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Bolliet, Timothé; Holbourn, Ann; Kuhnt, Wolfgang; Laj, Carlo E; Kissel, Catherine; Beaufort, Luc; Kienast, Markus; Andersen, Nils; Garbe-Schönberg, Carl-Dieter (2011): Planktonic and benthic foraminiferal stable isotopes, SSTs and thermocline temperature, coccoliths and benthic foraminiferal assemblages, and productivity reconstruction for sediment core MD06-3067. PANGAEA, https://doi.org/10.1594/PANGAEA.770282, In supplement to: Bolliet, T et al. (2011): Mindanao Dome variability over the last 160 kyr: Episodic glacial cooling of the West Pacific Warm Pool. Paleoceanography, 26, PA1208, https://doi.org/10.1029/2010PA001966

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Abstract:
We present sea surface, upper thermocline, and benthic d18O data, as well as temperature and paleoproductivity proxy data, from the International Marine Global Change Study Program (IMAGES) Core MD06-3067 (6°31'N, 126°30'E, 1575 m water depth), located in the western equatorial Pacific Ocean within the flow path of the Mindanao Current. Our records reveal considerable glacial-interglacial and suborbital variability in the Mindanao Dome upwelling over the last 160 kyr. Dome activity generally intensified during glacial intervals resulting in cooler thermocline waters, whereas it substantially declined during interglacials, in particular in the early Holocene and early marine oxygen isotope stage (MIS) 5e, when upwelling waters did not reach the thermocline. During MIS 3 and MIS 2, enhanced surface productivity together with remarkably low SST and low upper ocean thermal contrast provide evidence for episodic glacial upwelling to the surface, whereas transient surface warming marks periodic collapses of the Mindanao Dome upwelling during Heinrich events. We attribute the high variability during MIS 3 and MIS 2 to changes in the El Niño Southern Oscillation state that affected boreal winter monsoonal winds and upper ocean circulation. Glacial upwelling intensified when a strong cyclonic gyre became established, whereas El Niño–like conditions during Heinrich events tended to suppress the cyclonic circulation, reducing Ekman transport. Thus, our findings demonstrate that variations in the Mindanao Dome upwelling are closely linked to the position and intensity of the tropical convection and also reflect far-field influences from the high latitudes.
Project(s):
International Marine Global Change Study (IMAGES)
Coverage:
Latitude: 6.514330 * Longitude: 126.497660
Date/Time Start: 2008-03-06T07:58:00 * Date/Time End: 2008-03-06T07:58:00
Minimum DEPTH, sediment/rock: 0.110 m * Maximum DEPTH, sediment/rock: 15.500 m
Event(s):
MD06-3067 * Latitude: 6.514330 * Longitude: 126.497660 * Date/Time: 2008-03-06T07:58:00 * Elevation: -1575.0 m * Recovery: 13.63 m * Location: Mindanao * Campaign: MD155 (IMAGES XIV - MARCO POLO 2) * Basis: Marion Dufresne * Device: Calypso Corer II (CALYPSO2) * Comment: core bent
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmGeocode
2AGEAgeka BPGeocode
3Foraminifera, benthic d18OForam bent d18Oper mil PDBBolliet, TimothéMass spectrometer Finnigan MAT 251Planulina wuellerstorfi and/or Cibicidoides mundulus
4Globigerinoides ruber white, d18OG. ruber w d18Oper mil PDBBolliet, TimothéMass spectrometer Finnigan MAT 251
5Sea surface temperature, annual meanSST (1-12)°CBolliet, TimothéCalculated from Mg/Ca ratios (Anand et al., 2003)based on G. ruber
6Globigerinoides ruber white, Magnesium/Calcium ratioG. ruber w Mg/Cammol/molBolliet, TimothéICP-OES, Inductively coupled plasma - optical emission spectrometry
7delta 18O, waterd18O H2Oper mil SMOWBolliet, TimothéCalculated (Bemis et al., 1998)based on G. ruber
8delta 18O, waterd18O H2Oper mil SMOWBolliet, TimothéCalculated (Bemis et al., 1998)based on G. ruber corrected from reconstructed sea level
9Thermocline temperatureTT°CBolliet, TimothéCalculated from Mg/Ca ratios (Anand et al., 2003)based on P. obliquiloculata
10Pulleniatina obliquiloculata, Magnesium/Calcium ratioP. obliqu. Mg/Cammol/molBolliet, TimothéICP-OES, Inductively coupled plasma - optical emission spectrometry
11Pulleniatina obliquiloculata, d18OP. obliqu. d18Oper mil PDBBolliet, TimothéMass spectrometer Finnigan MAT 251
12delta 18O, waterd18O H2Oper mil SMOWBolliet, TimothéCalculated (Bemis et al., 1998)based on P. obliquiloculata
13delta 18O, waterd18O H2Oper mil SMOWBolliet, TimothéCalculated (Bemis et al., 1998)based on P. obliquiloculata corrected from reconstructed sea level
14Globobulimina spp.Globobulimina spp.%Bolliet, TimothéCounting >250 µm fraction+ ovoides
15Globocassidulina subglobosaG. subglobosa%Bolliet, TimothéCounting >250 µm fraction
16Pyrgo spp.Pyrgo spp.%Bolliet, TimothéCounting >250 µm fraction
17Loxostomina sp.Loxostomina sp.%Bolliet, TimothéCounting >250 µm fraction
18Gephyrocapsa oceanicaG. oceanica%Bolliet, TimothéCounting, diatoms
19Gephyrocapsa muelleraeG. muellerae%Bolliet, TimothéCounting, diatoms
20Helicosphaera spp.Helicosphaera spp.%Bolliet, TimothéCounting, diatoms
21Emiliania huxleyiE. huxleyi%Bolliet, TimothéCounting, diatoms
22Florisphaera profundaF. profunda%Bolliet, TimothéCounting, diatoms
23Gephyrocapsa ericsoniiG. ericsonii%Bolliet, TimothéCounting, diatoms
24Productivity of carbonPnewg/m2/aBolliet, TimothéPP calculated (Beaufort et al., 1997)
25Temperature, differencedelta T°CBolliet, TimothéCalculatedsurface - thermocline waters
Size:
5952 data points

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