Martínez, José Ignacio; De Deckker, Patrick; Chivas, Allan R (1997): Stable oxygen and carbon isotope ratios of Globigerinoides sacculifer of ODP Hole 134-828A from the Southwest Pacific (Table 2) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.690363, Supplement to: Martínez, JI et al. (1997): New estimates for salinity changes in the Western Pacific Warm Pool during the Last Glacial Maximum: oxygen-isotope evidence. Marine Micropaleontology, 32(3-4), 311-340, https://doi.org/10.1016/S0377-8398(97)00029-7
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Abstract:
Oxygen-isotope analyses of planktonic foraminifera from 57 western Pacific deep-sea cores are compared for the Holocene and the Last Glacial Maximum (LGM). Carbonate dissolution, sedimentation rates/bioturbation, sample density, and vital effects are assessed before the sea-surface salinity signal of these records is reconstructed. Average glacial-interglacial Delta delta18O values in the western Pacific are found to be close to those in the Atlantic Ocean (1.76 ‰ in the Pacific compared to 1.80 ‰ in the Atlantic), questioning previous suggestions of a larger salinity difference between the Atlantic and the Pacific oceans during the LGM. During the LGM, sea-surface salinity was higher in the western Pacific than today (by >~1 ‰), implying that evaporation minus precipitation was higher all over the region. The minimum change in sea-surface salinity occurred around the equator at the core of the Western Pacific Warm Pool. Holocene high-amplitude, high-frequency fluctuations in planktonic delta18O records north and south of the present limits of the Western Pacific Warm Pool are indicative of sea-surface temperature and/or sea-surface salinity variations related to its expansion and contraction at the scale of thousands of years. Such high-amplitude, high-frequency fluctuations at the edge of the WPWP are best documented in the delta18O signal of ODP Hole 828A offshore Vanuatu, so far the best high-resolution record for the western Pacific.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -15.288000 * Longitude: 166.284000
Date/Time Start: 1990-10-25T11:00:00 * Date/Time End: 1990-10-26T21:30:00
Minimum DEPTH, sediment/rock: 0.45 m * Maximum DEPTH, sediment/rock: 61.62 m
Event(s):
134-828A * Latitude: -15.288000 * Longitude: 166.284000 * Date/Time Start: 1990-10-25T11:00:00 * Date/Time End: 1990-10-26T21:30:00 * Elevation: -3098.0 m * Penetration: 111.4 m * Recovery: 101.34 m * Location: Coral Sea * Campaign: Leg134 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 15 cores; 111.4 m cored; 0 m drilled; 91 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Sample code/label | Sample label | Martínez, José Ignacio | DSDP/ODP/IODP sample designation | ||
| 3 | Globigerinoides sacculifer, δ18O | G. sacculifer δ18O | ‰ PDB | Martínez, José Ignacio | Mass spectrometer Finnigan MAT 251 | 4-10 specimens of total weight c. 200 mg, 150-250 µm fraction |
| 4 | Globigerinoides sacculifer, δ13C | G. sacculifer δ13C | ‰ PDB | Martínez, José Ignacio | Mass spectrometer Finnigan MAT 251 | 4-10 specimens of total weight c. 200 mg, 150-250 µm fraction |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
657 data points