Coastal upwelling off Peru and Mauritania inferred from helium isotope disequilibrium

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

doi:https://doi.org/10.5194/bg-12-7519-2015

Articles | Volume 12, issue 24

https://doi.org/10.5194/bg-12-7519-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Biogeochemical processes, tropospheric chemistry and interactions...

https://doi.org/10.5194/bg-12-7519-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

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

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Final revised paper (published on 21 Dec 2015)
Preprint (discussion started on 14 Jul 2015)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC C3790: 'Review of R. Steinfeldt et al. bg-2015-226', Anonymous Referee #1, 24 Jul 2015
RC C4698: 'Review of BG-2015-226: R. Steinfeldt et al.', Anonymous Referee #2, 26 Aug 2015
- AC C6614: 'Reply to reviews', Reiner Steinfeldt, 16 Oct 2015
- AC C6615: 'revised manuscript', Reiner Steinfeldt, 16 Oct 2015
  - AC C6682: 'new revised manuscript', Reiner Steinfeldt, 19 Oct 2015
  - AC C6683: 'differnce file of old and new manuscript', Reiner Steinfeldt, 19 Oct 2015

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.