Upwelling and isolation in oxygen-depleted anticyclonic modewater eddies and implications for nitrate cycling

Karstensen, Johannes; Schütte, Florian; Pietri, Alice; Krahmann, Gerd; Fiedler, Björn; Grundle, Damian; Hauss, Helena; Körtzinger, Arne; Löscher, Carolin R.; Testor, Pierre; Vieira, Nuno; Visbeck, Martin

doi:https://doi.org/10.5194/bg-14-2167-2017

Articles | Volume 14, issue 8

https://doi.org/10.5194/bg-14-2167-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Hydrography, biogeochemistry, and biology of "dead-zone eddies"...

https://doi.org/10.5194/bg-14-2167-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 14, issue 8

Research article

|

27 Apr 2017

Research article |

| 27 Apr 2017

Upwelling and isolation in oxygen-depleted anticyclonic modewater eddies and implications for nitrate cycling

Johannes Karstensen, Florian Schütte, Alice Pietri, Gerd Krahmann, Björn Fiedler, Damian Grundle, Helena Hauss, Arne Körtzinger, Carolin R. Löscher, Pierre Testor, Nuno Vieira, and Martin Visbeck

Data sets

Upwelling and isolation in oxygen-depleted anticyclonic modewater eddies and implications for nitrate cycling J. Karstensen, F. Schütte, A. Pietri, G. Krahmann, B. Fiedler, D. Grundle, H. Hauss, A. Körtzinger, C. Löscher, P. Testor, N. Vieira, and M. Visbeck https://doi.org/10.1594/PANGAEA.860781

Short summary

High-resolution observational data from underwater gliders and ships are used to investigate drivers and pathways of nutrient upwelling in high-productive whirling ecosystems (eddies). The data suggest that the upwelling is created by the interaction of wind-induced internal waves with the local rotation of the eddy. Because of differences in nutrient and oxygen pathways, a low-oxygen core is established at shallow depth in the high-productive eddies.