Brief Communication: Mesoscale and submesoscale dynamics in the marginal ice zone from sequential synthetic aperture radar observations
2020
Abstract. New possibilities for horizontal current retrieval in
marginal ice zones (MIZs) from sequential Sentinel-1 synthetic aperture
radar (SAR) images are demonstrated. Daily overlapping SAR acquisitions
within 70–85 ∘ S/N at time intervals 1 h enable
estimation of high-resolution velocity fields, revealing MIZ dynamics down
to submesoscales. An example taken from the Fram Strait MIZ reveals
energetic eddies and filaments with Rossby numbers reaching O(1) magnitudes.
The SAR-derived velocity estimations at such high spatial resolution can be
critical for monitoring the evolving MIZ dynamics and model validation of
submesoscale processes in polar oceans.
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