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Riethdorf, Jan-Rainer; Max, Lars; Nürnberg, Dirk; Lembke-Jene, Lester; Tiedemann, Ralf (2013): Stable isotopes, Mg/Ca-ratios, and biogenic opal of five sediment cores from the subarctic northwest Pacific. PANGAEA, https://doi.org/10.1594/PANGAEA.786258, Supplement to: Riethdorf, J-R et al. (2013): Deglacial development of (sub) sea surface temperature and salinity in the subarctic northwest Pacific: Implications for upper-ocean stratification. Paleoceanography, 28(1), 91-104, https://doi.org/10.1002/palo.20014

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Abstract:
Based on models and proxy data it has been proposed that salinity-driven stratification weakened in the subarctic North Pacific during the last deglaciation, which potentially contributed to the deglacial rise in atmospheric carbon dioxide. We present high-resolution subsurface temperature (TMg/Ca) and subsurface salinity-approximating (d18Oivc-sw) records across the last 20,000 years from the subarctic North Pacific and its marginal seas, derived from combined stable oxygen isotopes and Mg/Ca ratios of the planktonic foraminiferal species Neogloboquadrina pachyderma (sin.). Our results indicate regionally differing changes of subsurface conditions. During the Heinrich Stadial 1 and the Younger Dryas cold phases our sites were subject to reduced thermal stratification, brine rejection due to sea-ice formation, and increased advection of low-salinity water from the Alaskan Stream. In contrast, the Bølling-Allerød warm phase was characterized by strengthened thermal stratification, stronger sea-ice melting, and influence of surface waters that were less diluted by the Alaskan Stream. From direct comparison with alkenone-based sea surface temperature estimates (SSTUk'37), we suggest deglacial thermocline changes that were closely related to changes in seasonal contrasts and stratification of the mixed layer. The modern upper-ocean conditions seem to have developed only since the early Holocene.
Coverage:
Median Latitude: 55.303166 * Median Longitude: 165.628140 * South-bound Latitude: 49.375667 * West-bound Longitude: 152.877933 * North-bound Latitude: 58.875333 * East-bound Longitude: 170.698833
Date/Time Start: 2002-07-20T00:55:00 * Date/Time End: 2009-09-22T00:06:00
Comment:
For opal measurements of sediment core SO201-2-12 see doi:10.1594/PANGAEA.786197
Size:
14 datasets

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Datasets listed in this publication series

  1. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Opal of sediment core LV29-114-3. https://doi.org/10.1594/PANGAEA.786254
  2. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Opal of sediment core SO201-2-101. https://doi.org/10.1594/PANGAEA.786255
  3. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Opal of sediment core SO201-2-77. https://doi.org/10.1594/PANGAEA.786256
  4. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Opal of sediment core SO201-2-85. https://doi.org/10.1594/PANGAEA.786257
  5. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Stable isotopes measured on benthic foraminifers of sediment core LV29-114-3. https://doi.org/10.1594/PANGAEA.786244
  6. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Stable isotopes measured on benthic foraminifers of sediment core SO201-2-101. https://doi.org/10.1594/PANGAEA.786245
  7. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Stable isotopes measured on benthic foraminifers of sediment core SO201-2-12. https://doi.org/10.1594/PANGAEA.786246
  8. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Stable isotopes measured on benthic foraminifers of sediment core SO201-2-77. https://doi.org/10.1594/PANGAEA.786247
  9. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Stable isotopes measured on benthic foraminifers of sediment core SO201-2-85. https://doi.org/10.1594/PANGAEA.786248
  10. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Stable oxygen isotopes and ratios of magnesium and calcium measured on Neogloboquadrina pachyderma sinistralis of sediment core LV29-114-3. https://doi.org/10.1594/PANGAEA.786249
  11. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Stable oxygen isotopes and ratios of magnesium and calcium measured on Neogloboquadrina pachyderma sinistralis of sediment core SO201-2-101. https://doi.org/10.1594/PANGAEA.786250
  12. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Stable oxygen isotopes and ratios of magnesium and calcium measured on Neogloboquadrina pachyderma sinistralis of sediment core SO201-2-12. https://doi.org/10.1594/PANGAEA.786251
  13. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Stable oxygen isotopes and ratios of magnesium and calcium measured on Neogloboquadrina pachyderma sinistralis of sediment core SO201-2-77. https://doi.org/10.1594/PANGAEA.786252
  14. Riethdorf, J-R; Max, L; Nürnberg, D et al. (2013): Stable oxygen isotopes and ratios of magnesium and calcium measured on Neogloboquadrina pachyderma sinistralis of sediment core SO201-2-85. https://doi.org/10.1594/PANGAEA.786253