108.08		1.89	0.65
2.41	110.34	53.0	1.67	0.84	0.415
2.45	110.90		1.78	0.58
2.51	111.74	45.7	1.67	0.82	0.377
2.55	112.33		1.75	0.66
2.61	113.61	34.7	1.62	0.36	0.330
2.64	115.08		1.54	0.58
2.71	117.39	54.8	1.48	0.15	0.426
2.75	118.68		1.55	0.05
2.81	120.85	53.3	1.53	-0.10	0.417
2.85	122.67		1.49	-0.03
2.91	124.52	55.3	1.26	0.35	0.429
2.95	126.12		1.40	0.23
3.01	128.52	56.6	1.08	0.92	0.438
3.06	130.45		0.98	0.91
3.11	132.37	61.4	1.00	1.20	0.471
3.15	134.09		1.22	1.36
3.21	136.84	61.5	1.38	1.00	0.472
3.25	138.92		1.34	1.54
3.31	142.15	61.4	1.41	1.22	0.471
3.35	144.40		1.47	1.07
3.41	147.63	55.2	1.43	1.21	0.429
3.45	149.65		1.41	1.11
3.51	152.46	50.2	1.24	1.24	0.400
3.55	154.13		1.14	1.13
3.61	156.43	51.9	1.34	1.02	0.409
3.65	157.87		1.46	1.13
3.71	159.93	53.9	1.50	1.11	0.420
3.75	161.33		1.51	0.87
3.81	163.41	53.5			0.418
3.85	164.81		1.42	0.98
3.91	166.99	56.5	1.51	1.07	0.437
3.95	168.65		1.49	0.85
4.01	171.41	63.3	1.68	0.58	0.486
4.05	173.33		1.47	0.77
4.11	176.60	58.4	1.39	0.84	0.449
4.15	178.80		1.50	0.60
4.21	182.17	54.3	1.55	0.59	0.423
4.25	184.40		1.44	0.51
4.31	187.66	50.2	1.49	0.22	0.400
4.35	189.90		1.73	-0.12
4.41	193.28	56.1	1.64	0.02	0.434
4.44	195.10		1.65	0.03
4.51	199.45	54.5	1.77	0.36	0.424
4.55	202.08		1.75	0.42
4.61	206.03	66.0	1.71	-0.07	0.509
4.65	208.60		1.71	0.04
4.71	212.24	64.5	1.61	0.02	0.496
4.76	215.06		1.48	0.23
4.81	217.64	65.7	1.57	0.20	0.506
4.86	220.07		1.51	0.00
4.91	222.29	61.2	1.59	-0.10	0.469
4.95	224.00		1.60	0.13
5.01	226.40	69.5	1.56	0.37	0.542
5.05	227.93		1.53	0.23
5.11	230.12	62.8	1.73	0.22	0.482
5.15	231.51		1.37	0.39
5.21	233.54	63.1	1.80	-0.01	0.484
5.25	234.84		1.33	0.33
5.31	236.74	60.0	1.46	0.26	0.461
5.35	237.96		1.66	-0.30
5.41	239.72	62.5	1.44	-0.07	0.480
5.45	240.90		1.76	0.47
5.51	242.64	65.4	1.74	0.29	0.503
5.56	244.24		1.86	0.20
5.61	245.97	62.8	1.81	0.06	0.482
5.66	248.10		1.67	0.22
5.71	250.57	70.6	1.83	0.14	0.552
5.76	253.61		1.69	0.24
5.81	257.06	72.0	1.69	0.23	0.567
5.86	260.92		1.57	0.27
5.91	264.89	66.1	1.54	0.16	0.509
5.95	268.06		1.39	0.38
6.01	272.66	61.8	1.34	0.21	0.474
6.06	276.27		1.34	0.24
6.11	279.68	75.1	1.01	0.34	0.603
6.14	281.60		1.11	0.31
6.21	286.08	77.3	1.08	0.33	0.632
6.25	288.41		0.77	0.50
6.31	291.89	74.9	0.63	0.15	0.601
6.34	293.52		1.21	-0.04
6.41	297.21	81.4	1.36	0.28	0.692
6.46	299.84		1.46	0.07
6.51	302.51	79.2	1.32	0.55	0.659
6.54	304.22		1.58	0.37
6.61	308.31	80.5	1.61	0.33	0.678
6.66	311.52		1.56	0.41
6.71	314.82	71.9	1.26	0.48	0.567
6.76	318.09		1.40	0.54
6.81	321.25	73.5	1.32	0.60	0.584
6.86	324.20		1.37	0.68
6.91	326.88	78.4	1.70	0.45	0.647
6.95	328.75		1.47	0.37
7.01	331.20	77.9	1.85	0.45	0.640
7.06	332.88		1.74	0.22
7.11	334.33	70.3	1.65	0.22	0.550
7.16	335.59		1.62	0.21
7.21	336.80	79.3	1.83	0.25	0.660
7.26	338.04		0.91	0.99
7.31	339.35	76.4	0.99	1.06	0.620
7.35	340.55		1.20	1.11
7.41	342.48	81.1	1.45	1.09	0.689
7.46	344.39		1.38	1.13
7.51	346.51	82.1	1.38	1.03	0.704
7.54	347.95		1.59	0.97
7.61	351.38	74.7			0.598
7.64	352.84		1.60	1.11
7.71	356.39	82.1	1.72	0.61	0.705
7.76	358.96		1.73	0.79
7.81	361.51	80.7	1.68	0.96	0.682
7.86	364.19		1.77	0.68
7.91	366.94	79.4	1.86	0.29	0.662
7.95	369.27		1.69	0.55
8.01	372.81	80.3	1.69	0.78	0.675
8.06	375.91		1.84	0.09
8.11	379.02	74.9	1.62	0.45	0.601
8.15	381.58		1.70	0.13
