Dissolution index of Globigerina bulloides in recent and Last Glacial Maximum sediments

DOI

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.

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

Identifier
DOI https://doi.org/10.1594/PANGAEA.735719
Related Identifier IsSupplementTo https://doi.org/10.1016/S0025-3227(03)00372-4
Related Identifier References https://nbn-resolving.org/urn:nbn:de:gbv:46-00101382-15
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.735719
Provenance
Creator Volbers, Andrea N A; Henrich, Rüdiger
Publisher PANGAEA
Publication Year 2004
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 2 datasets
Discipline Geosciences; Natural Sciences
Spatial Coverage (-53.703W, -37.832S, 17.543E, 29.177N); Walvis Ridge, Southeast Atlantic Ocean; Angola Basin; Walvis Ridge; Guinea Basin; Equatorial Atlantic; Brazil Basin; Romanche fracture zone; Cape Basin; Eastern Rio Grande Rise; Northern Rio Grande Rise; Cardno Seamount; Mid Atlantic Ridge; East Brazil Basin; Amazon Fan; Niger Sediment Fan; Namibia continental slope; off Canary Islands; South African margin; Southwest Walvis Ridge; Uruguay continental margin; Rio Grande Rise; Santos Plateau; Northern Brasil-Basin; Sierra Leone Rise; NE-Brazilian continental margin; Continental Slope off Rio Paraiba do Sul; south of Abrolhos Bank; Southern Cape Basin; Northern Cape Basin; Ceara Rise; Ascencion Island; Mid-Atlantic Ridge
Temporal Coverage Begin 1988-03-02T00:00:00Z
Temporal Coverage End 1998-05-09T23:22:00Z