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Data Publisher for Earth & Environmental Science

Yamamoto, Masanobu; Bova, Samantha C; Rosenthal, Yair; Kikuchi, Sohei: IODP Site 363-U1486 age model model and biomarker records during the past 1.68 million years [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.980726 (dataset in review)

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Abstract:
Enhanced Pacific meridional and zonal temperature gradients from ~2 to 1 million years ago (Ma) and the subsequent shift of glacial cycles in the Mid-Pleistocene Transition (MPT) from 1.2 to 0.7 Ma are remarkable in Pleistocene climate history. However, their influence on Indo-Pacific Warm Pool hydroclimate is unclear despite its global importance. Here we study the response of Papua New Guinea precipitation to changes in climate background conditions during these transitions using 1.68 million years of records of leaf wax deuterium and carbon isotopes, and pyrogenic polycyclic aromatic hydrocarbons from the Bismarck Sea. Dry climates dominate at peak interglacials through the ~1.7 My record, likely in response to higher CO2 and smaller continental ice sheets that shifted the tropical rain belt northward. Interglacial fire activity intensified at ~1.25 Ma, indicating an increased severity of droughts possibly due to intensification of El Niño events.
Keyword(s):
Age model; Carbon isotopes; Fire activity; Hydroclimate; Hydrogen isotopes; Long-chain n-fatty acids; n-alkanes; Pleistocene; Polycyclic arimatic hydrocarbons
Project(s):
Integrated Ocean Drilling Program / International Ocean Discovery Program (IODP)
Funding:
Japan Society for the Promotion of Science (JSPS), grant/award no. 19H05595: JSPS KAKENHI
Japan Society for the Promotion of Science (JSPS), grant/award no. JPMXS05R2900001
National Science Foundation (NSF), grant/award no. OCE-1834208: Global and regional perspectives of Pleistocene paleoceanography in the western Pacific warm pool based on new sites from IODP Expedition 363
Coverage:
Median Latitude: -2.372419 * Median Longitude: 144.601244 * South-bound Latitude: -2.372473 * West-bound Longitude: 144.601150 * North-bound Latitude: -2.372280 * East-bound Longitude: 144.601330
Date/Time Start: 2016-11-14T06:00:00 * Date/Time End: 2016-11-17T00:18:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
3 datasets

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Datasets listed in this bundled publication

  1. Yamamoto, M; Bova, SC; Rosenthal, Y et al. (in review): Age model of IODP Site 363-U1486. https://doi.pangaea.de/10.1594/PANGAEA.980727
  2. Yamamoto, M; Bova, SC; Rosenthal, Y et al. (in review): Biomarkers and their isotope ratios of IODP Site 363-U1486. https://doi.pangaea.de/10.1594/PANGAEA.980730
  3. Yamamoto, M; Bova, SC; Rosenthal, Y et al. (in review): Stable carbon and oxygen isotope ratios of Cibicidoides of IODP Site 363-U1486. https://doi.pangaea.de/10.1594/PANGAEA.980728