Dissolution index of Globigerina bulloides in recent and Last Glacial Maximum sediments, supplement to: Volbers, Andrea N A; Henrich, Rüdiger (2004): Calcium carbonate corrosiveness in the South Atlantic during the Last Glacial Maximum as inferred from changes in the preservation of Globigerina bulloides: A proxy to determine deep-water circulation patterns? Marine Geology, 204(1-2), 43-57

• Main Authors: Volbers, Andrea N A, Henrich, Rüdiger
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2004
• Subjects: Gravity corer Kiel type; Giant box corer; MultiCorer; Piston corer Kiel type; van Veen Grab; M6/6; M9/4; M12/1; M15/2; M16/1; M16/2; M20/2; M22/1; SO84; M23/1; M23/2; M23/3; M29/2; M29/3; JOPSII-6; JOPSII-8; M34/1; M34/2; M34/3; M38/2; M41/2; M41/3; Meteor 1986; Sonne; Victor Hensen; Geosciences, University of Bremen GeoB; South Atlantic in Late Quaternary Reconstruction of Budget and Currents SFB261; Antarctic; Van Veen; Antarc*; NADW; North Atlantic Deep Water; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.735719; https://doi.pangaea.de/10.1594/PANGAEA.735719

The modern Atlantic Ocean, dominated by the interactions of North Atlantic Deep Water (NADW) and Antarctic Bottom Water (AABW), plays a key role in redistributing heat from the Southern to the Northern Hemisphere. In order to reconstruct the evolution of the relative importance of these two water masses, the NADW/AABW transition, reflected by the calcite lysocline, was investigated by the Globigerina bulloides dissolution index (BDX?). The depth level of the Late Glacial Maximum (LGM) calcite lysocline was elevated by several hundred metres, indicating a more corrosive water mass present at modern NADW level. Overall, the small range of BDX? data and the gradual decrease in preservation below the calcite lysocline point to a less stratified Atlantic Ocean during the LGM. Similar preservation patterns in the West and East Atlantic demonstrate that the modern west–east asymmetry did not exist due to an expansion of southern deep waters compensating for the decrease in NADW formation.