Sentences with phrase «albedo feedback driven»

This chemical weathering process is too slow to damp out shorter - term fluctuations, and there are some complexities — glaciation can enhance the mechanical erosion that provides surface area for chemical weathering (some of which may be realized after a time delay — ie when the subsequent warming occurs — dramatically snow in a Snowball Earth scenario, where the frigid conditions essentially shut down all chemical weathering, allowing CO2 to build up to the point where it thaws the equatorial region, at which point runaway albedo feedback drives the Earth into a carbonic acid sauna, which ends via rapid carbonate rock formation), while lower sea level may increase the oxidation of organic C in sediments but also provide more land surface for erosion... etc..

Not exact matches

He then uses what information is available to quantify (in Watts per square meter) what radiative terms drive that temperature change (for the LGM this is primarily increased surface albedo from more ice / snow cover, and also changes in greenhouse gases... the former is treated as a forcing, not a feedback; also, the orbital variations which technically drive the process are rather small in the global mean).

[1] CO2 absorbs IR, is the main GHG, human emissions are increasing its concentration in the atmosphere, raising temperatures globally; the second GHG, water vapor, exists in equilibrium with water / ice, would precipitate out if not for the CO2, so acts as a feedback; since the oceans cover so much of the planet, water is a large positive feedback; melting snow and ice as the atmosphere warms decreases albedo, another positive feedback, biased toward the poles, which gives larger polar warming than the global average; decreasing the temperature gradient from the equator to the poles is reducing the driving forces for the jetstream; the jetstream's meanders are increasing in amplitude and slowing, just like the lower Missippi River where its driving gradient decreases; the larger slower meanders increase the amplitude and duration of blocking highs, increasing drought and extreme temperatures — and 30,000 + Europeans and 5,000 plus Russians die, and the US corn crop, Russian wheat crop, and Aussie wildland fire protection fails — or extreme rainfall floods the US, France, Pakistan, Thailand (driving up prices for disk drives — hows that for unexpected adverse impacts from AGW?)

I am under the impression that it is driven by CO2 mediated ice - loss that generates albedo changes resulting in positive feedbacks that increase further melting.

The effect of last summer's wind anomaly and ice - albedo feedback may be found in a number of publications, including ours: Zhang, J., R.W. Lindsay, M. Steele, and A. Schweiger, What drove the dramatic retreat of Arctic sea ice during summer 2007?

They are one driver of earth's orbital variations, which probably drive glacial cycles via ice - albedo and other feedbacks.

Is it the long - awaited, predicted and scientifically reasonable CO2 fertilization feedback effect on the oceans» vast biomass of CO2 - consuming cyanobacteria, albeit also driven by the (literally) «shit - loads» of nitrogen compounds the human race is also pumping into the oceans — thereby shifting sea surface albedos, reducing evaporation rates and troposphere relative humidities (ringing any bells here, bros)?

Clouds are negative feedback driven nucleation points — when daytime clouds start to form the albedo causes further cooling beneath them and heat - engine thunderstorms form from the updrafts of warm wet air lofted up to the stratosphere to efficiently cool and spread, creating a local convective cell that pulls heat out of the ocean (or the moist land or air) and moves it to a cold reservoir.

Sea level indicates it wasn't that warm 7000 years ago and it's right on the cusp of earlier rapid sea level rise, a tipping point, during which all external forcing bets are off because the climate system is hopping between two quasi-stable states driven by strong albedo feedback in the transition period.

Hansen & Sato [60] suggest adding slow feedbacks one by one, creating a series of increasingly comprehensive Earth system climate sensitivities; specifically, they successively move climate - driven changes in surface albedo, non-CO2 GHGs and CO2 into the feedback category, at which point the Earth system sensitivity is relevant to an external forcing such as changing solar irradiance or human - made forcings.