Data from Feb1997 to Dec2019
Only the high resolution data since 1997 is good enough for a detailed regional analysis.
The limited timespan of 23 years would only allow two true decadal means. Instead I created three 10 year means with a slight overlap. Over time they will drift apart until we get three true decades.
The exact region extents can seens on the map.
National Ice Center. 2008, updated daily. IMS Daily Northern Hemisphere Snow and Ice Analysis at 1 km, 4 km, and 24 km Resolutions, Version 1.1-1.3. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: https://doi.org/10.7265/N52R3PMC.