Key points
• The tendencies of productivity increasing for the lower- and
higher-productivity ecosystems (>45°N) turned out to be
weaker than that of the whole.
• The productivity of the ecosystems (>45°N) proved to be
more sensitive to the snow-onset than snow-end phenology in their
neighboring than own sites.
• The eco-effect of neighboring snow phenology affecting ecosystem
productivity occurred more to north in North America but to south in
North Eurasia.