Citation:

35013033

Name: Stable isotope data and calcification temperature from planktic foraminifera in sediment core BOFS31/1K
Published: 2000
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Determining the past record of temperature and salinity of ocean surface waters is essential for understanding past changes in climate, such as those which occur across glacial-interglacial transitions. As a useful proxy, the oxygen isotope composition (delta18O) of calcite from planktonic foraminifera has been shown to reflect both surface temperature and seawater delta18O, itself an indicator of global ice volume and salinity (Shackleton, 1974; Rostek et al., 1993, doi:10.1038/364319a0). In addition, magnesium/calcium (Mg/Ca) ratios in foraminiferal calcite show a temperature dependence (Nürnberg, 1995, doi:10.2113/gsjfr.25.4.350; Nürnberg et al., 1996, doi:10.1016/0016-7037(95)00446-7; Lea et al., 1999, doi:10.1016/S0016-7037(99)00197-0) due to the partitioning of Mg during calcification. Here we demonstrate, in a field-based calibration experiment, that the variation of Mg/Ca ratios with temperature is similar for eight species of planktonic foraminifera (when accounting for Mg dissolution effects). Using a multi-species record from the Last Glacial Maximum in the North Atlantic Ocean we found that past temperatures reconstructed from Mg/Ca ratios followed the two other palaeotemperature proxies: faunal abundance (CLIMAP, 1981; Mix et al., 1999, doi:10.1029/1999PA900012) and alkenone saturation (Müller et al., 1998, doi:10.1016/S0016-7037(98)00097-0 ). Moreover, combining Mg/Ca and delta18O data from the same faunal assemblage, we show that reconstructed surface water delta18O from all foraminiferal species record the same glacial-interglacial change-representing changing hydrography and global ice volume. This reinforces the potential of this combined technique in probing past ocean-climate interactions.

Coverage:

Latitude: 18.997900 * Longitude: -20.162100

Date/Time Start: 1990-10-17T00:00:00 * Date/Time End: 1990-10-17T00:00:00

Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 0.98 m

Event(s):

BOFS31/1K (BOFS31#1) * Latitude: 18.997900 * Longitude: -20.162100 * Date/Time: 1990-10-17T00:00:00 * Elevation: -3300.0 m * Location: Northeast Atlantic * Campaign: * Basis: Charles Darwin * Method/Device: Kasten corer (KAL) * Comment: BOFS-ID 18537

Comment:

Calcification temperature derived from Mg/Ca ratios using the calibartion equation Mg/Ca(mmol/mol)=0.52exp0.1T (in deg C). Ages are in calendar years.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	AGE	Age	ka BP			Geocode
3	Globorotalia inflata, δ18O	G. inflata δ18O	‰ PDB	Elderfield, Henry	Isotope ratio mass spectrometry
4	Globigerinoides ruber pink, δ18O	G. ruber p δ18O	‰ PDB	Elderfield, Henry	Isotope ratio mass spectrometry
5	Neogloboquadrina pachyderma dextral, δ18O	N. pachyderma d δ18O	‰ PDB	Elderfield, Henry	Isotope ratio mass spectrometry
6	Globorotalia menardii, δ18O	G. menardii δ18O	‰ PDB	Elderfield, Henry	Isotope ratio mass spectrometry
7	Calcification temperature	Calc temp	°C	Elderfield, Henry		G. bulloides
8	Calcification temperature	Calc temp	°C	Elderfield, Henry		G. inflata
9	Calcification temperature	Calc temp	°C	Elderfield, Henry		G. ruber
10	Calcification temperature	Calc temp	°C	Elderfield, Henry		N. pachyderma dextral
11	Calcification temperature	Calc temp	°C	Elderfield, Henry		G. menardii
12	Δδ18O	Δδ18O	‰	Elderfield, Henry		G. bulloides
13	Δδ18O	Δδ18O	‰	Elderfield, Henry		G. inflata
14	Δδ18O	Δδ18O	‰	Elderfield, Henry		G. ruber
15	Δδ18O	Δδ18O	‰	Elderfield, Henry		N. pachyderma dextral
16	Δδ18O	Δδ18O	‰	Elderfield, Henry		G. menardii

License:

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

Size:

