Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent, Version 4

The main parameters for this data set are snow cover and sea ice extent; both parameters are derived from SMMR and DMSP-F8, -F11, -F13, and -F17 SSM/I and SSMIS brightness temperature data. These data are provided on the Northern Hemisphere EASE-Grid 2.0 projection and at a grid cell size of 25 x 25 km. This product is designed to provide a consistent weekly time series of snow cover starting in October 1966 and sea ice starting in October 1978.

本数据集的核心参数为积雪覆盖范围与海冰范围，两类参数均源自扫描多通道微波辐射计（SMMR）以及国防气象卫星计划（DMSP）F8、F11、F13、F17卫星搭载的专用微波成像仪（SSM/I）和专用微波成像/测深仪（SSMIS）所获取的亮温数据。该数据集采用北半球EASE-Grid 2.0投影格式，网格单元尺寸为25×25千米。本产品旨在提供一套连续一致的周度时间序列数据集，其中积雪覆盖范围数据起始于1966年10月，海冰范围数据起始于1978年10月。