Articles | Volume 16, issue 1
Ocean Sci., 16, 221–234, 2020
https://doi.org/10.5194/os-16-221-2020
Ocean Sci., 16, 221–234, 2020
https://doi.org/10.5194/os-16-221-2020

Research article 14 Feb 2020

Research article | 14 Feb 2020

Decrease in 230Th in the Amundsen Basin since 2007: far-field effect of increased scavenging on the shelf?

Ole Valk et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Ole Valk on behalf of the Authors (08 Nov 2019)  Author's response    Manuscript
ED: Publish subject to technical corrections (12 Dec 2019) by Matthew Hecht
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Short summary
After 2007 230Th decreased significantly in the central Amundsen Basin. This decrease is accompanied by a circulation change, indicated by changes in salinity. Ventilation of waters is most likely not the reason for the observed depletion in 230Th as atmospherically derived tracers do not reveal an increase in ventilation rate. It is suggested that these interior waters have undergone enhanced scavenging of Th during transit from Fram Strait and the Barents Sea to the central Amundsen Basin.