Re: Antactica is melting too
Precession? Ok, sure; lets go there . . .
Over a period of ~71.6 years, the earth's axis rotates or “precedes” approximately 1 degree with respect to the plane of the elliptic. The largest effect this has on our climate is to shift the relationship of seasons to our calendar by ~24.3 hours, or a bit more than one day. So, spring (or any other season) arrives a bit sooner every year. In ~6400 years, the seasons will have shifted with respect to today by 90 degrees, in ~12.9k yrs they will have shifted 180 degrees, so that what is now winter will be summer, and continue on to a full cycle in ~25.8k yrs.
To put this in perspective, in ~1650, the beginning of the last “mini ice age,” the seasons were shifted by a whopping ~5 days from where they are today.
Is the Earth’s axial precession a factor with respect to climate? Undoubtably, just not in a way that has any bearing on the types of change that we are already experiencing from pumping somewhere north of 10 gigatonnes (yes, that’s billions of tons) of CO2 every year into the atmosphere.
Is CO2 production the only problem producing an abnormal and accelerating warming effect? No, but it dwarfs all other sources by orders of magnitude, including (and especially) precession.