Portuguese Margin MIS6 foraminiferal isotope and palynology data
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               World Data Center for Paleoclimatology, Boulder
                                  and
                     NOAA Paleoclimatology Program
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NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!!


NAME OF DATA SET: 
Portuguese Margin MIS6 foraminiferal isotope and palynology data

LAST UPDATE: 9/7/2010 (Updated chronology for planktonic isotope data table) 
CONTRIBUTOR:  Chronis Tzedakis, University College London
IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER:  2010-084

WDC PALEO CONTRIBUTION SERIES CITATION: 
Portuguese Margin MIS6 foraminiferal isotope and palynology data
IGBP PAGES/World Data Center for Paleoclimatology 
Data Contribution Series # 2010-084
NOAA/NCDC Paleoclimatology Program, Boulder CO, USA.


ORIGINAL REFERENCE:  Margari, V., L.C. Skinner, P.C. Tzedakis, A. Ganopolski, M. Vautravers
and N.J. Shackleton. 2010. The nature of millennial-scale climate variability during the past two glacial periods.
Nature Geoscience 3, 127 - 131.   doi: 10.1038/ngeo740

ABSTRACT: 
During the last glacial period, iceberg discharges into the North Atlantic disrupted the meridional overturning circulation, leading to cooling in the Northern Hemisphere and warming in Antarctica. This asymmetric response can be explained by a bipolar see-saw mechanism, whereby changes in the strength of the meridional overturning circulation lead to changes in the interhemispheric heat transport. It is unclear, however, to what extent the response of the overturning circulation is a function of freshwater flux and boundary climate conditions. Here we use foraminiferal isotope and pollen records from the Portuguese margin to reconstruct surface- and deep-water hydrography and atmospheric changes during the last and penultimate glacial periods. When we compare our records with temperature reconstructions from Antarctica, we find that the bipolar see-saw was a characteristic feature of both glacial periods. However, the comparison also underlines the dependence of the bipolar see-saw on background climate and magnitude of iceberg discharge. It also suggests that an intensified hydrological cycle may lead to a weaker overturning circulation with a smaller disruption threshold and extended North Atlantic stadial durations.

ADDITIONAL REFERENCES:
Vautravers, M. and N.J. Shackleton. 2006. Centennial scale surface hydrology off Portugal during Marine Isotope Stage 3: Insights from planktonic foraminiferal fauna variability. Paleoceanography  21, PA3004. 

Shackleton, N.J., M.A. Hall, and E. Vincent. 2000. Phase relationships between millennial-scale events 64,000–24,000 years ago. Paleoceanography, 15(6), 565–569. doi:10.1029/2000PA000513. 

GEOGRAPHIC REGION: Eastern North Atlantic off Portugal
PERIOD OF RECORD: 193 - 136 Kyr BP

FUNDING SOURCE: 
NERC (NE/C514758/1), EU (EV K2-CT-2000-00089) and the Royal Society.

DESCRIPTION:
Core MD01-2444 (37°33.68N; 10°08.53W; 2,637 m water depth; 27.45 m in length)
MD01-2444 MIS3 isotope and faunal data in Vautravers and Shackleton, 2006.

DATA:

A detailed chronological framework for the MIS6 section of MD01-2444  	
was developed by aligning its benthic d18O record to the deuterium 	
content (dD) in the Dome C (EDC) ice core of the European Project for 	
Ice Coring in Antarctica (EPICA), plotted on the new EDC3 timescale 	
(Parrenin et al., 2007), on the basis of the implications of the study by 	
Shackleton et al. (2000).    A minimum tuning approach was adopted,	
using event stratigraphy to align the most obvious “peaks” in the two records	

Depth(m)	Age Control points (ka)
22.02	136.1
22.5	141.686
23.7	149.586
24.48	159.105
24.72	162.476
25.32	168.273
25.71	172.009
25.95	175.461
26.01	177.065
27.03	188.009
27.3	192.231


