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\begin{document}

\title{Characterizing Deformation and Ridging in Shorefast Ice using Remote Sensing Techniques}



\author[1]{Kennedy Lange}%
\author[1]{Alice Bradley}%
\author[2]{Kyle Duncan}%
\author[3]{Sinéad L Farrell}%
\affil[1]{Geoscience Department, Williams College}%
\affil[2]{Earth System Science Interdisciplinary Center (ESSIC), University of Maryland}%
\affil[3]{Dept. of Geographical Sciences, University of Maryland}%


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  \date{May 24, 2024}


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\begin{abstract}
Sea ice ridges are an important morphological feature that stabilize
shorefast ice across the Northern Alaskan coastline. This stability is
important to local communities and ecosystems that rely on this habitat
for food security and safety. Investigating the development of shorefast
ice around Utqiagvik, AK, we describe an approach to identify grounded
ridges throughout the winter season. To do this, we utilize high
resolution altimetry data from NASA's ICESat-2 satellite which provides
unprecedented along-track detail that allows, for the first time, the
detection of individual pressure ridges. We apply the University of
Maryland Ridge Detection Algorithm (Duncan and Farrell, 2022) using
ICESat-2 elevation data to identify and calculate ridge sail heights
along each satellite track. From these heights, we estimate the depth of
the ridge using sail/keel height ratios described in the literature. The
calculated ridge depths are compared with high-resolution bathymetric
data (NCEI Digital Elevation Model Mosaic) to classify potentially
grounded ridges. This methodology for identifying and quantifying
grounded ridges in shorefast ice will improve our understanding of
coastal ice processes in a changing environment.~%
\end{abstract}%



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