Intrahalocline eddies in the Amundsen Basin observed in  the distributed network from the MOSAiC expedition

Quintanilla-Zurita, Alejandra; Rabe, Benjamin; Wekerle, Claudia; Kanzow, Torsten; Kuznetsov, Ivan; Torres-Valdes, Sinhue; Pallàs-Sanz, Enric; Fang, Ying-Chih

doi:10.5194/os-22-305-2026

Articles | Volume 22, issue 1

https://doi.org/10.5194/os-22-305-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/os-22-305-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 1

Research article

|

29 Jan 2026

Research article |

| 29 Jan 2026

Intrahalocline eddies in the Amundsen Basin observed in the distributed network from the MOSAiC expedition

Alejandra Quintanilla-Zurita, Benjamin Rabe, Claudia Wekerle, Torsten Kanzow, Ivan Kuznetsov, Sinhue Torres-Valdes, Enric Pallàs-Sanz, and Ying-Chih Fang

Data sets

Observations from Autonomous Ocean Flux Buoy 45 deployed at site L3 during the MOSAiC transpolar drift, Arctic Basin, 2019-2020 Tim Stanton and Bill Shaw https://doi.org/10.18739/A26W96B3T

Raw data of continuous VM-ADCP (vessel-mounted Acoustic Doppler Current Profiler) profile during POLARSTERN cruise PS122/1 Sandra Tippenhauer and Markus Rex https://doi.org/10.1594/PANGAEA.916092

Ice Tethered Profiler observations: Vertical profiles of temperature, salinity, oxygen, and ocean velocity from an Ice Tethered Profiler buoy system [ITP 94, ITP 102, ITP 111] John M. Toole et al. https://doi.org/10.7289/v5mw2f7x

Physical oceanography based on ship CTD during POLARSTERN cruise PS122 Sandra Tippenhauer et al. https://doi.org/10.1594/PANGAEA.959963

Short summary

During a year-long Arctic expedition, we discovered nine underwater eddies beneath the sea ice in the central Arctic Ocean. These hidden structures form within a layered part of the ocean just below the surface and may reshape water layers and transport heat, freshwater, and nutrients. Using drifting ice platforms, we measured their size, depth, and motion to understand how they form.