Paleoceanography and ice sheet variability offshore Wilkes Land, Antarctica – Part 2: Insights from Oligocene–Miocene dinoflagellate cyst assemblages

Bijl, Peter K.; Houben, Alexander J. P.; Hartman, Julian D.; Pross, Jörg; Salabarnada, Ariadna; Escutia, Carlota; Sangiorgi, Francesca

doi:https://doi.org/10.5194/cp-14-1015-2018

Articles | Volume 14, issue 7

https://doi.org/10.5194/cp-14-1015-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Publications by EGU Medallists

https://doi.org/10.5194/cp-14-1015-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 14, issue 7

Research article

|

11 Jul 2018

Research article |

| 11 Jul 2018

Paleoceanography and ice sheet variability offshore Wilkes Land, Antarctica – Part 2: Insights from Oligocene–Miocene dinoflagellate cyst assemblages

Peter K. Bijl, Alexander J. P. Houben, Julian D. Hartman, Jörg Pross, Ariadna Salabarnada, Carlota Escutia, and Francesca Sangiorgi

Supplement

https://doi.org/10.5194/cp-14-1015-2018-supplement

Data sets

Palynological counts from the Oligocene-Miocene of IODP Site 318-U1356, Wilkes Land Margin, Antarctica P. K. Bijl, A. J. P. Houben, J. D. Hartmann, J. Pross, A. Salabarnada, C. Escutia, and F. Sangiorgi https://doi.org/10.1594/PANGAEA.890160

Short summary

We document Southern Ocean surface ocean conditions and changes therein during the Oligocene and Miocene (34–10 Myr ago). We infer profound long-term and short-term changes in ice-proximal oceanographic conditions: sea surface temperature, nutrient conditions and sea ice. Our results point to warm-temperate, oligotrophic, ice-proximal oceanographic conditions. These distinct oceanographic conditions may explain the high amplitude in inferred Oligocene–Miocene Antarctic ice volume changes.