Sentences with phrase «clouds increase albedo»

The clouds increase albedo, but the clouds also block IR loss from the warm tropical ocean currents as they move into the polar oceans.

Not exact matches

They tend to believe that as the planet warms, low - level cloud cover will increase, thus increasing planetary albedo (overall reflectiveness of the Earth), offsetting the increased greenhouse effect and preventing a dangerous level of global warming from occurring.

[Response: weaker cosmic ray flux - > fewer low clouds - > decrease in sunlight reflected back to space), then you need to explain why the night temperatures appear to increase faster then day temperatures (for any amplification mechanism involving te albedo, you'd expect the opposite, as there is no sunlight to reflect on the dark side of the planet...).

There, the particles would spur the formation of new clouds or increase the albedo of existing clouds.

The factors that determine this asymmetry are various, involving ice albedo feedbacks, cloud feedbacks and other atmospheric processes, e.g., water vapor content increases approximately exponentially with temperature (Clausius - Clapeyron equation) so that the water vapor feedback gets stronger the warmer it is.

According to the skeptics, the solar irradiance isn't very important, it is the strength of the sun's magnetic field (that allows or stops cosmic rays from coming in which then causes more or less clouds, which increases or decreases the Earth's albedo, which then causes warming or cooling of the Earth's surface).

In our own modelling, we have improved the calculations to reduce the amount of numerical diffusion (which helped a lot), and increased resolution (which also helped), but changes to the ocean model also have a big impact, as do Arctic cloud processes and surface albedo parameterisations, so it gets complicated fast.

The idea was that the resulting increase in aerosol would increase the brightness and lifetime of low maritime clouds, increasing the planetary albedo.

Does more evaporation lead to more clouds and if so is the net effect of more clouds to increase albedo or to further increase GHE?

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.

He goes on to claim that «Pollution increases the albedo of thin clouds because but, contrary to the present theory, decreases it for thick clouds.

Increasing the negative feedback, as might happen in the atmosphere if global warming creates increased cloud cover (hence albedo), can increase the amplitude of the oscillations.

Nighttime increases in cloud cover will contribute to global warming — only daytime changes and the concurrent increase in albedo would give negative forcing.

«Our results suggest that, in contrast to other proposals to increase planetary albedo, offsetting mean global warming by reducing marine cloud droplet size does not necessarily lead to a drying, on average, of the continents.

Re 9 wili — I know of a paper suggesting, as I recall, that enhanced «backradiation» (downward radiation reaching the surface emitted by the air / clouds) contributed more to Arctic amplification specifically in the cold part of the year (just to be clear, backradiation should generally increase with any warming (aside from greenhouse feedbacks) and more so with a warming due to an increase in the greenhouse effect (including feedbacks like water vapor and, if positive, clouds, though regional changes in water vapor and clouds can go against the global trend); otherwise it was always my understanding that the albedo feedback was key (while sea ice decreases so far have been more a summer phenomenon (when it would be warmer to begin with), the heat capacity of the sea prevents much temperature response, but there is a greater build up of heat from the albedo feedback, and this is released in the cold part of the year when ice forms later or would have formed or would have been thicker; the seasonal effect of reduced winter snow cover decreasing at those latitudes which still recieve sunlight in the winter would not be so delayed).

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.

They talk of increased albedo and a reduction in temperatures to buy time with only 50 tonnes per second compared with a natural production of 40,000 tonnes per second, so the cloud / temperature connection is obviously very sensitive.

The mechanism which they claim to have identified is actually the opposite of what Lindzen described, where he claimed that clouds would increase as the result of the greenhouse effect and their albedo effect would hold down temperatures, but in the tropics the clouds that Spencer et al were dealing with presumably become fewer in number.

It's looking more and more like most climate change can be pegged to changes in solar output, either directly through additional warming or indirectly as decreases in solar output allow more cosmic rays to reach the atmosphere, causing increased cloud nucleation and therefore increasing the earth's albedo and reflecting more solar radiation.

Albedo from medium / low level clouds warms or cools the ocean surface by increasing or decreasing over time across the global surface.

They found that, although the aerosol direct effect or an increase in continental cloud albedo could contribute to damp the surface temperature diurnal cycle, only an increase in continental cloud cover would be consistent with observations (Karl et al., 1993).

Increased warming - > increased evaporation - > increased clouds - > increased albedo - > decreased solIncreased warming - > increased evaporation - > increased clouds - > increased albedo - > decreased solincreased evaporation - > increased clouds - > increased albedo - > decreased solincreased clouds - > increased albedo - > decreased solincreased albedo - > decreased solar input.

However, this warming eventually leads to additional cloud formation which leads to increased albedo - thus cooler temps.

And how can sea level albedo increase with cloud - cover increasing above them?

The albedo enhancement over the cloud - rain areas tends to increase the net (IR + albedo) radiation energy to space more than the weak suppression of (IR + albedo) in the clear areas.

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.

