One of the things we learned when oil collapsed a couple of years ago was that
there was a positive feedback loop embedded in declining oil prices.
Of course increasing water vapor in the atmosphere (the major greenhouse gas) would
be a positive feedback leading to more heating but apparently this is not the dominant effect.
While we may understand individual pieces — ie this particular
piece is a positive feedback — we have no clue as to how the whole thing adds up.
The net effect of all the processes not included in our simple
model is a positive feedback, which acts to increase the equilibrium climate sensitivity.
The most rewarding part of being a Clinical Instructor
is the positive feedback from the extern sites that complete the training of our students.
Absence of
clouds is a positive feedback; therefore clouds are a negative feedback; this has been the case throughout the geological history of the planet.
On theoretical grounds, a good candidate molecule would be p70S6K, because, in aggregate, the recently published findings suggest that there
is a positive feedback signal from p70S6K to mTOR (43, 44) and from mTOR to AKT (ref.
Lacking a time machine, the only possible alternative explanation that is consistent with the IPCC position is that the ~ 9 month lag of CO2 behind ST, LT and dCO2 / dt
is a positive feedback mechanism, and a minor one.
For example, in design thinking you develop a prototype that you use to get feedback — that's very qualitative — and lean startup makes it more rigorous, so you don't end up convincing yourself that the
feedback is positive feedback.