Articles | Volume 12, issue 24
Research article
21 Dec 2015
Research article |  | 21 Dec 2015

Coastal upwelling off Peru and Mauritania inferred from helium isotope disequilibrium

R. Steinfeldt, J. Sültenfuß, M. Dengler, T. Fischer, and M. Rhein


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
ED: Reconsider after major revisions (01 Nov 2015) by Hermann Bange
AR by Reiner Steinfeldt on behalf of the Authors (17 Nov 2015)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (19 Nov 2015) by Hermann Bange
RR by Anonymous Referee #2 (30 Nov 2015)
ED: Publish subject to technical corrections (02 Dec 2015) by Hermann Bange
Short summary
The coastal upwelling systems, e.g. off Peru and Mauritania, are key regions for the emissions of climate relevant trace gases from the ocean into the atmosphere. Here, gases and nutrients are transported into the ocean mixed layer from below. The upwelling velocities, however, are too small to be measured directly. We use the enhancement of helium-3 in upwelled waters to quantify the vertical velocity, which varies between 1.0 and 2.5 metres per day in the coastal regions.
Final-revised paper