Its warming effect, however, is simultaneously amplified and dampened by positive and negative feedbacks such as increased water vapor (the most powerful greenhouse gas), reduced albedo, which is a measure of Earth's reflectivity, changes in cloud characteristics, and CO2 exchanges with the ocean and terrestrial ecosystems.

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.

If not either the CO2 / temp relationship is wrong [I do not think so] or the effect of the CO2 rise is being variably effected by negative feedbacks such as increased cloud formation and albedo thus offsetting the CO2 related temperature rise.

16) The main cloud bands move more equatorward to regions where insolation is more intense and total global albedo increases once more due to longer lines of air mass mixing.

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

Water vapour is not only a highly potent GHG but it increase has also recently been shown to have a serious potential for reducing cloud formation in the tropics and thus advancing Albedo Loss.

However, I am not a «warmista» by any means — we do not know how to properly quantify the albedo of aerosols, including clouds, with their consequent negative feedback effects in any of the climate sensitivity models as yet — and all models in the ensemble used by the «warmistas» are indicating the sensitivities (to atmospheric CO2 increase) are too high, by factors ranging from 2 to 4: which could indicate that climate sensitivity to a doubling of current CO2 concentrations will be of the order of 1 degree C or less outside the equatorial regions (none or very little in the equatorial regions)- i.e. an outcome which will likely be beneficial to all of us.

At this point, the GCMs increase clouds because clouds also produce a GHE, but the GCMs don't use the increased water vapor and clouds to increase cloud cover, thereby increasing cloud albedo, the mitigating reaction in nature.

More surface warming than cloud - height warming is indicative of surface albedo change and / or fewer clouds and / or increase in solar «constant».

With a less active Sun there has been an increase in cosmic radiation, causing more low clouds, leading to an increase in the Earth's albedo, and that is reflecting away of more solar radiation.

This increases absorbed IR by a factor of 5, offset in the hind0 - casting by exaggerated cloud albedo, hence evaporation and heating rate is artificially increased.

Conversely when the solar magnetic field is weak, there is no barrier to cosmic rays — they greatly increase large areas of low - level clouds, increasing the Earth's albedo and the planet cools.

Conversely, during periods of lesser sunspot activity (e.g., during much of the 19th Century, the late - 1950s to mid-1970s and the last 15 years) albedo would increase — a consequence of more cloud cover over the oceans and continents.

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.

1 Positive 1.1 Carbon cycle feedbacks 1.1.1 Arctic methane release 1.1.1.1 Methane release from melting permafrost peat bogs 1.1.1.2 Methane release from hydrates 1.1.2 Abrupt increases in atmospheric methane 1.1.3 Decomposition 1.1.4 Peat decomposition 1.1.5 Rainforest drying 1.1.6 Forest fires 1.1.7 Desertification 1.1.8 CO2 in the oceans 1.1.9 Modelling results 1.1.9.1 Implications for climate policy 1.2 Cloud feedback 1.3 Gas release 1.4 Ice - albedo feedback 1.5 Water vapor feedback 2 Negative 2.1 Carbon cycle 2.1.1 Le Chatelier's principle 2.1.2 Chemical weathering 2.1.3 Net Primary Productivity 2.2 Lapse rate 2.3 Blackbody radiation

Increased biomass can lead to increased emissions of biogases such as dimethyl sulfide and isoprene, which when oxidized in the atmospheric form sulphate and organic aerosols that can nucleate clouds, increasing cloud cover and planetary albedo — the CLAW HyIncreased biomass can lead to increased emissions of biogases such as dimethyl sulfide and isoprene, which when oxidized in the atmospheric form sulphate and organic aerosols that can nucleate clouds, increasing cloud cover and planetary albedo — the CLAW Hyincreased emissions of biogases such as dimethyl sulfide and isoprene, which when oxidized in the atmospheric form sulphate and organic aerosols that can nucleate clouds, increasing cloud cover and planetary albedo — the CLAW Hypothesis.

Eventually a thick enough layer of cloud would build up and increase the earth's albedo leading to a cessation of warming and perhaps a reversal to cooling again.

Add equivalent atmosphere and oceans to the Moon, and things would be downright toasty (a least until clouds and glaciation take hold and increase the Moon's albedo).

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.

Today because there is less energy coming from the sun through reduced incident solar energy and increased albedo from greater cloud formation the Earth is cooling and the OLR will change accordingly.

As the planet warms, increasing levels of water vapour in the atmosphere caused by higher evaporation levels form more clouds and snow increasing the albedo of the planet, reflecting heat back into space more efficiently, thus working to regulate the temperature downward.

We do not assume that albedo will increase on average to reject more heat, both through cloud SW rejection, and reduction of the distance water droplet LW needs to travel to escape to space.

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.

A slight change of ocean temperature (after a delay caused by the high specific heat of water, the annual mixing of thermocline waters with deeper waters in storms) ensures that rising CO2 reduces infrared absorbing H2O vapour while slightly increasing cloud cover (thus Earth's albedo), as evidenced by the fact that the NOAA data from 1948 - 2008 shows a fall in global humidity (not the positive feedback rise presumed by NASA's models!)