Sentences with phrase «by positive feedbacks triggered»

abrupt climate change occurring «over periods as short as decades or years,» which could be brought on by positive feedbacks triggered by such events as ice sheet collapse on a large scale, the collapse of part of the Gulf Stream, dieback of the Amazon forest, or coral reef die - off.

Not exact matches

Elowitz and Gurol Suel, then a postdoctoral researcher in Elowitz's lab, discovered that the decision to become competent is governed by random gene activity, which in turn triggers a positive feedback loop.

These are over and above those positive feedback mechanims triggered by evolving climate mechanisms.

If that CO2 release was in fact (partly) triggered by warming — a positive climate feedback — we need to know from what store it came and exactly how stable that spot looks today.

The steepness of these reductions curves is somewhat controversial because any calculation of a carbon budget which determines the steepness of the the needed reduction curve must make assumptions about when positive feedbacks in the climate system will be triggered by rising temperatures, yet these controversies are reflected in giving different probabilities about the likelihood of achieving a specific warming limit.

But I can't imagine them being triggered by culminating positive feedbacks from cyclic oscillations in the ocean / atmosphere.

It all starts with a small trigger (whatever the cause), that is fortified by responses which are strong positive feedbacks, but limited (self limiting, like ice sheets in the case of ice ages) in total effect.

This triggers a positive feedback by lowering the albedo of the ocean's surface and leading to more of the Sun's light being absorbed, amplifying the warming.

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??).