Southern Ocean marine sediment core sea-ice records for the last 150,000 years ...

• Main Authors: Chadwick, Matthew, Crosta, Xavier, Esper, Oliver, Kohfeld, Karen E
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Diatoms; Glacial - Interglacial; marine sediments; Sea ice; Southern Ocean; Event label; DEPTH, sediment/rock; AGE; Fragilariopsis curta and Fragilariopsis cylindrus; Sea ice concentration, winter; Sea ice cover duration; Reference/source; Composite Core; Piston corer; Piston corer BGR type; Gravity corer Kiel type; Core; Gravity corer; Calculated, see references; Leg177; ELT27; ANT-XVIII/5a; ANT-XXII/4; ANT-XXVI/2; ANT-VI/3; ANT-VIII/3; ANT-IX/4; ANT-X/5; ANT-XI/2; ANT-XI/4; SO136; Joides Resolution; Eltanin; Polarstern; Sonne; Past Global Changes - Cycles of Sea-Ice Dynamics in the Earth system PAGES_C-SIDE; Antarctic; Antarc*
• Online Access: https://dx.doi.org/10.1594/pangaea.943275; https://doi.pangaea.de/10.1594/PANGAEA.943275

Antarctic sea ice forms a critical part of the Southern Ocean and global climate system. The behaviour of Antarctic sea ice throughout the last glacial-interglacial (G-IG) cycle (12,000-130,000 years) allows us to investigate the interactions between sea ice and climate under a large range of mean climate states. Understanding both temporal and spatial variations in Antarctic sea ice across a G-IG cycle is crucial to better understanding the G-IG regulation of atmospheric CO2, ocean circulation, nutrient cycling and productivity. Published qualitative and quantitative records of G-IG sea-ice, which cover at least 30,000 of the last 150,000 years, are compiled from twenty four marine sediment cores. All records include the combined relative abundances of the two sea-ice related diatoms Fragilariopsis curta and F. cylindrus (FCC). The FCC proxy is a qualitative indicator of winter sea-ice presence (Gersonde and Zielinski, 2000). Fourteen of the core records also have quantitative reconstructions of winter ...