Sea-ice distribution and ocean temperature variation in the Powell Basin and Scotia Sea, inferred from marine sediment cores PS118_63-1 and PS67/219-1
Fuente:
PANGAEA
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Format: | Dataset Open Access |
| Sprache: | en |
| Veröffentlicht: |
PANGAEA
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1867171377915625472 |
|---|---|
| author | Khoo, Wee Wei Esper, Oliver Xiao, Wenshen Hefter, Jens Müller, Juliane |
| author_facet | Khoo, Wee Wei Esper, Oliver Xiao, Wenshen Hefter, Jens Müller, Juliane |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Presently, there is a scarcity of coastal (paleo) sea-ice reconstructions for periods prior to the Last Glacial Maximum. In this study, we investigated sea ice and ocean temperature proxies from marine sediment core PS118_63-1 from the Powell Basin, NW Weddell Sea. Past sea-ice characteristics inferred from the sea-ice biomarker IPSO25, alongside phytoplankton biomarkers, TOC, biogenic opal estimates and diatom assemblages provide a continuous record of past sea-ice conditions and ocean temperature variability, back to the Penultimate Glacial (ca. 145 ka BP). Our results reveal a highly dynamic sea-ice environment, characterized by significant shifts from perennial (sea) ice cover to more seasonal sea-ice cover to open ocean conditions, with no significant glacial-interglacial ocean temperature variability in the Powell Basin. Furthermore, latitudinal tracking of sea-ice distribution and sea surface temperature differences is enabled when comparing diatom-inferred data from the marine sediment core PS67/219-1. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_965042 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sea-ice distribution and ocean temperature variation in the Powell Basin and Scotia Sea, inferred from marine sediment cores PS118_63-1 and PS67/219-1 Khoo, Wee Wei Esper, Oliver Xiao, Wenshen Hefter, Jens Müller, Juliane AWI_Paleo; Biomarkers; Last Interglacial; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Powell basin; Sea ice; Weddell Sea Presently, there is a scarcity of coastal (paleo) sea-ice reconstructions for periods prior to the Last Glacial Maximum. In this study, we investigated sea ice and ocean temperature proxies from marine sediment core PS118_63-1 from the Powell Basin, NW Weddell Sea. Past sea-ice characteristics inferred from the sea-ice biomarker IPSO25, alongside phytoplankton biomarkers, TOC, biogenic opal estimates and diatom assemblages provide a continuous record of past sea-ice conditions and ocean temperature variability, back to the Penultimate Glacial (ca. 145 ka BP). Our results reveal a highly dynamic sea-ice environment, characterized by significant shifts from perennial (sea) ice cover to more seasonal sea-ice cover to open ocean conditions, with no significant glacial-interglacial ocean temperature variability in the Powell Basin. Furthermore, latitudinal tracking of sea-ice distribution and sea surface temperature differences is enabled when comparing diatom-inferred data from the marine sediment core PS67/219-1. |
| title | Sea-ice distribution and ocean temperature variation in the Powell Basin and Scotia Sea, inferred from marine sediment cores PS118_63-1 and PS67/219-1 |
| topic | AWI_Paleo; Biomarkers; Last Interglacial; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Powell basin; Sea ice; Weddell Sea |
| url | https://doi.org/10.1594/PANGAEA.965042 |