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?

2004 ◽  
Vol 204 (1-2) ◽  
pp. 43-57 ◽  
Author(s):  
A.N.A Volbers ◽  
R Henrich
1998 ◽  
Vol 13 (3) ◽  
pp. 298-310 ◽  
Author(s):  
Nina R. Catubig ◽  
D. E. Archer ◽  
Roger Francois ◽  
Peter deMenocal ◽  
Will Howard ◽  
...  

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Jacob N. W. Howe ◽  
Alexander M. Piotrowski ◽  
Taryn L. Noble ◽  
Stefan Mulitza ◽  
Cristiano M. Chiessi ◽  
...  

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Marit-Solveig Seidenkrantz ◽  
Antoon Kuijpers ◽  
Steffen Aagaard-Sørensen ◽  
Holger Lindgreen ◽  
Jesper Olsen ◽  
...  

AbstractThe Last Glacial Maximum (LGM, 23–19,000 year BP) designates a period of extensive glacial extent and very cold conditions on the Northern Hemisphere. The strength of ocean circulation during this period has been highly debated. Based on investigations of two marine sediment cores from the Davis Strait (1033 m water depth) and the northern Labrador Sea (2381 m), we demonstrate a significant influx of Atlantic-sourced water at both subsurface and intermediate depths during the LGM. Although surface-water conditions were cold and sea-ice loaded, the lower strata of the (proto) West Greenland Current carried a significant Atlantic (Irminger Sea-derived) Water signal, while at the deeper site the sea floor was swept by a water mass comparable with present Northeast Atlantic Deep Water. The persistent influx of these Atlantic-sourced waters entrained by boundary currents off SW Greenland demonstrates an active Atlantic Meridional Overturning Circulation during the LGM. Immediately after the LGM, deglaciation was characterized by a prominent deep-water ventilation event and potentially Labrador Sea Water formation, presumably related to brine formation and/or hyperpycnal meltwater flows. This was followed by a major re-arrangement of deep-water masses most likely linked to increased overflow at the Greenland-Scotland Ridge after ca 15 kyr BP.


Nature ◽  
2010 ◽  
Vol 468 (7320) ◽  
pp. 84-88 ◽  
Author(s):  
César Negre ◽  
Rainer Zahn ◽  
Alexander L. Thomas ◽  
Pere Masqué ◽  
Gideon M. Henderson ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document