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 from October 1966 through January 2023 and sea ice from October 1978 through January 2023.

本数据集的核心参数为积雪覆盖范围与海冰范围，二者均源自扫描多通道微波辐射计（SMMR），以及DMSP-F8、DMSP-F11、DMSP-F13与DMSP-F17卫星搭载的专用传感器微波成像仪（SSM/I）和专用传感器微波成像仪/声迹探测器（SSMIS）的亮温数据。上述数据采用北半球等面积地球格网2.0（EASE-Grid 2.0）投影格式发布，网格单元尺寸为25×25千米。本产品旨在提供连续一致的周度时间序列数据集，其中积雪覆盖数据的时间跨度为1966年10月至2023年1月，海冰数据的时间跨度为1978年10月至2023年1月。