The dominance of negative
feedbacks over the millions of years that comprise the climate time series is surely the main reason that we all exist today?
Petit et al. (1999); IPCC (2001a), p. 202; Lorius et al. (1990); Pälike et al. (2006)(detecting the carbon cycle
feedback over millions of years).
Not exact matches
In addition, although the post 60s warming period is
over, it has allowed the principal green house gas, water vapour, to kick in with humidity, clouds, rain and snow depending on where you live to provide the negative
feedback that scientists use to explain the existence
of complex life on Earth for 550
million years.
Clearly the Earth's climate
feedbacks must be biased towards the negative
over reasonably significant time periods or the Earth's climate could not have maintained such a narrow range
of temperature
over millions of years.
My understanding is that the atmosphere warmed by about 6 degrees C from our current level, and that triggered increasing releases
of methane from clathrates in a positive
feedback fashion
over thousands
of years (or was it
millions of years??).