Cannariato, Kevin G; Ravelo, Ana Christina (1997): Planktonic foraminiferal stable isotopic record of ODP Site 138-851 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.868711, Supplement to: Cannariato, KG; Ravelo, AC (1997): Pliocene-Pleistocene evolution of eastern tropical Pacific surface water circulation and thermocline depth. Paleoceanography, 12(6), 805-820, https://doi.org/10.1029/97PA02514
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
We evaluated the response of eastern equatorial Pacific upper water column hydrography to the Panama seaway closure and the initiation of large-scale northern hemisphere glaciation, The d18O gradient between Globorotalia tumida and Globigerinoides sacculifer indicates a general shoaling of the thermocline between 4.2 and 3.0 Ma which may be related to a recorded decrease in southeast trade wind strength. The d13C gradients suggest that surface water nutrient concentrations have increased during the last 5 Myr and that upwelling intermediate waters began to change sources at ~3.2 Ma. Changes in the trans-Pacific east-west temperature and nutrient gradients at 4.0 and 1.5 Ma are coincident with the seaway closure and a major phase of northern hemisphere glaciation. Changes in the sensitivity of surface circulation to Milankovitch forcing, d18O records linearly related to orbital variations only after 3.2 Ma, are associated with the seaway closure. Pleistocene initiation of 100 and 41 kyr cycles in the thermocline depth proxy may suggest that the hydrographic response to Milankovitch forcing is enhanced by air-sea interactions which maintain the relatively steep Pleistocene trans-Pacific gradients. The d13C records are dominated by the 41 kyr period and are usually coherent with high-latitude climate, suggesting that associated changes in the global carbon reservoir dominate the tropical d13C signals.
Other version:
Cannariato, Kevin G; Ravelo, Ana Christina (1997): Eastern tropical Pacific changes in circulation. NOAA National Centers for Environmental Information, https://doi.org/10.25921/H2XR-YQ34
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 2.770283 * Longitude: -110.571633
Date/Time Start: 1991-06-16T00:00:00 * Date/Time End: 1991-06-21T00:00:00
Minimum DEPTH, sediment/rock: 0.03 m * Maximum DEPTH, sediment/rock: 96.81 m
Event(s):
138-851 * Latitude: 2.770283 * Longitude: -110.571633 * Date/Time Start: 1991-06-16T00:00:00 * Date/Time End: 1991-06-21T00:00:00 * Elevation: -3760.3 m * Penetration: 799.9 m * Recovery: 797.9 m * Location: North Pacific Ocean * Campaign: Leg138 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 86 cores; 797.4 m cored; 0 m drilled; 100.1% recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Cannariato, Kevin G | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Cannariato, Kevin G | Geocode – rmcd | |
| 3 | AGE | Age | ka BP | Cannariato, Kevin G | Geocode | |
| 4 | Globigerinoides sacculifer, δ13C | G. sacculifer δ13C | ‰ PDB | Cannariato, Kevin G | Mass spectrometer Fisons Optima | size fraction 355-425 µm |
| 5 | Globigerinoides sacculifer, δ18O | G. sacculifer δ18O | ‰ PDB | Cannariato, Kevin G | Mass spectrometer Fisons Optima | size fraction 355-425 µm |
| 6 | Globorotalia tumida, δ13C | G. tumida δ13C | ‰ PDB | Cannariato, Kevin G | Mass spectrometer Fisons Optima | size fraction 355-425 µm |
| 7 | Globorotalia tumida, δ18O | G. tumida δ18O | ‰ PDB | Cannariato, Kevin G | Mass spectrometer Fisons Optima | size fraction 355-425 µm |
| 8 | Neogloboquadrina dutertrei, δ13C | N. dutertrei δ13C | ‰ PDB | Cannariato, Kevin G | Mass spectrometer Fisons Optima | size fraction 355-425 µm |
| 9 | Neogloboquadrina dutertrei, δ18O | N. dutertrei δ18O | ‰ PDB | Cannariato, Kevin G | Mass spectrometer Fisons Optima | size fraction 355-425 µm |
| 10 | Neogloboquadrina humerosa, δ13C | N. humerosa δ13C | ‰ PDB | Cannariato, Kevin G | Mass spectrometer Fisons Optima | size fraction 355-425 µm |
| 11 | Neogloboquadrina humerosa, δ18O | N. humerosa δ18O | ‰ PDB | Cannariato, Kevin G | Mass spectrometer Fisons Optima | size fraction 355-425 µm |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6521 data points
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