Add sea ice layer

[elongano]

https://nsidc.org/data/NSIDC-0532/versions/1

Characteristics include the location of sea ice cover, sea ice age, day of melt onset, and status of melt onset. Data are gridded in the 25 km Equal-Area Scalable Earth Grid (EASE-Grid) 2.0 and provided as netCDF files.

Citation: Anderson, M., A. C. Bliss, and M. Tschudi. 2014. MEaSUREs Arctic Sea Ice Characterization Daily 25km EASE-Grid 2.0, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0532.001. [Date Accessed].