Abstract
Dual-frequency precipitation radar (DPR) is a powerful instrument for remote sensing of sea waves but its application is yet limited. Measurements of a radar backscattered signal are made at small incidence angles and retrieval algorithms permit to retrieve mean square slopes (mss) of the sea surface. The combination of the DPR product and the sea surface wind speed (SSW) field retrieved from microwave radiometer and scatterometer data with a resolution of 5–10 km can be used to estimate the relationships between wind and waves, reveal the spatial features of the air–sea interaction in cyclones, atmospheric fronts, cold air outbreaks, and other meso- and synoptic-scale weather systems. For the first time, the DPR and microwave radiometer data were processed for extratropical cyclones. Changes of mss and wind in the areas of cyclonic activity were analyzed. A strong correlation of mss and near-surface wind characteristic was shown. Short wind-generated waves strongly affect mss and they rapidly respond to changes in the wind speed.
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