Sea Ice Drift Tracking In The Bohai Sea Based On GOCI

The Bohai Sea is located in the middle latitude region, which is an important economic development zone in China. However, sea ice drift causes significant economic losses in the winter. Sea ice drifting is difficult to track due to the long satellite repeat cycles in the polar region and the rapid changes in the Bohai Sea ice. The unique characteristics of the Geostationary Ocean Color Imager (GOCI) allow tracking of sea ice drift on a daily basis with the use of 1-h time interval images (eight images per day) and high spatial resolution (500 m). This study employed the GOCI data for daily 1-h sea ice drift tracking in the Bohai Sea using a maximum cross-correlation method. Sea ice drift monitoring is accomplished by tracking the distinct characteristics of sea ice samples. Experiments are based on GOCI data in 2011-2012 winter, and the results of sea ice drift tracking derived from the remote sensing images are validated by the in-situ data and historical data in Liaodong Bay. In addition, the roles of wind and current in the sea ice drift tracking are quantitatively analyzed.The wind-ice drag coefficient and current-ice drag coefficient and are 0.03 and 0.91, respectively, roughly corresponding to 2%～3% of the surface wind speed.