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Regional Snow Extent

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.


Snow Extent change over time

Region: 12
Region: 5
Region: 9

Data used

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.