TABLE 1:
Depth (m)	EDC3 Age (ka)	d18Oplanktonic (G. bulloides)
22.02	136.100	2.94
22.05	136.449	2.35
22.08	136.798	1.92
22.11	137.147	2.07
22.14	137.497	2.03
22.17	137.846	2.37
22.20	138.195	1.92
22.23	138.544	2.24
22.26	138.893	2.22
22.29	139.242	2.46
22.32	139.591	2.42
22.35	139.940	2.56
22.38	140.290	2.53
22.41	140.639	2.71
22.44	140.988	3.07
22.47	141.337	2.71
22.50	141.686	2.51
22.53	141.884	2.6
22.56	142.081	2.19
22.59	142.279	2.3
22.62	142.476	2.27
22.65	142.674	2.17
22.68	142.871	2.26
22.71	143.069	2.21
22.74	143.266	2.3
22.77	143.464	2.47
22.80	143.661	2.57
22.83	143.859	2.07
22.86	144.056	2.77
22.89	144.254	2.76
22.92	144.451	2.75
22.95	144.649	2.95
22.98	144.846	2.75
23.01	145.044	2.83
23.04	145.241	2.83
23.07	145.439	2.71
23.10	145.636	2.77
23.13	145.834	2.59
23.16	146.031	2.61
23.19	146.229	2.78
23.22	146.426	2.61
23.25	146.624	2.95
23.28	146.821	2.85
23.31	147.019	2.71
23.34	147.216	2.79
23.37	147.414	2.66
23.40	147.611	2.91
23.43	147.809	2.97
23.46	148.006	2.91
23.49	148.204	2.8
23.52	148.401	2.63
23.55	148.599	2.37
23.58	148.796	2.44
23.64	149.191	2.83
23.67	149.389	2.49
23.70	149.586	
23.73	149.952	2.41
23.79	150.684	2.78
23.82	151.050	2.7
23.85	151.417	2.65
23.88	151.783	2.47
23.91	152.149	2.78
23.97	152.881	2.9
24.00	153.247	3.01
24.03	153.613	2.84
24.06	153.979	2.81
24.09	154.346	2.88
24.12	154.712	2.85
24.15	155.078	2.91
24.18	155.444	2.75
24.21	155.810	2.72
24.24	156.176	2.48
24.27	156.542	2.66
24.30	156.908	2.53
24.33	157.274	2.28
24.36	157.641	2.51
24.39	158.007	2.15
24.42	158.373	1.99
24.45	158.739	1.96
24.48	159.105	2.31
24.51	159.526	2.46
24.54	159.948	2.29
24.57	160.369	2.23
24.60	160.791	2.22
24.63	161.212	2.28
24.66	161.633	2.32
24.69	162.055	2.63
24.72	162.476	2.68
24.75	162.766	2.19
24.78	163.056	2.24
24.81	163.346	2.21
24.84	163.635	2.11
24.87	163.925	2.11
24.90	164.215	2.02
24.93	164.505	1.85
24.99	165.085	1.96
25.02	165.375	1.75
25.05	165.664	1.75
25.08	165.954	1.96
25.14	166.534	1.5
25.17	166.824	1.71
25.20	167.114	1.27
25.23	167.403	1.39
25.26	167.693	1.43
25.29	167.983	1.21
25.32	168.273	2.15
25.35	168.560	2.14
25.38	168.848	2.18
25.41	169.135	1.93
25.44	169.423	2
25.47	169.710	2.47
25.50	169.997	2.28
25.53	170.285	2.39
25.56	170.572	2.18
25.59	170.859	2.13
25.62	171.147	1.89
25.65	171.434	1.29
25.68	171.722	1.49
25.71	172.009	2.27
25.74	172.441	2.2
25.77	172.872	2.15
25.80	173.304	2.21
25.83	173.735	2.24
25.86	174.167	1.86
25.89	174.598	2.35
25.92	175.030	2.07
25.94	175.317	0.8
25.95	175.461	
25.97	175.996	1.25
25.98	176.263	1.84
26.00	176.798	1.43
26.01	177.065	2.31
26.03	177.280	2.16
26.04	177.387	2.27
26.06	177.601	2.03
26.07	177.709	2.07
26.09	177.923	2.17
26.13	178.353	2.41
26.16	178.674	2.34
26.19	178.996	2.31
26.22	179.318	2.18
26.25	179.640	1.45
26.28	179.962	2.01
26.31	180.284	1.63
26.37	180.928	1.56
26.40	181.249	1.73
26.43	181.571	1.64
26.46	181.893	1.69
26.49	182.215	1.82
26.52	182.537	1.78
26.55	182.859	1.57
26.58	183.181	1.57
26.61	183.503	1.67
26.64	183.825	1.86
26.67	184.146	1.76
26.70	184.468	1.64
26.73	184.790	1.42
26.76	185.112	1.41
26.79	185.434	1.3
26.85	186.078	0.81
26.88	186.400	0.82
26.91	186.721	0.77
26.94	187.043	1
26.97	187.365	1.45
27.00	187.687	2.03
27.03	188.009	2.05
27.06	188.478	1.87
27.09	188.947	2.2
27.12	189.416	2.32
27.15	189.885	2.02
27.18	190.355	1.71
27.21	190.824	1.3
27.24	191.293	1.13
27.30	192.231	1.07
27.33	192.442	1.08
27.36	192.653	1.69
27.39	192.865	1.77
27.42	193.076	1.79


