Articles | Volume 16, issue 2
The Cryosphere, 16, 533–557, 2022
The Cryosphere, 16, 533–557, 2022

Research article 15 Feb 2022

Research article | 15 Feb 2022

A new state-dependent parameterization for the free drift of sea ice

Charles Brunette et al.

Data sets

Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors, Version 4 M. Tschudi, W. N. Meier , J. S. Stewart, C. Fowler, and J. Maslanik

NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 3 W. N. Meier, F. Fetterer, M. Savoie, S. Mallory, R. Duerr, and J. Stroeve

ERA5 hourly data on single levels from 1979 to present H. Hersbach, B. Bell, P. Berrisford, G. Biavati, A. Horányi, J. Muñoz Sabater, J. Nicolas, C. Peubey, R. Radu, I. Rozum, D. Schepers, A. Simmons, C. Soci, D. Dee, and J.-N. Thépaut

Arctic Ocean surface geostrophic circulation 2003-2014 ( Thomas W. K. Armitage, Sheldon Bacon, Andy L. Ridout, Alek A. Petty, Steven Wolbach, and Michel Tsamados

Short summary
Sea ice motion is a versatile parameter for monitoring the Arctic climate system. In this contribution, we use data from drifting buoys, winds, and ice thickness to parameterize the motion of sea ice in a free drift regime – i.e., flowing freely in response to the forcing from the winds and ocean currents. We show that including a dependence on sea ice thickness and taking into account a climatology of the surface ocean circulation significantly improves the accuracy of sea ice motion estimates.