Radiocarbon variability in the western North Atlantic during the last deglaciation.
We present a detailed history of glacial to Holocene radiocarbon in the deep western North Atlantic from deep-sea corals and paired benthic-planktonic foraminifera. The deglaciation is marked by switches between radiocarbon-enriched and -depleted waters, leading to large radiocarbon gradients in the water column. These changes played an important role in modulating atmospheric radiocarbon. The deep-ocean record supports the notion of a bipolar seesaw with increased Northern-source deep-water formation linked to Northern Hemisphere warming and the reverse. In contrast, the more frequent radiocarbon variations in the intermediate/deep ocean are associated with roughly synchronous changes at the poles.
Robinson
Laura F
LF
California Institute of Technology, MS 100-23, 1200 East California Boulevard, Pasadena, CA 91125, USA. laurar@gps.caltech.edu
Adkins
Jess F
JF
Keigwin
Lloyd D
LD
Southon
John
J
Fernandez
Diego P
DP
Wang
S-L
SL
Scheirer
Daniel S
DS
D000818:Animals; D037421:Anthozoa; D001267:Atlantic Ocean; D002247:Carbon Isotopes; D002250:Carbon Radioisotopes; D002980:Climate; D056890:Eukaryota; D046448:Ice Cover; D013995:Time; D015048:Zooplankton
D002247:Carbon Isotopes; D002250:Carbon Radioisotopes