Mapping sea ice area of Liaodong bay for the 2009–2010 winter using MODIS and China environment satellite data

MODIS satellite products with 1km spatial resolution is utilizesd to retrieve the sea ice area in Liaodong bay and the environmental satellite with 30m spatial resolution is also used to correct the edge of sea ice. Combined with the atmosphere temperature and Sea Surface Temperature (SST) of the numerical simulation product of ECMWF, sea ice variation in Liaodong bay is analyzed. It is shown that the environmental satellite can assist to determine the threshold for the algorithm and calculate the sea ice area more accurately. The variation of SST lagged behind temperature of atmosphere in Liaodong bay and the averaged daily temperature difference of sea surface was much less than that of atmosphere. Both of the area of sea ice and SST do not have direct correlation with the temperature of atmosphere in short term. The sea ice area has exponential function relationship with SST. The SST and sea ice area have good correlation with coefficient equal to -0.76 and significant at 1% level.