Articles | Volume 15, issue 23
Research article
10 Dec 2018
Research article |  | 10 Dec 2018

Evolution of 231Pa and 230Th in overflow waters of the North Atlantic

Feifei Deng, Gideon M. Henderson, Maxi Castrillejo, Fiz F. Perez, and Reiner Steinfeldt

Data sets

GEOTRACES GA01 (cruise GEOVIDE) 231Pa, 230Th and 232Th activities Deng, F., Henderson, G., Castrillejo, M., and Browning, T. J.

Short summary
To better use Pa / Th to reconstruct deep water ventilation rate, we assessed controls on 230Th and 231Pa in the northern North Atlantic. With extended optimum multi-parameter analysis and CFC-based water-mass age, we found the imprint of young overflow water on Th and Pa and enhanced scavenging near the seafloor. A significantly higher advective loss of Pa to the south relative to Th in the Atlantic was estimated, supporting the use of Pa / Th for assessing basin-scale meridional transport.
Final-revised paper