Kimble, Kristin; Herbert, Timothy D: Plio-Pleistocene alkenone sea surface temperature and productivity at eastern equatorial Pacific IODP Site 321-U1338 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.972783 (dataset in review)
Abstract:
Alkenone biomarker unsaturation estimates (Uk'37) of sea surface temperature (SST) and alkenone concentration and mass accumulation rate (C37total) data are obtained for eastern equatorial Pacific (EEP) Integrated Ocean Drilling Program Site 321-U1338. Newly acquired alkenone biomarker data were generated at Brown University according to sample preparation and analytical methods described in Herbert et al. (2021). The SST and productivity data are sampled at 3-kyr resolution and span four time intervals in the Plio-Pleistocene: a Pliocene interval (3.0-3.6 Ma), a Plio-Pleistocene interval (2.4-2.8 Ma), a mid-Pleistocene interval (1.4-1.7 Ma), and a Late Pleistocene interval (350-650 ka). Gradients in SST and productivity between the two EEP sites can be tracked over the four time intervals listed above.
Keyword(s):
Source:
Kimble, Kristin; Herbert, Timothy D; Jones, Colin (2024): Pliocene Weakening of Gradients in Temperature but Not in Productivity in the Eastern Equatorial Pacific. Paleoceanography and Paleoclimatology, 39(3), e2023PA004711, https://doi.org/10.1029/2023PA004711
References:
Herbert, Timothy D; Caballero-Gill, Rocio P; Novak, Joseph B (2021): A revised mid-Pliocene composite section centered on the M2 glacial event for ODP Site 846. Climate of the Past, 17(3), 1385-1394, https://doi.org/10.5194/cp-17-1385-2021
Müller, Peter J; Kirst, Georg; Ruhland, Götz; Von Storch, Isabel; Rosell-Melé, Antoni (1998): Calibration of the alkenone paleotemperature index UK'37 based on core-tops from the eastern South Atlantic and the global ocean (60°N-60°S). Geochimica et Cosmochimica Acta, 62(10), 1757-1772, https://doi.org/10.1016/S0016-7037(98)00097-0
Project(s):
Funding:
National Science Foundation (NSF), grant/award no. 1930651: A global climatic context (6.5 to 5 Ma) for the Mediterranean Messinian Salinity Crisis
Coverage:
Median Latitude: 2.507813 * Median Longitude: -117.969556 * South-bound Latitude: 2.507808 * West-bound Longitude: -117.969737 * North-bound Latitude: 2.507820 * East-bound Longitude: -117.969372
Minimum DEPTH, sediment/rock: 3.55 m * Maximum DEPTH, sediment/rock: 44.33 m
Event(s):
321-U1338A * Latitude: 2.507808 * Longitude: -117.969372 * Elevation: -4210.8 m * Recovery: 345.96 m * Campaign: Exp321 (Pacific Equatorial Age Transect II / Juan de Fuca) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 44 cores; 410 m cored; 84.38 % recovered; 0 m drilled; 410 m penetrated
321-U1338B * Latitude: 2.507820 * Longitude: -117.969560 * Elevation: -4209.9 m * Recovery: 417.18 m * Campaign: Exp321 (Pacific Equatorial Age Transect II / Juan de Fuca) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 45 cores; 413.6 m cored; 100.87 % recovered; 2.5 m drilled; 416.1 m penetrated
321-U1338C * Latitude: 2.507812 * Longitude: -117.969737 * Elevation: -4212.7 m * Recovery: 432.48 m * Campaign: Exp321 (Pacific Equatorial Age Transect II / Juan de Fuca) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 47 cores; 414.4 m cored; 104.36 % recovered; 0 m drilled; 414.4 m penetrated
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Kimble, Kristin | |||
| 2 | Reference/source | Reference | Kimble, Kristin | |||
| 3 | Sample code/label | Sample label | Kimble, Kristin | DSDP/ODP/IODP sample designation | ||
| 4 | DEPTH, sediment/rock | Depth sed | m | Kimble, Kristin | Geocode – mbsf | |
| 5 | Depth, composite | Depth comp | mcd | Kimble, Kristin | ||
| 6 | AGE | Age | ka BP | Kimble, Kristin | Geocode | |
| 7 | Alkenone, unsaturation index UK'37 | UK'37 | Kimble, Kristin | Gas Chromatograph with Flame Ionization Detector (GC-FID), Agilent Technologies, HP 6890 | ||
| 8 | Sea surface temperature | SST | °C | Kimble, Kristin | Calculated from UK'37 (Müller et al, 1998) | Sample preparation according to Herbert et al. (2021) |
| 9 | Alkenone, C37 per unit sediment mass | C37/sed | µg/g | Kimble, Kristin | Gas Chromatograph with Flame Ionization Detector (GC-FID), Agilent Technologies, HP 6890 | total; Sample preparation according to Herbert et al. (2021) |
| 10 | Accumulation rate, alkenone C37 | Acc rate C37 | µg/cm2/ka | Kimble, Kristin | total | |
| 11 | Alkenone, C37, logarithm | C37 log | Kimble, Kristin | log(C37 total MAR) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
4707 data points
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