No global warming presentation is complete without some pictures of snowpacks and glaciers melting away in alpine environments. The world is warming and the warmth is melting snow and ice in mountainous areas – seeing is believing, and finding pictures of melting snow is rather easy (just wait until spring every year)!
We conducted a search on the internet for “Global warming and snowpack” and nearly 70,000 sites appear with nearly all of them insisting that snowpacks the world over are being devastated by ongoing warming. The Technical Summary of the IPCC states:
“Decreases in snowpack have been documented in several regions worldwide based upon annual time series of mountain snow water equivalent and snow depth. Mountain snow can be sensitive to small changes in temperature, particularly in temperate climatic zones where the transition from rain to snow is generally closely associated with the altitude of the freezing level. Declines in mountain snowpack in western North America and in the Swiss Alps are largest at lower, warmer elevations. Mountain snow water equivalent has declined since 1950 at 75% of the stations monitored in western North America. Mountain snow depth has also declined in the Alps and in southeastern Australia. Direct observations of snow depth are too limited to determine changes in the Andes, but temperature measurements suggest that the altitude where snow occurs (above the snow line) has probably risen in mountainous regions of South America.”
The IPCC is widely cited by the websites – clearly there is a consensus that snowpacks are declining, and who can argue with a consensus?