MIS 5e Southern Ocean September sea-ice concentrations and summer sea-surface temperatures reconstructed from marine sediment cores using a MAT diatom transfer function ...

• Main Authors: Chadwick, Matthew, Allen, Claire Susannah, Crosta, Xavier
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Diatom assemblage; Last Interglacial; modern analogue technique; sea ice concentration; Sea surface temperature; Sediment cores; Southern Ocean; transfer function; Event label; Latitude of event; Longitude of event; Elevation of event; DEPTH, sediment/rock; AGE; Sea ice concentration, September; Sea surface temperature, summer; Reference/source; Drilling/drill rig; Gravity corer; Piston corer; Calypso Corer; Composite Core; Age model, EDC3 EPICA Ice Dome C, Parrenin et al., 2007; Age model according to Lisiecki & Raymo 2005 [LR04]; Modern analog technique MAT; Exp318; ELT17; JR20080221; MD130; NBP9802; Joides Resolution; Eltanin; James Clark Ross; Marion Dufresne 1995; Nathaniel B. Palmer; EPICA; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.936573; https://doi.pangaea.de/10.1594/PANGAEA.936573

Marine Isotope Stage (MIS) 5e is the latest period when global atmospheric temperatures were warmer than present and global sea levels were higher than present. Environmental conditions during MIS 5e therefore represent an important 'process analogue' for understanding the climatic mechanisms and responses active under future anthropogenic warming. MIS 5e diatom assemblages were reconstructed for nine Southern Ocean marine sediment cores (ANTA91-8, ELT17-9, MD03-2603, NBP9802-04, PC509, TPC287, TPC288, TPC290 & U1361A). A modern analog technique (MAT) transfer function (Crosta et al. 1998) was applied to the diatom assemblages to reconstruct the MIS 5e September sea-ice concentration (SIC) and summer (January – March) sea-surface temperature (SSST) for each sample. The MAT compares the relative abundances of 33 diatom species in each MIS 5e sample to the abundances of the same species in a modern reference dataset composed of 257 surface sediment samples (modern analogs) from the SO. Modern conditions ...