3 degree increase would recreate the climate of the last epoch of
the Tertiary period, the Pliocene, 3 million years ago. The northern
hemisphere had no glaciers on its continents and sea levels were
25 metres higher. Warmer seas absorb more CO2.
On land huge
amounts of carbon are stored in the soil, some estimated 1600 gigatonnes,
more than double the entire carbon content of the atmosphere. As
soil warms this stored carbon is released ino the atmosphere. A
runaway positive feedback loop pours carbon into the atmsphere increasing
concenrations by 250 parts per million by 2100, increasing global
warming by another 1.5C
With new ‘'super-hurricanes'
growing from the continually warming sea, Houston would be gone
by 2045 and Australia uninhabitable. As the land burns the sea continues
to rise, 80% of arctic sea ice will be gone.