Has anyone ever thought that the present trend of posibive temperature feedback could suddely reverse? thoughts?
------
No it will not reverse suddenly. The radiative climate forcing from human caused greenhouse gas emissions are about 3 times as strong as that of the Milankovitch cycles that trigger the coming and going of ice ages.
The world is warming at least 10 times faster than when it came out of the last ice age.
It took 10,000 years to warm by 5 C. That averages 2,000 years for each 1 C warming.
Global average temperature has increased by 1 C in the last 140 years. Do the simple arithmetic. I got 14 times faster now.
That is because CO2 has likely NEVER increased this fast naturally.
Humans increased CO2 by over 80ppm in 60 years
Humans increased CO2 by 130ppm in 140 years
------
Nature caused CO2 increases over the last 450,000 years, from ice core data
80ppm increase -- took 50,000 years
110ppm increase -- 25,000 years
120ppm increase --- 20,000 years
60ppm increase --- 20,000 years
90ppm increase --- 15,000 years
100ppm increase --- 24,800 years
The numbers for 800,000 years would be similar, based on a graph, from ice core data going back that far.