Sea surface temperature reconstruction for sediment core KH-10-7 COR1GC from the Conrad Rise, Southern Ocean ...

• Main Authors: Orme, Lisa C, Crosta, Xavier, Miettinen, Arto, Divine, Dmitry V, Husum, Katrine, Isaksson, Elisabeth, Wacker, Lukas, Mohan, Rahul, Ther, Oliver, Ikehara, Minoru
• Format: Dataset
• Language: English
• Published: PANGAEA 2020
• Subjects: Deglaciation; diatoms; Holocene; Sea surface temperature; Southern Ocean; DEPTH, sediment/rock; AGE; Temperature, water; Temperature, water, minimum; Temperature, water, maximum; Sea ice concentration; Gravity corer; Age, calibrated; Calculated; ice core; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.913621; https://doi.pangaea.de/10.1594/PANGAEA.913621

Centennial and millennial scale variability of Southern Ocean temperature is poorly known, due to both short instrumental records and sparsely distributed high-resolution temperature reconstructions, with evidence for past temperature variability instead coming mainly from ice core records. Here we present a high-resolution (~ 60 year), diatom-based sea-surface temperature (SST) reconstruction from the western Indian sector of the Southern Ocean that spans the interval 14.2 to 1.0 ka BP (calibrated kiloyears before present). During the late deglaciation, the new SST record shows cool temperatures at 14.2–12.9 ka BP and gradual warming between 12.9–11.6 ka BP in phase with atmospheric temperature evolution. This supports that the temperature of the Southern Ocean during the deglaciation was linked with a complex combination of processes and drivers associated with reorganisations of atmospheric and oceanic circulation patterns. Specifically, we suggest that Southern Ocean surface warming coincided, within the ...