Autumn/Winter snow cover is rapidly expanding in the Northern Hemisphere, but Spring/Summer snow cover is down. The decline in Spring/Summer snow cover is caused by pollution from places like China. Dark particulates settle on the snow, causing melting. Scientists have known this for years, but blame CO2 because they get paid to do that.
for a given forcing (soot) is twice as effective as CO2 in altering global surface air temperature. This indirect soot forcing may have contributed to global warming of the past century, including the trend toward early springs in the Northern Hemisphere
- James Hansen NASA
Tamino blames CO2 for this, because he understands nothing about science.