Articles | Volume 22, issue 5
https://doi.org/10.5194/os-22-2779-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-22-2779-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
11 Sep 2026
Research article |
| 11 Sep 2026
| 11 Sep 2026
Enhanced water mass mixing in Fram Strait in 2020 and elevated circulation timescales of Atlantic-derived waters in 2021 based on transient tracers I-129 and U-236
Marcel Scheiwiller
CORRESPONDING AUTHOR
Department of Environmental Systems Science, ETHZ, Zürich, Switzerland
Anne-Marie Wefing
Norwegian Polar Institute, Tromsø, Norway
Habacuc Pérez-Tribouillier
Department of Environmental Systems Science, ETHZ, Zürich, Switzerland
Laboratory of Ion Beam Physics, Department of Physics, ETHZ, Zürich, Switzerland
Christof Vockenhuber
Department of Environmental Systems Science, ETHZ, Zürich, Switzerland
Laboratory of Ion Beam Physics, Department of Physics, ETHZ, Zürich, Switzerland
Paul A. Dodd
Norwegian Polar Institute, Tromsø, Norway
Justin P. Gwynn
Norwegian Radiation and Nuclear Safety Authority, Tromsø, Norway
Núria Casacuberta
CORRESPONDING AUTHOR
Department of Environmental Systems Science, ETHZ, Zürich, Switzerland
Laboratory of Ion Beam Physics, Department of Physics, ETHZ, Zürich, Switzerland
Institute of Marine Sciences (ICM-CSIC), Barcelona, Spain
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Short summary
We used man-made chemical markers to study how warm Atlantic origin water moves through the Arctic Ocean. Comparing Fram Strait observations from 2016 to 2021, we found stronger mixing in 2020 and longer transit times in 2021. This variability matters because these waters carry heat into the Arctic Ocean, intensifying its warming. Our findings help improve predictions of the Arctic Ocean climate response and its wider effects on ocean circulation.
We used man-made chemical markers to study how warm Atlantic origin water moves through the...