TABLE 2:
Depth (m)	EDC3 Age (ka)	mean d18Obenthic
22.02	136.1	4.846
22.05	136.449	5.0339
22.08	136.798	5.0184
22.11	137.147	5.0053
22.14	137.497	4.8626
22.17	137.846	5.0479
22.2	138.195	4.9731
22.23	138.544	5.0041
22.26	138.893	5.0032
22.29	139.242	5.0247
22.32	139.591	5.0332
22.35	139.94	5.0709
22.38	140.29	4.9651
22.44	140.988	5.0519
22.47	141.337	5.0623
22.5	141.686	4.63
22.53	141.884	4.76
22.56	142.081	4.84
22.62	142.476	5.01
22.65	142.674	4.83
22.68	142.871	4.83
22.71	143.069	4.925
22.74	143.266	5
22.77	143.464	4.92
22.8	143.661	4.91
22.83	143.859	4.87
22.86	144.056	4.49
22.92	144.451	4.9
22.98	144.846	4.99
23.01	145.044	4.775
23.04	145.241	4.8361
23.07	145.439	4.9765
23.1	145.636	4.7825
23.13	145.834	4.8182
23.16	146.031	4.8824
23.19	146.229	4.7587
23.22	146.426	4.7133
23.25	146.624	4.451
23.28	146.821	4.7856
23.31	147.019	4.8062
23.34	147.216	4.5946
23.37	147.414	4.8798
23.43	147.809	4.6114
23.46	148.006	4.7822
23.49	148.204	4.8561
23.52	148.401	4.8503
23.55	148.599	4.762
23.58	148.796	4.8943
23.64	149.191	4.6067
23.67	149.389	4.5981
23.7	149.586	4.3503
23.73	149.952	4.6905
23.76	150.318	4.7844
23.79	150.684	4.853
23.82	151.05	4.7661
23.88	151.783	4.7229
23.91	152.149	4.7143
23.94	152.515	4.7755
23.97	152.881	4.7469
24	153.247	4.7368
24.03	153.613	4.7642
24.06	153.979	4.8132
24.09	154.346	4.7128
24.12	154.712	4.6595
24.15	155.078	4.7808
24.18	155.444	4.7929
24.21	155.81	4.722
24.24	156.176	4.9228
24.27	156.542	4.8395
24.3	156.908	4.769
24.33	157.274	4.8969
24.36	157.641	4.8304
24.39	158.007	4.9077
24.42	158.373	4.9253
24.45	158.739	4.8997
24.48	159.105	4.4491
24.51	159.526	4.5567
24.54	159.948	4.813
24.57	160.369	4.9123
24.6	160.791	4.8434
24.63	161.212	4.7927
24.66	161.633	4.198
24.69	162.055	4.4349
24.72	162.476	4.274
24.75	162.766	4.4195
24.78	163.056	4.7002
24.81	163.346	4.4751
24.84	163.635	4.5734
24.87	163.925	4.704
24.9	164.215	4.7721
24.93	164.505	4.7555
24.99	165.085	4.7533
25.02	165.375	4.6993
25.05	165.664	4.7959
25.08	165.954	4.6409
25.11	166.244	4.6046
25.14	166.534	4.653
25.17	166.824	4.5614
25.2	167.114	4.529
25.23	167.403	4.5742
25.26	167.693	4.4024
25.29	167.983	4.462
25.32	168.273	3.9222
25.35	168.56	4.1661
25.38	168.848	4.2962
25.41	169.135	4.3282
25.44	169.423	4.3464
25.47	169.71	4.407
25.5	169.997	4.5378
25.53	170.285	4.58
25.56	170.572	4.59
25.59	170.859	4.625
25.65	171.434	4.465
25.68	171.722	4.5333
25.71	172.009	4.23
25.74	172.441	4.4433
25.77	172.872	4.49
25.8	173.304	4.66
25.83	173.735	4.74
25.86	174.167	4.61
25.89	174.598	4.59
25.92	175.03	4.6167
25.95	175.461	4.5081
25.98	176.263	4.6891
26.01	177.065	4.1634
26.04	177.387	4.4405
26.07	177.709	4.376
26.1	178.031	4.5431
26.13	178.353	4.4838
26.16	178.674	4.3537
26.19	178.996	4.5395
26.22	179.318	4.479
26.25	179.64	4.6461
26.28	179.962	4.7229
26.31	180.284	4.7401
26.34	180.606	4.7516
26.37	180.928	4.6712
26.4	181.249	4.6688
26.43	181.571	4.6772
26.46	181.893	4.642
26.49	182.215	4.7053
26.52	182.537	4.599
26.55	182.859	4.7003
26.58	183.181	4.6868
26.61	183.503	4.6015
26.64	183.825	4.5528
26.67	184.146	4.4994
26.7	184.468	4.5151
26.73	184.79	4.476
26.76	185.112	4.3519
26.79	185.434	4.3795
26.82	185.756	4.2806
26.85	186.078	4.1411
26.88	186.4	4.1704
26.91	186.721	4.0889
26.94	187.043	4.0107
26.97	187.365	3.7549
27	187.687	3.6538
27.03	188.009	3.5935
27.06	188.478	3.7962
27.09	188.947	3.4219
27.12	189.416	4.1604
27.15	189.885	4.3604
27.18	190.355	4.1185
27.21	190.824	4.2661
27.24	191.293	4.1171
27.27	191.762	4.0579
27.3	192.231	3.995
27.33	192.442	3.8857
27.36	192.653	4.2082
27.39	192.865	3.9808
27.42	193.076	4.1748
27.45	193.287	4.0978

