Evidence of Abrupt Transitions Between Sea Ice Dynamical Regimes in the East Greenland Marginal Ice Zone
Abstract
Sea ice modulates the energy exchange between the atmosphere and the ocean through its kinematics. Marginal ice zone (MIZ) dynamics are complex and are not well resolved in routine observations. Here, we investigate sea ice dynamics in the Greenland Sea MIZ using in situ and remote sensing Lagrangian drift datasets. These datasets provide a unique view into ice dynamics spanning spatial scales. We find evidence of tidal currents strongly affecting sub‐daily ice motion. Velocity anomalies show abrupt transitions aligned with gradients in seafloor topography, indicating changes in ocean currents. Remote‐sensed ice floe trajectories derived from moderate resolution satellite imagery provide a view of small‐scale variability across the Greenland continental shelf. Ice floe trajectories reveal a west‐east increasing velocity gradient imposed by the East Greenland Current, with maximum velocities aligned along the continental shelf edge. These results highlight the importance of small scale ocean variability for ice dynamics in the MIZ.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 31, 2023
- Source ID
- 10.1029/2023gl103558
Entities
People
- Angela Bliss
- Daniel Watkins
- Jennifer Hutchings
- Monica M. Wilhelmus
Organizations
- Brown University
- National Aeronautics and Space Administration
- National Science Foundation
- Office of Naval Research
- Oregon State University
- United States Department of Energy