Climate change

If global warming is real then how come we still have winter?

Adding more CO2 results in band broadening - absorbance at the sides of the absorbance wavelength. Absorbance increases as ln(CO2) rather than as (CO2) as it would if it were not saturated. Not all transitions are saturated.

define "winter"

How come when I wear a thick woolly jumper I'm still colder at night than during the day?