Sentences with phrase «ice cover acts»

Not exact matches

[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?)

One Anonymous Bloke — The ice mass doesn't act so much as a cooling «force» as it does as a lid covering or insulating warmer water.

This has never happened before because the sea ice never retreated very much in the summer and the water temperature could not rise above zero because of the ice cover... The permafrost is acting as a cap for a very large amount of methane (CH4), which is sitting in the sediments underneath in the form of methane hydrates.

-- Not later than 18 months after the date of enactment of this section, the Administrator, taking into consideration the public health and environmental impacts of black carbon emissions, including the effects on global and regional warming, the Arctic, and other snow and ice - covered surfaces, shall propose regulations under the existing authorities of this Act to reduce emissions of black carbon or propose a finding that existing regulations promulgated pursuant to this Act adequately regulate black carbon emissions.

Because the Arctic is largely ice - covered year - round, it acts as a «refrigerator» for the earth, keeping the Arctic and the rest of the earth cooler than it would be without ice.

Microwave imagery must allow for variations in surface emissivity and can not act as a surrogate for air temperature over either snow - covered (Peterson et al., 2000) or sea - ice areas.

The retreat of a massive ice sheet that once covered much of northern Europe has been described for the first time, and researchers believe it may provide a sneak preview of how present - day ice sheets in Greenland and Antarctica will act in the face of global warming.