Radium Isotopes Across the Arctic Ocean Show Time Scales of Water Mass Ventilation and Increasing Shelf Inputs

Authors

Michiel Rutgers van der Loeff
Lauren Kipp, Rowan UniversityFollow
Matthew A. Charette
Willard S. Moore
Erin Black
Ingrid Stimac
Alexander Charkin
Dorothea Bauch
Ole Valk
Michael Karcher

Document Type

Article

Version Deposited

Published Version

Publication Date

9-11-2019

Publication Title

JGR Oceans

DOI

10.1029/2018JC013888

Abstract

The first full transarctic section of 228Ra in surface waters measured during GEOTRACES cruises PS94 and HLY1502 (2015) shows a consistent distribution with maximum activities in the transpolar drift. Activities in the central Arctic have increased from 2007 through 2011 to 2015. The increased 228Ra input is attributed to stronger wave action on shelves resulting from a longer ice-free season. A concomitant decrease in the 228Th/228Ra ratio likely results from more rapid transit of surface waters depleted in 228Th by scavenging over the shelf. The 228Ra activities observed in intermediate waters (

Comments

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License,

Recommended Citation

Rutgers van der Loeff, M., Kipp, L.E., Charette, M.A., Moore, W.S., Black, E.E., Stimac, I., Charkin, A., Bauch, D., Valk, O., Karcher, M., Krumpen, M., Casacuberta, N., Smethie, W., Rember, R. (2018) Radium isotopes across the Arctic Ocean show time scales of water mass ventilation and increasing shelf inputs. Journal of Geophysical Research: Oceans. DOI: 10.1029/2018JC013888

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.