статья в журнале

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IEEE Geoscience and Remote Sensing Letters

ISSN:1545598

2026

Fan, Shengren³

Zhang, Biao³

10.1109/LGRS.2026.3657253

Polar lows (PLs) are maritime mesoscale cyclones that generate strong winds in high-latitude regions, posing significant threats to marine transportation. Synthetic aperture radar (SAR) observations of PLs are predominantly acquired in dual-polarization (HH + HV) mode, whereas existing SAR wind retrieval algorithms have been developed primarily for tropical cyclones (TCs) using VV- and VH-polarized SAR imagery, thereby limiting their applicability to PL conditions. To bridge this gap, this study presents the first SAR wind retrieval method specifically designed for PLs that exploits dual-polarization (HH + HV) observations. The proposed method estimates optimal wind speeds by minimizing a cost function that jointly integrates observed and simulated normalized radar cross sections (NRCSs) in both HH and HV polarizations. Wind speeds retrieved from 129 Sentinel-1 SAR images are validated against collocated Soil Moisture Active and Passive mission (SMAP) radiometer wind measurements, yielding a bias of 0.9 m/s and a root-mean-square error (RMSE) of 3.25 m/s. The results demonstrate that the proposed approach is capable of reliably capturing the high wind speeds associated with PLs. © 2004-2012 IEEE.

dual-polarization, Polar low, synthetic aperture radar (SAR), wind speed

2-s2.0-105028597859

Fan S., Zhang B., Kudryavtsev V. Dual-Polarization SAR Surface Wind Speed Retrieval in Polar Lows//IEEE Geoscience and Remote Sensing Letters.-2026.-DOI: 10.1109/LGRS.2026.3657253.