Sentences with phrase «increased cloud cover»

You said you do not believe GCM simulations are required to answer the question Does increased cloud cover result in warming or cooling?.

Palle et al (cited elsewhere here) have shown that the total albedo has decreased over the period 1985 - 2000, while cloud cover also decreased (resulting in global warming), and has reversed itself since then, with increased cloud cover.

The indirect aerosol effect may include increased cloud brightness, as aerosols lead to a larger number of smaller cloud droplets (the so - called Twomey effect), and increased cloud cover, as smaller droplets inhibit rainfall and increase cloud lifetime.

I have often wondered how the GCMs handle changes in albedo from increased cloud cover.

, plus the need for Dr Phil Jones to bravely «hide the decline» in the tree ring data (due to the fact tree ring growth is slowed by increased cloud cover / global dimming).

Basically, Dr Ferenc Miskolczi's life as a NASA climate research scientist was made hell because he discovered that the extra water vapour being evaporated is not having a positive - feedback (increasing the CO2 warming effect by absorbing more infrared from the sun), instead it is going into increased cloud cover, which reflects incoming sunlight back to space.

This confirms research by Henrik Svensmark, Australia's David Evans and others, who correlated low solar activity (fewer sunspots) and increased cloud cover (as modulated by cosmic rays), with a cooling climate.

The 1998/2001 climate shift was to a cooler state with increased cloud cover — and these prominent decadal modes last for 20 to 40 years.

However, there is a possibility that, starting from now, increased earth temperature might cause increased cloud cover which might reduce insolation and cause a reduction in temperature.

If in fact this results in increased cloud cover (for example), that results in less temperature increase than the stated, it is still not possible to rule out the stated value of «sensitivity»

In fact, «summer» is often a good time to travel if you are not used to the tropic, as the increased cloud cover limits sunburn.

It cools the atmosphere by absorbing some heat — heat flows from warmer to cooler — and by increased cloud cover that changes the energy budget of the planet.

[12] Some scientists believe increased water will have a negative feedback instead, due to increased cloud cover.

I'm wondering about Transantarctic mountains, altitude, humidity, dehumidification, increased cloud cover and the creation of more Antarctic ice through this process.

One can see that during La Nina events (in which case you mentally reverse the anomalies shown in the image), there is net convergence over the western Pacific which results in increased cloud cover and precipitation.

One thing we do know is that plankton blooms have been linked to increased cloud cover, which leads to cooling.

Increased evaporation will lead to increased cloud cover.

Increased cloud cover would result in more reflectivity, but would also result in a greater percentage of heat trapped in the atmosphere.

So it is reasonable to entertain the hypothesis that, starting with the temperature distribution as it is now, future CO2 increases, if they produce temperature increases of any size, will produce increased cloud cover.

Matthew says: So it is reasonable to entertain the hypothesis that, starting with the temperature distribution as it is now, future CO2 increases, if they produce temperature increases of any size, will produce increased cloud cover.

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.

Increased cloud cover is a possible mechanism for such a negative feedback at the high temperatures.

My father is somewhat of a climate «sceptic» and insists that the prediction of 0.3 C cooling is based only on solar irradiance and does not take into account increased cloud cover caused by low sun activity (he beleives that we are going to be facing extreme global cooling over the next few decades).

So the mechanism should cause a decline in skin temperature gradients with increased cloud cover (more downward heat radiation), and there should also be a decline in the difference between cool skin layer and ocean bulk temperatures - as less heat escapes the ocean under increased atmospheric warming.

But since the mid-1990s, increasing cloud cover has deprived the islands of about four hours of sunshine per month in the summer.

Crewless ships wander the oceans spewing saltwater into the air to increase cloud cover.

What I wrote was that the historical record does not rule out the possibility that at current temperatures and cloud covers, a future increase in CO2 or surface temperature may increase cloud cover.

and possibly increase the cloud cover, especially during the hottest time of the year in each region.

All I have proposed is the possibility that a small (1C or less) increase in global mean temp or a doubling of CO2 concentration will raise the rate of latent heat transport and possibly increase the cloud cover, especially during the hottest time of the year in each region.

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.

Time argues global warming is increasing cloud cover, which limits the frogs exposure to sunlight — a natural disinfectant that «can rid the frogs of this fungus.»

Rising ocean temperature increases cloud cover until such time as clouds starve the ocean of solar energy until an equilibrium is reached.

An increase in surface temp will increase water vapor pressure at the surface: that will likely increase the rate of evaporation at the surface, which may or may not increase cloud cover.

(This may well explain the upward slope obtained in the graph, with increasing cloud cover).

Could a 12 % increase in the CAPE * PrecipitationRate be produced by a 1C increase of surface temp without increasing cloud cover?

Likely decadal - scale increasing cloud cover too, but obviously we have no cloud data prior to the 1980s.

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.

The idea that low solar states will increase cloud cover is irrational as that amounts to a large positive feedback.

A cool Pacific in La Niña decrease infrared emissions from a cool atmosphere and increase cloud cover resulting in more sunlight being reflected back to space.

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 Hypothesis.

Increasing cloud cover causes rising temperatures, which in turn causes more evaporation and therefore more clouds and higher temperatures and so on, and so on.

If the theory was correct, it is difficult to see how the process would stop — after all, increasing cloud cover reduces the Earth's ability to radiate energy off into space.

So going back to the simplistic theory about increasing cloud cover being a major positive feedback.

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!)

No greenhouse has oceans that evaporate slightly faster when CO2 levels rise, increasing cloud cover slightly and cancelling out temperature effects.

Water vapour however and increasing cloud cover also increase global temperatures.

Be that as it may, the models do not increase cloud cover when they increase humidity, so miss this powerful negative feedback that mitigates warming.

For example he discusses the recent CERN paper by Kirkby (he even misspells the name as Kirby as all the deniers do) and claims that the paper «is providing scientific evidence that low solar activity causes more cosmic rays which indirectly increases cloud cover and reduces solar penetration, followed by cooling».

Such pollution increases cloud cover to cool the Earth's surface, reduces evaporation and, in turn, slows the momentum of air current bands that drive the global climate.

Not exact matches

Computer modeling and satellite observations suggest that these tiny particles can increase storm - cloud cover over certain regions of the North Pacific by 20 to 50 percent, enough to alter storm tracks in some cases.