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原文传递 Evidence of Abrupt Transitions Between Sea Ice Dynamical Regimes in the East Greenland Marginal Ice Zone.

题名：	Evidence of Abrupt Transitions Between Sea Ice Dynamical Regimes in the East Greenland Marginal Ice Zone.
作者：	Watkins, D. M; Bliss, A. C; Hutchings, J. K; Wilhelmus, M. M.
摘要：	Sea ice modulates the energy exchange between the atmosphere and the ocean through 17 its kinematics. Marginal ice zone (MIZ) dynamics are complex and are not well resolved 18 in routine observations. Here, we investigate sea ice dynamics in the Greenland Sea MIZ 19 using in situ and remote sensing Lagrangian drift datasets. These datasets provide a unique 20 view into ice dynamics spanning spatial scales. We find evidence of tidal currents strongly 21 affecting sub-daily ice motion. Velocity anomalies show abrupt transitions aligned with 22 gradients in seafloor topography, indicating changes in ocean currents. Remote-sensed 23 ice floe trajectories derived from moderate resolution satellite imagery provide a view 24 of small-scale variability across the Greenland continental shelf. Ice floe trajectories re- 25 veal a west-east increasing velocity gradient imposed by the East Greenland Current, 26 with maximum velocities aligned along the continental shelf edge. These results high- 27 light the importance of small scale ocean variability for ice dynamics in the MIZ.
总页数：	16 pages