Sentences with phrase «about increasing the albedo»

I seem to recall from a talk by Ken Caldeira this summer that one is talking about increasing the albedo by 10 % only over the region from 80 - 90 north latitude.

Not exact matches

Also about the ice - albedo feedback within 1K temperature oscillation the albedo will change of, let us say, 10 %, so for an increase of 1K the albedo will decrease from A = 0.3 to A = 0.27.

Ice sheet albedo forcing is estimated to have caused a global mean forcing of about — 3.2 W m — 2 (based on a range of several LGM simulations) and radiative forcing from increased atmospheric aerosols (primarily dust and vegetation) is estimated to have been about — 1 W m — 2 each.

is about geoengineering crops to increase their albedo.

So for example deglaciation warmed global mean temps by about 5 C over 10k years with a radiative forcing of about 6.5 W / m2 (total of both GHG increases and albedo decreases).

If clouds really formed more easily / frequently to reflect more sunlight as the planet warms (or, in this scenario, stopped forming, and stopped reflecting sunlight near the equator as the planet cools, providing an offset to the increased albedo to the north), then this scenario wouldn't come about.

Since we receive about 245 watts / m ^ 2 at the surface after allowing for geometry and albedo, and a doubling of CO2 from pre-industrial levels increases the energy rate by approx. 4.5 w / m ^ 2, what's needed is to to reduce the energy received by the Sun by that amount or more.

The albedo of all roofs can be increased, on average, by 0.25 and all paved surfaces can be increased by about 0.15.

The researchers believe this will increase a city's overall albedo by about 0.10.

Again, I do not see much to get excited about here, particularly when considering that the albedo increase from a 1 % increase in cloud cover would more than offset this decrease.

From the last glacial max — CO2 forcing had about a 2W / m2 increase and ice sheet albedo change amounted to some 25W / m2 less reflected SW..

For example, I show in «The Tropical Thunderstorm Hypothesis» that the change from clear to cumulus conditions increases the albedo by about 60 w / m2, a large effect.

The galactic cosmic ray issue is not just about if it may cause an increase in clouds but how it may contribute to an increase in major volcanic activity which would have major climatic due to those items effecting albedo.

A CO2 doubling is about a 1 % increase in forcing and the albedo feedback of that forcing decreases at a faster rate than the forcing increases.

Simulating the variation of the ice sheet's albedo using a regional climate model — Modèle Atmosphérique Régionale (MAR), which some members of the team helped develop — indicated that increasing temperatures and melting accompanied by snow grain growth and greater bare ice exposure account for about half the decline, the scientists report.

Their belief came about because the optical physics of aerosols, originating from Sagan and introduced to climate modelling by his ex-students, Lacis and Hansen in 1974 at GISS / NAS, predicts the cloud part of «global dimming», the increase of albedo by aerosols supposed to hide present CO2 - AGW.

Furthermore, since clouds only account for about 0.2 of that 0.3 albedo, it would take about a 5 % increase in the current albedo due to clouds in order to cancel.

What is presumably meant is that if you increase the albedo from, say, 0.30 to 0.31, then this would produce about the same magnitude forcing (opposite in sign) as doubling CO2.

It means that that tipping point that we all talked about (which happens to coincide with an increase earth albedo) and which started in 2003 has been again confirmed.

A 1 percentage point decrease in albedo (30 % to 29 %) would increase the black - body radiative equilibrium temperature about 1 °C, about equal to a doubling of atmospheric CO2.

MY climatic play — It is very low solar and as a result an increase in albedo / lower sea surface temperatures which will bring about global cooling from here.

If we assume all else is equal except the subject of this posting, namely the Atmospheric «greenhouse» effect, and assign the Earth System an albedo equal to that of the Moon, using my modified Carleton spreadsheet, that would increase my 255 K to about 272 K, reducing the 33ºC to be accounted for down to about 16ºC.

Lots of argument about whether the increase damps [mutes] itself by increasing albedo.

An albedo decrease of only 1 %, bringing the Earth's albedo from 30 % to 29 %, would cause an increase in the black - body radiative equilibrium temperature of about 1 °C, a highly significant value, roughly equivalent to the direct radiative effect of a doubling of the atmospheric CO2 concentration.

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.

Might I suggest that everyone read the proposal by Latham, Salter et al about using atomised water sprays — more hygroscopic nuclei in deficient areas of the ocean should raise albedo by increasing stratocumulus cover in the boundary layer — to cool selected areas?