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Ronge, Thomas A; Nürnberg, Dirk; Tiedemann, Ralf (2018): Mg/Ca-derived temperature estimates for ODP Site 202-1236. PANGAEA, https://doi.org/10.1594/PANGAEA.896166

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Abstract:
Here we use Mg/Ca temperature estimates from subsurface and thermocline dwelling foraminifera to reconstruct the meridional Plio‐Pleistocene evolution of the Southeast Pacific thermocline, in relation to atmospheric circulation changes. Our data indicate a change in the thermocline, responding to the northward displacement of the Intertropical Convergence Zone/South Pacific High system between ~3.8 and 3.5 Ma. After 3.5 Ma, we record a second major phase of thermocline shoaling, which points to the ITCZ/SPH‐system movement toward its modern position along with the gradual cooling of the Northern Hemisphere and its associated glaciation.
Supplement to:
Ronge, Thomas A; Nürnberg, Dirk; Tiedemann, Ralf (2020): Plio‐Pleistocene Variability of the East Pacific Thermocline and Atmospheric Systems. Paleoceanography and Paleoclimatology, 35(1), e2019PA003758, https://doi.org/10.1029/2019PA003758
Coverage:
Median Latitude: -21.358983 * Median Longitude: -81.436080 * South-bound Latitude: -21.359010 * West-bound Longitude: -81.436160 * North-bound Latitude: -21.358960 * East-bound Longitude: -81.436000
Date/Time Start: 2002-04-22T13:45:00 * Date/Time End: 2002-04-24T08:45:00
Minimum Elevation: -1323.7 m * Maximum Elevation: -1322.5 m
Event(s):
202-1236A * Latitude: -21.358980 * Longitude: -81.436000 * Date/Time Start: 2002-04-22T13:45:00 * Date/Time End: 2002-04-23T13:40:00 * Elevation: -1323.7 m * Penetration: 207.7 m * Recovery: 197.23 m * Location: South Pacific Ocean * Campaign: Leg202 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 24 cores; 207.7 m cored; 0 m drilled; 95 % recovery
202-1236B * Latitude: -21.359010 * Longitude: -81.436080 * Date/Time Start: 2002-04-23T13:40:00 * Date/Time End: 2002-04-24T08:45:00 * Elevation: -1322.5 m * Penetration: 122.8 m * Recovery: 125.1 m * Location: South Pacific Ocean * Campaign: Leg202 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 122.8 m cored; 0 m drilled; 101.9 % recovery
202-1236C * Latitude: -21.358960 * Longitude: -81.436160 * Date/Time: 2002-04-24T08:45:00 * Elevation: -1322.5 m * Penetration: 167.3 m * Recovery: 167.74 m * Location: South Pacific Ocean * Campaign: Leg202 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 18 cores; 164.5 m cored; 2.8 m drilled; 102 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventRonge, Thomas A
2Sample code/labelSample labelRonge, Thomas ADSDP/ODP/IODP sample designation
3Depth, compositeDepth compmcdRonge, Thomas A
4AGEAgeka BPRonge, Thomas AGeocode
5Globorotalia inflata, Magnesium/Calcium ratioG. inflata Mg/Cammol/molRonge, Thomas A
6Mixed layer temperatureMLT°CRonge, Thomas ACalculated from Mg/Ca ratios (Groeneveld and Chiessi, 2011)G. inflata
7Trilobatus sacculifer, Manganese/Calcium ratioT. sacculifer Mn/Cammol/molRonge, Thomas A
8Sea surface temperature, annual meanSST (1-12)°CRonge, Thomas ACalculated from Mg/Ca ratios (Anand et al., 2003)T. sacculifer
9Globorotalia tumida, Magnesium/Calcium ratioG. tumida Mg/Cammol/molRonge, Thomas A
10Photic Zone temperaturePZT°CRonge, Thomas ACalculated from Mg/Ca ratios (Anand et al., 2003)G. tumida
Size:
702 data points

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