Sea-surface temperature and sea ice distribution of the Southern Ocean at the EPILOG Last Glacial Maximum ...

• Main Authors: Gersonde, Rainer, Crosta, Xavier, Abelmann, Andrea, Armand, Leanne K
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2005
• Subjects: Gravity corer Kiel type; Piston corer BGR type; ANT-IV/4; ANT-VI/3; ANT-VIII/3; ANT-IX/4; ANT-X/5; ANT-XI/2; ANT-XI/4; ANT-XIV/3; Polarstern; Multiproxy Approach for the Reconstruction of the Glacial Ocean surface MARGO; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Arctic; Antarctic; Southern Ocean; Pacific; Indian; Antarc*; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.728237; https://doi.pangaea.de/10.1594/PANGAEA.728237

Based on the quantitative study of diatoms and radiolarians, summer sea-surface temperature (SSST) and sea ice distribution were estimated from 122 sediment core localities in the Atlantic, Indian and Pacific sectors of the Southern Ocean to reconstruct the last glacial environment at the EPILOG (19.5-16.0 ka or 23 000-19 000 cal yr. B.P.) time-slice. The statistical methods applied include the Imbrie and Kipp Method, the Modern Analog Technique and the General Additive Model. Summer SSTs reveal greater surface-water cooling than reconstructed by CLIMAP (Geol. Soc. Am. Map Chart. Ser. MC-36 (1981) 1), reaching a maximum (4-5 °C) in the present Subantarctic Zone of the Atlantic and Indian sector. The reconstruction of maximum winter sea ice (WSI) extent is in accordance with CLIMAP, showing an expansion of the WSI field by around 100% compared to the present. Although only limited information is available, the data clearly show that CLIMAP strongly overestimated the glacial summer sea ice extent. As a result ... : Supplement to: Gersonde, Rainer; Crosta, Xavier; Abelmann, Andrea; Armand, Leanne K (2005): Sea-surface temperature and sea ice distribution of the Southern Ocean at the EPILOG Last Glacial Maximum: A circum-Antarctic view based on siliceous microfossil records. Quaternary Science Reviews, 24(7-9), 869-896 ...