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\begin{document}

\title{Observing floe-scale sea ice motion in the Greenland Sea marginal ice
zone during summer}



\author[1]{Daniel Mark Watkins}%
\author[1]{Ellen Buckley}%
\author[1]{Minki Kim}%
\author[1]{Monica Martinez Wilhelmus}%
\affil[1]{Affiliation not available}%


\vspace{-1em}



  
  \date{June 07, 2024}


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\begin{abstract}
The Fram Strait is a key region for ice export, linking the Arctic with
the world ocean. We present floe-scale observations of sea ice motion in
the Fram Strait marginal ice zone (MIZ) derived from moderate-scale
optical imagery spanning the 2003-2020 period. Tracked ice floes provide
Lagrangian measures of ice motion during the spring and summer. We show
that the floe size distribution affects the rotation rates and
fluctuating velocities of sea ice floes. Using simulations based on a
quasi-geostrophic ocean model and a discrete element sea ice model, we
show that ocean eddy forcing alone can produce the distinct non-Gaussian
velocity anomaly distributions seen in observations. The scale of the
velocity distributions decreases with increasing floe size and with
increasing distance from the ice edge. Similarly, we show that the
rotation rate distribution in both observations and simulations narrows
with increasing floe size. Finally, we show that the deformation rates
measured from tracked MIZ ice floes reproduce the power law scaling seen
in the central Arctic, with the deformation rate decreasing as the scale
of observations increases. The observations presented here provide a new
avenue for sea ice model development and validation in the summer MIZ.%
\end{abstract}%



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