Brief Communication: Mesoscale and submesoscale dynamics of marginal ice zone from sequential SAR observations

New possibility for horizontal current retrieval over marginal ice zone (MIZ) from sequential Sentinel-1 synthetic aperture radar (SAR) images is demonstrated. Daily overlapping SAR acquisitions made within 70–85° of latitude at time intervals < 1 hour enable obtaining high-resolution velocity fi...

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Bibliographic Details
Main Authors: Kozlov, Igor E., Plotnikov, Evgeny V., Manucharyan, Georgy E.
Format: Text
Language:English
Published: 2020
Subjects:
Fram Strait
Sea ice
Online Access:https://doi.org/10.5194/tc-2020-126
https://tc.copernicus.org/preprints/tc-2020-126/
Description
Summary:New possibility for horizontal current retrieval over marginal ice zone (MIZ) from sequential Sentinel-1 synthetic aperture radar (SAR) images is demonstrated. Daily overlapping SAR acquisitions made within 70–85° of latitude at time intervals < 1 hour enable obtaining high-resolution velocity field and resolve MIZ dynamics down to submesoscales. An example taken from the Fram Strait MIZ reveals energetic mesoscale and submesoscale eddies and filaments with horizontal velocities up to 0.75 m s −1 , strong sea ice convergence and high vorticity values. Such observations are critical to monitor the current and future state of marginal ice zones in the polar oceans.

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