Sentences with phrase «cooling albedo effect»

And by knocking down trees, which absorb sunlight, a mammoth could cause more sun to be reflected, increasing the cooling albedo effect on the permafrost.

Not exact matches

Other research signals that the albedo effect «causes so much warming that permafrost thaws even despite the cooling from shrubs,» he said.

While plants also absorb carbon from the air, the team found that the warming power of water vapor and the albedo effect in particular far outweigh this cooling factor.

I would expect the albedo effect presented by clouds to be weak over the mostly snow / ice covered Antarctica, but Svensmark argues that the clouds here warm rather than cool the temperature.

So, clouds both warm and cool, and their overall effect upon climate depends upon the balance between albedo cooling and greenhouse warming.

I think that only illustrates the bizarre use of the global average and models that in effect suggest cutting down trees would increase albedo and cool the planet.

I am well aware of the cooling effect of atmospheric particulates etc (if I remember correctly isn't it properly called albedo?)

The fraction of the light that scatters back out to space is responsible for the increased albedo and the cooling effect from sulfate aerosols.

For instance, increasing cloud cover due to global warming may change the albedo, but this would be a feedback to a larger warming effect, rather than a cooling.

The bottom line is that uncertainties in the physics of aerosol effects (warming from black carbon, cooling from sulphates and nitrates, indirect effects on clouds, indirect effects on snow and ice albedo) and in the historical distributions, are really large (as acknowledged above).

There could still be regional cooling in places like in the north Atlantic, which could slowdown melting on Greenland, and give the world an opportunity to take advantage by putting the reduction of GHGs on the front burner asap to mitigate the effects of albedo reduction and sea level rise from that source, when the heat returns.

Global climate models have successfully predicted the rise in temperature as greenhouse gases increased, the cooling of the stratosphere as the troposphere warmed, polar amplification due the ice - albedo effect and other effects, greater increase in nighttime than in daytime temperatures, and the magnitude and duration of the cooling from the eruption of Mount Pinatubo.

It melts without having much cooling effect, and in short order there is net warming because of the reduced albedo of wet snow vs. dry snow and bare rock vs. snow cover.

If something triggers a cool spell, such as an orbital variation reducing incident sunlight, then water freezes at the poles, which increases the Earth's albedo, while the cooler oceans absorb more CO2, reducing the greenhouse effect.

It's negative because clearing rainforests to plant endless fields of identical crops increases the albedo, reflecting more sunlight and producing a slight cooling effect.

However, the albedo - induced cooling effect is expected to be small and was not detected in observed trends in the study by Matthews et al. (2004).

One of the biggest concerns is that these sudden forests will decrease the albedo (literally «whiteness») of the tundra where snow cover bounces solar radiation back into the atmosphere creating a cooling effect.

For instance the earth's global ocean already has an albedo close to zero so greenhouse gases are limited there and because GHGs modus operandi is restricting radiative cooling and the ocean is still free to cool evaporatively there is no first order significant effect of greenhouse gases over a liquid ocean.

Thus «cloud albedo effect» cooling is imaginary and could be heating.

We know that some clouds increase the earth's albedo and have a cooling effect.

The forcing is really a net albedo forcing from the varying ice extent, and the albedo has a positive feedback effect both on itself and with CO2 / H2O as the earth cools into an Ice Age.

Warming from the BC - albedo effect was similar in magnitude to the cooling from the direct effect.

For example, removing dark boreal forests primarily leads to global cooling through the radiative effects of increasing local albedo [21 — 23].

This is fantasy physics probably aimed at justifying the imaginary -0.7 W / m ^ 2 «cloud albedo effect» cooling in AR4, just increased by Hansen et.

After NASA learnt there was no experimental evidence for «cloud albedo effect» cooling it created a fake explanation apparently to keep the idea in AR4.

So these hitherto unknown, or perhaps hypothetical, fields of waving barley in northern Canada and Siberia would also have a higher albedo than boreal forests whether or not they have snow cover, which would be a cooling effect.

As the CO2 and CH4 (methane) level goes up, H2O vapour in the atmosphere falls which — because H2O is 30 times more important than CO2 as a «greenhouse gas» offsets the effect of CO2 on temperature, while cloud cover and albedo increases because warmed moist air rises to form clouds, further cooling the world.

It seems that the most significant effect is actually not albedo there, but reduced evaporative cooling.

In February, the National Academies of Science released two major reports on geoengineering, one on carbon dioxide removal technologies (to draw down carbon dioxide from the atmosphere and hence reduce the greenhouse effect) and the other on «albedo modification» or solar radiation management technologies (to reflect a fraction of sunlight back to space and thereby cool the planet).

And, even this number is in some sense deceiving because increasing clouds actually has two effects: a cooling effect due to the increase in albedo and a warming effect due to a decrease in the outgoing IR («longwave») radiation.

The overall effect of the cloudiness on the earth is a cooling effect but there is enough warming due to the decrease in outgoing IR radiation that it offset a considerable fraction of the cooling effect due to the increase in albedo alone.

Atmospheric aerosol science is pretty thin, including their role in low - level (warming) and high - level (cooling) cloud development, PM agglomeration, PM and VOC oxidation, condensation and precipitation effecting albedo.

The more cooling comes from more ice extent with more albedo and more thawing because of more ice exposure to temperate land and more ice exposure to the effects of thawing by more salt water.

Therefore, the effect of warming in the arctic is cooling at the lower latitudes, from increased albedo from clouds and snow, and transportation of colder air from the arctic.

In the paper, the two main findings are said to be that: (1) the net local effect of the volatiles lost when trees are cut is cooling, and (2) that this volatiles effect is of similar magnitude to albedo and CO2 effects from deforestation.

For truly boreal systems (further north than Adirondacks), my understanding is that there is enough evidence for a strong warming albedo effect of forests (counter-acting the cooling effect of C sequestration) that we probably should not attribute carbon offsets to boreal reforestation based simply on carbon accounting of tree biomass.

The albedo effect surpasses the carbon effect in the energy balance, and the Earth cools when forests are removed.

If so that would leave the albedo effect to push the wet bulb temperature up, and the carbon storage effect to provide long term cooling.

Increases in forest cover generally cause cooling in the tropics where the ET effect dominates (Claussen et al. 2001) and warming in mid - and high - latitudes where the albedo effect is strong (Betts 2000).

Notable among these are Wentz et al. (2007), who suggest that the IPCC has failed to allow for two - thirds of the cooling effect of evaporation in its evaluation of the water vapor - feedback; and Spencer (2007), who points out that the cloud - albedo feedback, regarded by the IPCC as second in magnitude only to the water - vapor feedback, should in fact be negative rather than strongly positive.

The story revolves around a paper that Paul Crutzen (Nobel Prize winner for chemistry related to the CFC / ozone depletion link) has written about deliberately adding sulphate aerosols in the stratosphere to increase the albedo and cool the planet — analogous to the natural effects of volcanoes.

This could cause massive floods in some areas but might also block sunlight sufficiently to trigger major cooling along with the longer term effect of enhanced albedo of the expanded snow / ice area in the Northern Hemisphere.

That causes warmer and this continues until enough Arctic Ice is melted to allow Arctic Ocean Effect Snow to raise Albedo and cool the Earth.

As to a planet without water, the analysis is complicated by countervailing effects — the absence of water vapor and cloud water / ice reduces the greenhouse warming effect but the absence of clouds, snow and ice reduces the cooling effect of the Earth's albedo.