8.21	385.44	74.5	1.74	0.04	0.596
8.26	388.69		2.09	-0.04
8.31	391.90	75.1	1.90	-0.03	0.603
8.36	395.10		2.01	0.19
8.41	398.17	81.1	1.82	0.26	0.687
8.46	401.19		1.76	0.03
8.51	404.10	77.1	1.76	0.19	0.628
8.55	406.34		1.71	0.14
8.61	409.52	75.8	1.94	0.07	0.612
8.65	411.55		1.49	0.54
8.71	414.52	81.5	1.65	0.25	0.694
8.74	416.00		1.35	0.66
8.81	419.45	79.8	1.35	0.81	0.668
8.85	421.43		1.36	1.42
8.91	424.41	79.1	1.20	0.86	0.657
8.95	426.37		1.29	0.77
9.01	429.25	80.2	1.42	1.35	0.674
9.06	431.67		1.84	1.20
9.11	434.06	82.2	1.69	1.13	0.706
9.15	436.04		1.76	1.48
9.21	438.99	81.9	1.73	1.35	0.701
9.25	441.02		1.98	1.10
9.31	444.01	86.3	1.88	0.96	0.783
9.35	446.03		1.75	0.78
9.41	449.02	82.8	1.76	0.86	0.716
9.46	451.55		1.69	0.86
9.51	454.10	83.0	1.73	0.76	0.719
9.55	456.18		1.77	0.87
9.61	459.29	84.9	2.01	0.58	0.755
9.66	461.91		1.94	0.41
9.71	464.43	85.0	1.74	0.84	0.756
9.76	466.83		1.92	0.60
9.81	468.99	77.8	1.80	0.45	0.639
9.86	470.93		2.07	0.25
9.91	472.63	84.8	2.09	0.50	0.753
9.96	474.12		2.04	0.48
10.01	475.45	79.7	2.26	0.37	0.666
10.11	478.14	69.5	1.94	0.01	0.541
10.16	479.76		2.20	0.37
10.21	481.68	76.0	2.24	0.42	0.615
10.26	483.71		2.17	0.45
10.31	486.17	73.0	2.18	0.29	0.579
10.36	489.10		1.92	0.52
10.41	492.40	78.3	2.05	0.32	0.646
10.46	496.24		1.99	0.44
10.51	500.07	76.2	2.07	0.40	0.617
10.55	503.30		1.87	0.54
10.61	507.99	70.9			0.556
10.66	511.89		1.97	0.46
10.71	515.65	82.0	2.03	0.53	0.702
10.76	519.45		1.89	0.74
10.81	523.46	78.9			0.654
10.86	527.46		1.91	0.58
10.91	531.76	75.0	1.90	0.43	0.602
10.95	535.50		1.76	0.33
11.01	541.34	74.4	1.84	0.24	0.594
11.06	546.22		1.67	0.45
11.11	551.11	72.8	1.74	0.39	0.577
11.15	554.61		1.79	0.48
11.21	559.36	78.9	1.69	0.32	0.654
11.26	562.64		1.73	0.38
11.31	565.38	70.9	1.74	0.46	0.556
11.35	567.49		1.74	0.36
11.41	570.28	71.2	2.07	-0.07	0.559
11.46	572.49		1.91	0.09
11.51	574.62	71.7	1.87	-0.01	0.564
11.56	576.74		1.98	0.23
11.61	578.84	70.8	1.83	-0.13	0.554
11.66	580.96		1.53	0.15
11.71	583.08	79.7	1.82	0.30	0.666
11.75	584.77		1.58	0.40
11.81	587.29	63.6	1.64	0.29	0.489
11.86	589.43		1.65	0.21
11.91	591.72	65.9	1.98	0.13	0.507
11.95	593.77		1.83	0.19
12.01	597.04	64.5	1.87	0.03	0.496
12.06	600.12		1.86	0.17
12.10	602.71		1.80	0.04
12.11	603.40	65.5			0.504
12.15	606.19		1.77	-0.02
12.20	609.74	68.0	1.61	0.09	0.526
12.24	612.20		1.33	0.25
12.31	616.50	68.0	1.28	0.34	0.526
12.35	618.77		1.16	0.48
12.41	621.30	69.8	1.22	0.45	0.544
12.45	622.99		1.20	1.24
12.51	625.52	74.4			0.595
12.61	629.74	68.5			0.532
12.71	633.96	73.6			0.585
12.81	638.17	77.2			0.630
12.91	642.39	77.3			0.632
13.01	646.61	81.5			0.695
13.11	650.83	79.3			0.660
13.21	655.04	70.2			0.548
13.31	659.26	65.9			0.508
13.41	663.48	64.5			0.495
13.51	667.70	64.4			0.495
13.61	671.91	53.8			0.420
13.71	676.13	64.6			0.496
13.81	680.35	57.2			0.441
13.91	684.57	62.5			0.479
14.01	688.78	63.4			0.486
14.11	693.00	72.9			0.578
14.21	697.22	71.0			0.557
14.31	701.44	63.4			0.487
14.41	705.66	70.4			0.550
14.51	709.87	64.0			0.491
14.61	714.09	65.5			0.504
14.71	718.31	65.6			0.505
14.81	722.53	69.8			0.544
14.91	726.74	67.8			0.524
15.01	730.96	68.5			0.531
15.11	735.18	66.3			0.511
15.21	739.40	63.9			0.491
15.31	743.61	60.9			0.467
15.41	747.83	66.5			0.513
15.51	752.05	60.3			0.463