393 data points

Data

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

1 Depth sed [m]	2 Age [ka BP]	3 G. inflata δ18O [‰ PDB]	4 G. ruber p δ18O [‰ PDB]	5 N. pachyderma d δ18O [‰ PDB]	6 G. menardii δ18O [‰ PDB]	7 Calc temp [°C] (G. bulloides)	8 Calc temp [°C] (G. inflata)	9 Calc temp [°C] (G. ruber)	10 Calc temp [°C] (N. pachyderma dextral)	11 Calc temp [°C] (G. menardii)	12 Δδ18O [‰] (G. bulloides)	13 Δδ18O [‰] (G. inflata)	14 Δδ18O [‰] (G. ruber)	15 Δδ18O [‰] (N. pachyderma dextral)	16 Δδ18O [‰] (G. menardii)
0.00	0.00	0.81	-0.90	-0.17	0.24	17.740	12.788	18.007	13.800	13.171	0.000000	0.000001	0.000004	0.000004	-0.000004
0.04	1.82				0.23	17.774	13.042	17.356	14.290	13.580	-0.322140				0.086969
0.08	3.63	0.76	-1.00	-0.16	0.29	17.756	13.304	17.627	14.857	13.979	0.103690	0.072946	-0.185900	0.257960	0.241210
0.10	4.54				0.04	17.786	13.501	17.811	15.143	14.442	-0.339440				0.099953
0.12	5.45	0.60	-1.14	-0.27	0.19	17.518	13.860	18.183	15.109	14.915	-0.200330	0.044373	-0.200230	0.206720	0.360450
0.14	6.36				0.21	17.495	14.105	17.899	15.132	15.115	-0.305390				0.427020
0.16	7.26	0.80	-0.59	-0.15	0.08	17.201	13.987	18.165	15.564	14.753	-0.062207	0.274410	0.345540	0.432330	0.212770
0.18	8.17				0.41	17.336	13.791	18.061	16.325		-0.081612
0.20	9.08	0.84	-0.75	0.14		17.615	13.820	18.088	16.612		0.021745	0.274900	0.168330	0.963570
0.24	10.36					17.656	14.135	17.973	16.013		0.490960
0.26	11.00	1.06	-0.92	0.46		18.080	14.178	17.791	15.083		0.726820	0.579420	-0.068854	0.930780
0.28	11.64					17.984	14.242	17.631	14.730		0.935130
0.30	12.28	1.47	-0.44	0.96		18.114	13.719	17.660	14.778		1.024600	0.881210	0.381560	1.359600
0.32	12.86					17.581	13.397	17.448	14.972		0.923990
0.34	13.38	1.55	-0.14	0.74		17.417	14.268	17.209	14.511		0.606840	1.090500	0.579230	1.077200
0.36	13.90					17.389	15.161	17.086	13.952		0.720450
0.38	14.42	1.81	-0.03	1.01		17.053	15.266	17.358	12.592		0.864080	1.583600	0.723140	0.892720
0.40	14.94					17.072	14.135	17.378	11.832		0.918330
0.42	15.46	2.13	0.49	1.23		17.941	13.033	16.991	11.054		1.145500	1.378400	1.159600	0.741530
0.44	15.98					18.970	12.724	15.860	11.808		1.576800
0.46	16.50	2.40	0.89	1.27		19.555	11.906	15.414	11.498		1.907100	1.378400	1.196800	0.889460
0.48	17.02					18.556	11.275	14.899	11.583		1.884000
0.50	17.54	2.71	1.04	2.01		17.462	11.482	15.853	10.948		1.637000	1.585900	1.448400	1.495500
0.52	17.91					17.030	11.656	15.778	13.012		1.078800
0.54	18.28	2.68	0.78	1.80		18.438	11.650	16.097	12.731		1.557500	1.596400	1.244600	1.716000
0.56	18.66					18.969	11.515	15.363	12.337		1.776600
0.58	19.03	2.61	0.95	2.09		18.833	11.283	15.827	9.804		1.946000	1.437500	1.352300	1.294500
0.60	19.40					17.706	11.351	15.485	10.844		1.492400
0.62	19.77	2.39	0.89	2.08		17.751	11.007	15.712	11.345		1.602500	1.150500	1.265700	1.662200
0.64	20.14					17.344	10.855	15.015	11.482		1.410200
0.66	20.51	2.46	0.88	1.64		16.739	12.153	15.116	10.829		1.072200	1.497700	1.117600	1.096600
0.68	20.89					15.658	12.074	15.151	10.883		1.223700
0.70	21.26	2.09	1.12	1.59		15.867	12.476	16.006	11.164		0.972090	1.205400	1.563500	1.128300
0.72	21.63					17.609	11.709	15.984	10.285		1.470500
0.74	22.00	2.46	0.72	1.97		18.057	11.505	15.639	9.070		1.371600	1.341300	1.079000	0.992300
0.76	22.37					17.804	11.745	15.095	8.432		1.514500
0.78	22.74	2.07	0.75	2.08		17.365	11.357	14.838	9.952		1.415100	0.915580	0.922740	1.321100
0.80	23.12					17.233	11.976	15.212	10.394		1.285100
0.82	23.49	1.95	1.27	0.94		17.406	11.717	15.775	10.390		1.324300	0.882770	1.660400	0.288960
0.84	23.86					16.309	12.049	16.295	9.565		1.273700
0.86	24.23	2.03	0.66	1.61		16.222	11.900	15.974	10.967		0.843710	1.007000	1.096400	1.100200
0.88	24.60					15.757	12.120	15.259	11.808		0.846510
0.90	24.97	2.06	1.77	2.24		16.376	11.885	14.579	12.352		1.089200	1.033200	1.882200	2.065300
0.92	25.35					16.003	11.517	14.410	11.509		1.003300
0.94	25.72	2.00	0.78	1.49		16.162	11.617	13.949	10.473		0.879990	0.908630	0.744310	0.859470
0.96	26.09					15.489	11.894	14.077	9.523		0.774620
0.98	26.46	1.85	1.03	1.00