Winter tourism activities with hard limits to adaptation, particularly those that occur at sea level where less precipitation is expected to fall as snow , are at the highest risk from climate change and may experience irreversible impacts well before 2℃ of warming above pre-industrial levels  . During record warm winters, alpine ski resorts in eastern Canada experienced reductions in ski season lengths of between 11 and 17 d  and resorts in the northeast USA  experienced decreased skier visits by 11.6% and reductions in operational profits of 33% amounting to 40-52 million USD . Even with advanced snowmaking as an adaptation to warmer temperatures, average ski season lengths are projected to decrease 8%  to 73%  in Ontario, Canada  , 12%  to 22%  in Quebec, Canada , and 13%  to 45%  in the northeast USA  . Season length for snowmobiling and cross-country skiing is projected to decrease more dramatically , that is, by 80%  to 100%  by mid-century . The number of outdoor skating days may decrease by 34% in Toronto and Montreal, and 19% in Calgary, by 2090 under RCP8.5 . The skating season length for the Rideau Canal in Ottawa, Canada, a UNESCO World Heritage Site attracting 1.3 million visitors annually, may decrease by 3.8+2.0 d per decade with later opening dates of 2.6+1.5 d per decade .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report