Radiocarbon variability in the western North Atlantic during the last deglaciation
|Title||Radiocarbon variability in the western North Atlantic during the last deglaciation|
|Publication Type||Journal Article|
|Year of Publication||2005|
|Authors||Robinson, L. F., Adkins J. F., Keigwin L. D., Southon J., Fernandez D. P., Wang S. L., & Scheirer D. S.|
|Type of Article||Article|
|Keywords||1705; age calibration; cal kyr bp; climate-change; deep-sea corals; glacial maximum; intermediate water; Keck / AMS Lab; millennial-scale changes; Research; southern-ocean; surface-temperature; thermohaline circulation|
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 Northem-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.