TABLE 3:
Depth (m)	EDC3 Age (ka)	Temperate tree pollen % (Eurosiberian+Mediterranean trees and shrubs)	Mediterranean pollen % (Evergreen Quercus+Olea+Phillyrea+Pistacia)
22.02	136.1	3.31	1.33
22.05	136.449	7.89	1.75
22.08	136.798	7.27	0
22.11	137.147	2.73	0
22.14	137.497	12.5	3.29
22.17	137.846	6	0.67
22.2	138.195	4.85	0
22.23	138.544	11.82	2.73
22.26	138.893	3.92	0.65
22.29	139.242	6.48	0.93
22.32	139.591	1.75	0
22.35	139.94	7.89	1.75
22.38	140.29	4.67	2
22.41	140.639	5.77	0.96
22.44	140.988	3.77	0
22.47	141.337	4.55	0.91
22.5	141.686	5.57	0.66
22.53	141.884	4.2	0.84
22.56	142.081	2.55	1.27
22.59	142.279	4	2
22.62	142.476	2.48	0
22.65	142.674	4.52	0
22.68	142.871	4.64	0.66
22.71	143.069	7.14	0
22.74	143.266	1.33	0
22.77	143.464	6.09	1.74
22.8	143.661	1.33	0
22.83	143.859	4.35	0.87
22.86	144.056	4.61	1.97
22.89	144.254	9.01	2.7
22.92	144.451	4.32	0
22.95	144.649	7.21	0
22.98	144.846	2.8	0.94
23.01	145.044	4.76	0.95
23.04	145.241	6.62	1.33
23.07	145.439	8.33	0.93
23.1	145.636	2.91	0
23.13	145.834	2.63	0
23.16	146.031	7.33	0.67
23.19	146.229	4.51	0
23.22	146.426	2.42	1.61
23.25	146.624	5	0
23.28	146.821	2.63	0
23.31	147.019	2.94	0
23.34	147.216	1.99	0
23.37	147.414	7.62	0
23.4	147.611	5.33	0.67
23.43	147.809	2.94	0.98
23.46	148.006	1.97	0.66
23.49	148.204	5.83	0
23.52	148.401	4	0.67
23.55	148.599	10	2.73
23.58	148.796	15.34	1.84
23.61	148.994	13.73	0
23.64	149.191	4	0
23.67	149.389	8.33	0.93
23.7	149.586	6	1.33
23.73	149.952	2.73	0
23.76	150.318	4.59	0.92
23.79	150.684	6.67	1.9
23.82	151.05	10.96	1.99
23.85	151.417	5.71	0.95
23.88	151.783	3.64	0.91
23.91	152.149	2.73	0
23.94	152.515	0	0
23.97	152.881	0.93	0
24	153.247	9.43	2.83
24.03	153.613	3.92	0
24.09	154.346	0.95	0
24.15	155.078	1.87	0
24.18	155.444	0.65	0
24.21	155.81	2.46	0
24.24	156.176	4.9	1.96
24.27	156.542	5.09	0.85
24.3	156.908	1.33	0
24.33	157.274	4.31	0.86
24.36	157.641	2.86	0
24.39	158.007	5.56	1.85
24.42	158.373	3.23	0.64
24.45	158.739	22.64	7.55
24.48	159.105	3.33	0.67
24.51	159.526	1.96	0
24.54	159.948	2.35	0
24.6	160.791	6	0.67
24.63	161.212	12.82	2.56
