Equal Area Scalable Earth Grid (EASE-Grid) Sea Ice Age, Version 4, 1984-2019

This data set provides weekly estimates of sea ice age for the Arctic Ocean derived from remotely sensed sea ice motion and sea ice extent. The temporal coverage for this data set is January 1984 through December 2019. For more recent data, see the Quicklook Arctic Weekly Equal Area Scalable Earth Grid (EASE-Grid) Sea Ice Age data product (https://nsidc.org/data/nsidc-0749). The main parameter for this data set is sea ice age, measured in years. Data are provided in georeferenced netCDF (.nc) format. PNG (.png) browse images are also provided. Each netCDF file contains 52 weeks of sea ice ages, coded as integers in a 722 x 722 gridded subset of the 12.5 km Northern Hemisphere EASE-Grid.
Tschudi, M., W. N. Meier, J. S. Stewart, C. Fowler, and J. Maslanik. 2019. EASE-Grid Sea Ice Age, Version 4. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/UTAV7490FEPB. 16 Nov 2020.

本数据集基于遥感获取的海冰运动与海冰范围数据，生成北冰洋海冰年龄的周度估算结果。
本数据集的时间覆盖范围为1984年1月至2019年12月。如需获取更新数据，请参阅快速浏览版北极周度等面积可缩放地球网格（Equal Area Scalable Earth Grid，EASE-Grid）海冰年龄数据集产品（https://nsidc.org/data/nsidc-0749）。
本数据集的核心参数为海冰年龄，单位为年。数据以地理参考的netCDF（.nc）格式提供，同时还提供PNG（.png）格式的浏览图像。每个netCDF文件包含52周的海冰年龄数据，以整数编码形式存储于12.5千米分辨率北半球EASE-Grid的722×722网格子集中。
Tschudi, M.、W. N. Meier、J. S. Stewart、C. Fowler与J. Maslanik，2019年。EASE-Grid海冰年龄数据集，第4版。美国科罗拉多州博尔德市：美国国家航空航天局（National Aeronautics and Space Administration, NASA）国家雪冰数据中心分布式主动存档中心。DOI：https://doi.org/10.5067/UTAV7490FEPB，2020年11月16日。