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Sadatzki, Henrik; Sarnthein, Michael; Andersen, Nils (2015): Stable isotope, UK'37, SST, chlorin, alkenone and TOC data of sediment cores GIK17927-2 and GIK17928-3 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.849813, Supplement to: Sadatzki, H et al. (2015): Changes in monsoon-driven upwelling in the South China Sea over glacial Terminations I and II: a multi-proxy record. International Journal of Earth Sciences, https://doi.org/10.1007/s00531-015-1227-6

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Abstract:
Upwelling intensity in the South China Sea has changed over glacial-interglacial cycles in response to orbital-scale changes in the East Asian Monsoon. Here, we evaluate new multi-proxy records of two sediment cores from the north-eastern South China Sea to uncover millennial-scale changes in winter monsoondriven upwelling over glacial Terminations I and II. On the basis of U/Th-based speleothem chronology, we compare these changes with sediment records of summer monsoondriven upwelling east of South Vietnam. Ocean upwelling is traced by reduced (UK'37-based) temperature and increased nutrient and productivity estimates of sea surface water (d13C on planktic foraminifera, accumulation rates of alkenones, chlorins, and total organic carbon). Accordingly, strong winter upwelling occurred north-west of Luzon (Philippines) during late Marine Isotope Stage 6.2, Heinrich (HS) and Greenland stadials (GS) HS-11, GS-26, GS-25, HS-1, and the Younger Dryas. During these stadials, summer upwelling decreased off South Vietnam and sea surface salinity reached a maximum suggesting a drop in monsoon rains, concurrent with speleothem records of aridity in China. In harmony with a stadial-to-interstadial see-saw pattern, winter upwelling off Luzon in turn was weak during interstadials, in particular those of glacial Terminations I and II, when summer upwelling culminated east of South Vietnam. Most likely, this upwelling terminated widespread deep-water stratification, coeval with the deglacial rise in atmospheric CO2. Yet, a synchronous maximum in precipitation fostered estuarine overturning circulation in the South China Sea, in particular as long as the Borneo Strait was closed when sea level dropped below -40 m.
Coverage:
Median Latitude: 17.761667 * Median Longitude: 119.599167 * South-bound Latitude: 17.251667 * West-bound Longitude: 119.453333 * North-bound Latitude: 18.271667 * East-bound Longitude: 119.745000
Date/Time Start: 1994-04-21T00:00:00 * Date/Time End: 1994-04-21T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
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Datasets listed in this publication series

  1. Sadatzki, H; Sarnthein, M; Andersen, N (2015): Chlorin, alkenone and TOC data of sediment core GIK17927-2. https://doi.org/10.1594/PANGAEA.849809
  2. Sadatzki, H; Sarnthein, M; Andersen, N (2015): Stable isotope, UK'37 and SST of sediment core GIK17927-2. https://doi.org/10.1594/PANGAEA.849811
  3. Sadatzki, H; Sarnthein, M; Andersen, N (2015): Chlorin and alkenone data of sediment core GIK17928-3. https://doi.org/10.1594/PANGAEA.849810
  4. Sadatzki, H; Sarnthein, M; Andersen, N (2015): Stable isotope, UK'37 and SST of sediment core GIK17928-3. https://doi.org/10.1594/PANGAEA.849812