Wegwerth, Antje; Arz, Helge Wolfgang; Kaiser, Jerome; Winckler, Gisela; Lembke-Jene, Lester; Rigalleau, Vincent; Ruggieri, Nicoletta; Sadatzki, Henrik; Lamy, Frank (2025): Alkenone-based sea surface temperature during the last 8 Ma from IODP Site 383-U1543 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.982857
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2025-07-18 • DOI registered: 2025-08-16
Abstract:
This dataset presents a sea surface temperature (SST) record based on the alkenone UK'37 index from IODP Site 383-U1543 and PS97/114-2 in the Southeast Pacific. The SST record covers the last 8 Mrys (average resolution 25 ka) and dates back to the late Miocene. The sediment samples were collected from drill cores recovered during IODP 383 expedition "Dynamics of Pacific Antarctic Circumpolar Current (DYNAPACC)" with R/V JOIDES Resolution in 2019 (54°35.06ʹS, 76°40.59ʹW; 3,860 m water depth; Lamy et al., 2021; doi:10.14379/iodp.proc.383.2021). The SST younger than 0.45 Ma were reconstructed from sediment samples recovered during RV Polarstern Cruise PS97 (ANT-XXXI/3) from piston core114-2 ((54°34.73'S, 76°38.82'W; 3,869 m water depth; Lamy et al., 2016; doi:10.2312/BzPM_0701_2016). In addition to the reconstructed SST, the UK'37 and UK'38Me indices are presented in the dataset.
Supplement to:
Wegwerth, Antje; Arz, Helge Wolfgang; Kaiser, Jerome; Winckler, Gisela; Lembke-Jene, Lester; Rigalleau, Vincent; Ruggieri, Nicoletta; Sadatzki, Henrik; Lamy, Frank (2025): South Pacific sea surface temperature and global ocean circulation changes since the late Miocene. Nature Communications, 16 (6593), https://doi.org/10.1038/s41467-025-62037-w
References:
Conte, Maureen H; Eglinton, Geoffrey (1993): Alkenone and alkenoate distributions within the euphotic zone of the eastern North Atlantic: correlation with production temperature. Deep Sea Research Part I: Oceanographic Research Papers, 40(10), 1935-1961, https://doi.org/10.1016/0967-0637(93)90040-A
Lamy, Frank (2016): The Expedition PS97 of the Research Vessel POLARSTERN to the Drake Passage in 2016. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 701, 571 pp, https://doi.org/10.2312/BzPM_0701_2016
Lamy, Frank; Winckler, Gisela; Alvarez Zarikian, Carlos A; Expedition 383 Scientists (2021): Volume 383: Dynamics of the Pacific Antarctic Circumpolar Current (DYNAPACC). Proceedings of the International Ocean Discovery Program, International Ocean Discovery Program, 383, https://doi.org/10.14379/iodp.proc.383.2021
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
Prahl, Frederick G; Wakeham, Stuart G (1987): Calibration of unsaturation patterns in long-chain ketone compositions for paleotemperature assessment. Nature, 330(6146), 367-369, https://doi.org/10.1038/330367a0
Funding:
Deutsche Forschungsgemeinschaft, Bonn (DFG), grant/award no. AR 367/16-1: DFG Priority Programme 527 - SESPOD
Deutsche Forschungsgemeinschaft, Bonn (DFG), grant/award no. KA 3228/4-1: DFG Priority Programme 527 - SESPOD
Deutsche Forschungsgemeinschaft, Bonn (DFG), grant/award no. La1273/10-1: Dynamics of Pacific Antarctic Circumpolar Current (DYNAPACC)
Coverage:
Median Latitude: -54.581565 * Median Longitude: -76.661750 * South-bound Latitude: -54.584300 * West-bound Longitude: -76.676500 * North-bound Latitude: -54.578830 * East-bound Longitude: -76.647000
Date/Time Start: 2016-03-29T11:16:00 * Date/Time End: 2016-03-29T11:16:00
Minimum DEPTH, sediment/rock: 1.205 m * Maximum DEPTH, sediment/rock: 376.160 m
Event(s):
383-U1543 * Latitude: -54.584300 * Longitude: -76.676500 * Elevation: -4200.0 m * Campaign: EXP383 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE)
PS97/114-2 * Latitude: -54.578830 * Longitude: -76.647000 * Date/Time: 2016-03-29T11:16:00 * Elevation: -3869.3 m * Recovery: 22.37 m * Location: South Pacific Ocean * Campaign: PS97 (ANT-XXXI/3) * Basis: Polarstern * Method/Device: Piston corer (PC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Wegwerth, Antje | |||
| 2 | Latitude of event | Latitude | Wegwerth, Antje | |||
| 3 | Longitude of event | Longitude | Wegwerth, Antje | |||
| 4 | DEPTH, sediment/rock | Depth sed | m | Wegwerth, Antje | IODP Depth Scale Terminology | Geocode – mid depth CCSF |
| 5 | Age | Age | Ma | Wegwerth, Antje | According to Lamy et al. (2021) | |
| 6 | Alkenone, unsaturation index UK'37 | UK'37 | Wegwerth, Antje | Calculated according to Prahl and Wakeham (1987) | ||
| 7 | Sea surface temperature | SST | °C | Wegwerth, Antje | Calculated from UK'37 (Müller et al, 1998) | |
| 8 | Alkenone, unsaturation index UK'38Me | UK'38Me | Wegwerth, Antje | Calculated according to Conte & Eglinton (1993) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1157 data points