24.66	161.633	13.07	8.5
24.69	162.055	3.92	0
24.72	162.476	9	2
24.75	162.766	8.92	2.82
24.78	163.056	12.38	1.9
24.81	163.346	8.77	4.39
24.84	163.635	2	0
24.87	163.925	13.51	3.38
24.9	164.215	9.87	3.95
24.93	164.505	12.4	1.65
24.96	164.795	8	2
24.99	165.085	11.11	1.59
25.02	165.375	14.57	7.28
25.05	165.664	18.18	3.64
25.08	165.954	11	1
25.11	166.244	18.58	2.65
25.14	166.534	23.87	5.81
25.17	166.824	25.71	3.81
25.2	167.114	17	3
25.23	167.403	15	2
25.26	167.693	19.47	7.92
25.29	167.983	30.48	3.81
25.32	168.273	11.77	2.94
25.35	168.56	9.82	2.68
25.41	169.135	10.46	0
25.44	169.423	11.01	0.92
25.47	169.71	9	1
25.5	169.997	9.26	3.7
25.53	170.285	19.61	5.23
25.56	170.572	9.8	1.96
25.59	170.859	11	1
25.62	171.147	17.59	2.78
25.65	171.434	24.25	2.66
25.68	171.722	19.25	2.82
25.71	172.009	21.39	4.97
25.77	172.872	12.7	0.65
25.8	173.304	12.38	1.9
25.83	173.735	18.55	4.84
25.86	174.167	24.44	3.33
25.89	174.598	12	2
25.95	175.461	30.67	5.33
25.98	176.263	29.52	9.52
26.01	177.065	21.05	3.95
26.07	177.709	13.08	1.87
26.13	178.353	8.25	0.66
26.16	178.674	10.58	0.96
26.19	178.996	17.88	3.97
26.22	179.318	22.02	1.84
26.25	179.64	18.42	1.97
26.28	179.962	18.69	2.8
26.31	180.284	16.72	2.62
26.34	180.606	17.76	2.8
26.37	180.928	15.23	2.65
26.4	181.249	14.91	2.63
26.43	181.571	15.52	0.86
26.46	181.893	10.62	4.43
26.49	182.215	10.75	1.3
26.52	182.537	16.67	5.56
26.55	182.859	22.03	5.09
26.58	183.181	15.52	2.59
26.61	183.503	7.24	0.66
26.64	183.825	5.64	0.81
26.67	184.146	8.74	0
26.7	184.468	7.84	1.96
26.73	184.79	10	0.67
26.76	185.112	12.73	0.91
26.79	185.434	15.39	0.86
26.82	185.756	20.79	1.98
26.85	186.078	17.1	2.63
26.88	186.4	26.13	3.6
26.91	186.721	14.42	1.92
26.94	187.043	21.82	4.55
26.97	187.365	8	0
27	187.687	27.89	4.81
27.03	188.009	24.4	6.7
27.06	188.478	28.57	6.67
27.09	188.947	21.36	1.94
27.12	189.416	10.38	0
27.15	189.885	9.35	0
27.18	190.355	18.4	1.6
27.21	190.824	23.81	3.81
27.24	191.293	31.37	5.88
27.27	191.762	38.83	2.91
27.3	192.231		
27.33	192.442	31.07	4.85
27.36	192.653	26	5
27.39	192.865	15	2
27.42	193.076	8.91	1.98