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.

本数据集提供北冰洋海冰年龄的周度估算结果，数据由遥感反演的海冰运动与海冰范围推导得到。
该数据集的时间覆盖范围为1984年1月至2019年12月。
如需获取最新数据，请参阅《Quicklook北极周度等面积可扩展地球网格（EASE-Grid）海冰年龄数据产品》（访问地址：https://nsidc.org/data/nsidc-0749）。
本数据集的核心参数为海冰年龄，计量单位为年。
数据采用地理参考netCDF（.nc）格式存储，同时附带PNG（.png）格式的预览图像。
每个netCDF文件包含52周的海冰年龄数据，以整数形式编码，采用12.5km分辨率北半球EASE-Grid网格的722×722格点子集。
引用信息如下：Tschudi, M.、W. N. Meier、J. S. Stewart、C. Fowler 与 J. Maslanik. 2019. 《EASE-Grid海冰年龄（版本4）》. 美国科罗拉多州博尔德市：美国国家航空航天局（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.