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Warratz, Grit; Henrich, Rüdiger; Voigt, Ines; Chiessi, Cristiano Mazur; Kuhn, Gerhard; Lantzsch, Hendrik (2017): Different analysis of sediment core GeoB13823-2, GeoB13824-1 and GeoB13861-1 from the Argentine continental margin [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.874957, Supplement to: Warratz, G et al. (2017): Deglacial changes in the strength of deep southern component water and sediment supply at the Argentine continental margin. Paleoceanography, 32(8), 796-812, https://doi.org/10.1002/2016PA003079

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Abstract:
The deep southern component water (SCW), comprising Lower Circumpolar Deep Water (LCDW) and Antarctic Bottom Water (AABW), is a major component of the global oceanic circulation. It has been suggested that the deep Atlantic water mass structure changed significantly during the last glacial/interglacial cycle. However, deep SCW source-proximal records remain sparse. Here we present three coherent deep SCW paleo-current records from the deep Argentine continental margin shedding light on deep-water circulation and SCW flow strength in the Southwest Atlantic since the Last Glacial Maximum (LGM). Based on coherently increased sortable silt values, we propose enhanced deep SCW flow strength from 14 to 10 cal ka BP relative to the early deglacial/LGM and the Holocene. We propose a direct influence of deep northern component water (NCW) on deep SCW flow strength due to vertical narrowing of deep SCW spreading concurrent with a migration of the high-energetic LCDW/AABW interface occupying our core sites. We suggest a shoaled NCW until 13 cal ka BP, thereby providing space for deep SCW spreading that resulted in reduced carbonate preservation at our core sites. Only from 13 cal ka BP on, increased carbonate content indicates that NCW expanded vertically leading to a deeper NCW-SCW interface. This NCW expansion changed deep-water properties in the deep Southwest Atlantic causing enhanced carbonate preservation at our core sites. We further show that southern-sourced terrigenous sediment-supply to our core sites was uninterrupted since the LGM due to a persistent deep SCW flow leading to contourite drifts at the Argentine continental margin.
Project(s):
Center for Marine Environmental Sciences (MARUM)
Coverage:
Median Latitude: -38.143613 * Median Longitude: -53.431768 * South-bound Latitude: -38.219000 * West-bound Longitude: -53.609833 * North-bound Latitude: -38.091833 * East-bound Longitude: -53.344000
Date/Time Start: 2009-06-03T12:47:00 * Date/Time End: 2009-06-28T00:51:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
14 datasets

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Datasets listed in this publication series

  1. Warratz, G; Henrich, R; Voigt, I et al. (2017): Bulk grain size of sediment core GeoB13823-2. https://doi.org/10.1594/PANGAEA.874941
  2. Warratz, G; Henrich, R; Voigt, I et al. (2017): Clay mineral determination of sediment core GeoB13823-2. https://doi.org/10.1594/PANGAEA.874944
  3. Warratz, G; Henrich, R; Voigt, I et al. (2017): Total carbon, total oragnic carbon and carbonate contents of sediment core GeoB13823-2. https://doi.org/10.1594/PANGAEA.874949
  4. Warratz, G; Henrich, R; Voigt, I et al. (2017): Terrigenous sortable silt of sediment core GeoB13823-2. https://doi.org/10.1594/PANGAEA.874946
  5. Warratz, G; Henrich, R; Voigt, I et al. (2017): X-ray flourescence FeK of sediment core GeoB13823-2. https://doi.org/10.1594/PANGAEA.874951
  6. Warratz, G; Henrich, R; Voigt, I et al. (2017): Bulk grain size of sediment core GeoB13824-1. https://doi.org/10.1594/PANGAEA.874943
  7. Warratz, G; Henrich, R; Voigt, I et al. (2017): Terrigenous sortable silt of sediment core GeoB13824-1. https://doi.org/10.1594/PANGAEA.874947
  8. Warratz, G; Henrich, R; Voigt, I et al. (2017): X-ray flourescence FeK of sediment core GeoB13824-1. https://doi.org/10.1594/PANGAEA.874953
  9. Warratz, G; Henrich, R; Voigt, I et al. (2017): Bulk grain size of sediment core GeoB13861-1. https://doi.org/10.1594/PANGAEA.874942
  10. Warratz, G; Henrich, R; Voigt, I et al. (2017): Clay mineral determination of sediment core GeoB13861-1. https://doi.org/10.1594/PANGAEA.874945
  11. Warratz, G; Henrich, R; Voigt, I et al. (2017): Accelerator mass spectrometry radiocarbon dates and calibrated ages of sediment core GeoB13861-1 and GeoB13823-2. https://doi.org/10.1594/PANGAEA.874956
  12. Warratz, G; Henrich, R; Voigt, I et al. (2017): Total carbon, total oragnic carbon and carbonate contents of sediment core GeoB13861-1. https://doi.org/10.1594/PANGAEA.874950
  13. Warratz, G; Henrich, R; Voigt, I et al. (2017): Terrigenous sortable silt of sediment core GeoB13861-1. https://doi.org/10.1594/PANGAEA.874948
  14. Warratz, G; Henrich, R; Voigt, I et al. (2017): X-ray flourescence FeK of sediment core GeoB13861-1. https://doi.org/10.1594/PANGAEA.874952