Average yearly sea ice coverage for the PAL LTER region West of the Antarctic Peninsula derived from passive microwave satellite, 1979 - 2020.

Annual sea ice coverage derived from monthly sea ice coverages originally derived from passive microwave satellite measurements. Ice extent is defined as the area bounded by the 15% ice concentration contour which is determined by summing up all the pixel areas (nominally 25km by 25km) which have concentrations greater than 15%. This area inside the ice-edge is not necessarily covered by 100%.

本数据集的年度海冰覆盖范围，源自原始基于被动微波卫星测量（passive microwave satellite measurements）生成的月度海冰覆盖数据。海冰范围被定义为15%海冰浓度等值线所包围的区域，该区域通过累加所有海冰浓度高于15%的像素（标称尺寸为25km×25km）的面积得到。该冰缘内部的区域并非100%被海冰覆盖。