Satellite Monitoring of Blue-Ice Extent in Grove Mountains,Antarctica

The series images of moderate resolution imaging spectroradiomete(MODIS) and Landsat are used to track seasonal and interannual variations of blue-ice extent in the Grove Mountains on East Antarctica.We introduce the process of using MODIS mapping algorithm to separate and calculate the blue-ice,and summarize the variation regularity of annual blue-ice exposure.The area grows rapidly from September to December,and peaks by the middle or late of next January.Then,it declines from February to April.We also analyze the images of Landsat sensors,and separate the blue-ice by supervised classification combined with the sight modification.According to the comparison of the edge lines of blue-ice,we find that the blue-ice extent has the eastward trend.And the sensitivity of blue-ice areas related to the changes of climate and shortwave radicalization is also revealed.