Sea ice and productivity changes over the last glacial  cycle in the Adélie Land region, East Antarctica,  based on diatom assemblage variability

Pesjak, Lea; McMinn, Andrew; Chase, Zanna; Bostock, Helen

doi:https://doi.org/10.5194/cp-19-419-2023

Articles | Volume 19, issue 2

https://doi.org/10.5194/cp-19-419-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Reconstructing Southern Ocean sea-ice dynamics on glacial-to-historical...

https://doi.org/10.5194/cp-19-419-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 2

Research article

|

14 Feb 2023

Research article |

| 14 Feb 2023

Sea ice and productivity changes over the last glacial cycle in the Adélie Land region, East Antarctica, based on diatom assemblage variability

Lea Pesjak, Andrew McMinn, Zanna Chase, and Helen Bostock

Supplement

https://doi.org/10.5194/cp-19-419-2023-supplement

Data sets

Relative abundance of diatom species, biogenic silica and Si/Al over the last ~140 kyr, from the East Antarctic continental margin L. Pesjak, A. McMinn, Z. Chase, and H. Bostock https://doi.org/10.1594/PANGAEA.946549

Short summary

This study uses diatom assemblages, biogenic silica and Si/Al data over the last 140 kyr from core TAN1302-44 (64°54' S, 144°32' E) to define glacial-to-interglacial paleoenvironments near Antarctica with respect to sea ice duration and ocean circulation. It has found that the sea ice season increased gradually during the last glacial, reaching a maximum before decreasing at the end of MIS 2. Following this, Circumpolar Deep Water increased relative to other times prior to ice sheet retreat.