Climate proxies in sediment core MD95-2010 ...

• Main Authors: Dokken, Trond, Jansen, Eystein
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1999
• Subjects: Calypso Corer; MD101; Marion Dufresne 1995; International Marine Global Change Study IMAGES; Dokken; Greenland; Greenland ice cores; Nordic Seas; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.735730; https://doi.pangaea.de/10.1594/PANGAEA.735730

High-amplitude, rapid climate fluctuations are common features of glacial times. The prominent changes in air temperature recorded in the Greenland ice cores (Dansgaard et al., 1993, doi:10.1038/339532a0; Grootes et al., 1993 doi:10.1038/366552a0) are coherent with shifts in the magnitude of the northward heat flux carried by the North Atlantic surface ocean (Bond et al., 1993, doi:10.1038/365143a0; Bond and Lotti, 1995, doi:10.1126/science.267.5200.1005); changes in the ocean's thermohaline circulation are a key component in many explanations of this climate flickering (Broecker, 1997, doi:10.1126/science.278.5343.1582). Here we use stable-isotope and other sedimentological data to reveal specific oceanic reorganizations during these rapid climate-change events. Deep water was generated more or less continuously in the Nordic Seas during the latter part of the last glacial period (60 to 10 thousand years ago), but by two different mechanisms. The deep-water formation occurred by convection in the open ocean ... : Supplement to: Dokken, Trond; Jansen, Eystein (1999): Rapid changes in the mechanism of ocean convection during the last glacial period. Nature, 401(6752), 458-461 ...