The science is pretty clear, jopo,
but, being jopo, you have managed to go to rutgers as a source, and make your own contrary "interpretation"
but then, jopo would see black when there was white
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you see less change in mid winter, because it is cold then regardless
at spring NH apr-jun, you see the encroachment of warmer temps reducing snow extent
View attachment 831248
https://nsidc.org/cryosphere/sotc/snow_extent.html
Long-term Northern Hemisphere snow trends are somewhat mixed, but overall show decreases in metrics such as snow cover extent, snow water equivalent, and snow depth (
Kunkel et al. 2016). Findings include a negative trend in maximum seasonal snow depth between the winter of 1960-1961 and the winter of 2014-2015. The trend is especially strong in North America, and apparent to a lesser extent in European stations discussed in the study.