Sentences with phrase «increase water vapor concentrations»

Indirectly, human activity that increases global temperatures will increase water vapor concentrations, a process known as water vapor feedback.

Current state - of - the - art climate models predict that increasing water vapor concentrations in warmer air will amplify the greenhouse effect created by anthropogenic greenhouse gases while maintaining nearly constant relative humidity.

Not exact matches

... The Earth's atmospheric methane concentration has increased by about 150 % since 1750, and it accounts for 20 % of the total radiative forcing from all of the long - lived and globally mixed greenhouse gases (these gases don't include water vapor which is by far the largest component of the greenhouse effect).

[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?)

1) Even though CO2 concentrations in the atmosphere has gone up by 30 % over the last 200 years or so (compared to being stable for 400 000), I have a hard time to comprehend how an increase from 0.028 % to 0.038 % of CO2 by volume can have any effect on the thermal mass of the atmosphere considering that water vapor by volume is 50x greater and has higher thermal coefficients.

So as more CO2 gets pumped into the atmosphere the temperature rises, which causes more water to evaporate (as you accurately state), increasing the concentration of water vapor in the atmosphere — which heats the atmosphere even more, causing even more water vapor to enter the atmosphere.

increase in the concentration of water vapor in the atmosphere as the atmosphere warms as indicated by the Clausius - Clapeyron equation.

Their results were not global and the did not show a total increase in ghg concentration b / c the omitted water vapor, the strongest and most abundant ghg!

Specifically, as global temperatures have steadily increased at their fastest rates in millions of years, it's directly affected things like water vapor concentrations, clouds, precipitation patterns, and stream flow patterns, which are all related to the water cycle.

Therefore, near the poles, water vapor is near zero, almost all of the GHG concentrations are from the non - condensing / man - caused - increasing CO2 and methane.

The collapse of the Sc clouds occurs because, as the free - tropospheric longwave opacity increases with increased CO2 and water vapor concentrations, the turbulent mixing that is driven by cloud - top radiative cooling weakens, and therefore is unable to maintain the Sc layer.

The water vapor, lapse - rate and ice - albedo feedbacks in isolation enhance the global warming that would result from increasing CO2 concentrations alone to around +2.2 °C.

Changing concentrations of CO2 will impact the temperature and if it is an increase the positive feedback of drawing out more water vapor will contribute to the average climate getting warmer.

If, for instance, CO2 concentrations are doubled, then the absorption would increase by 4 W / m2, but once the water vapor and clouds react, the absorption increases by almost 20 W / m2 — demonstrating that (in the GISS climate model, at least) the «feedbacks» are amplifying the effects of the initial radiative forcing from CO2 alone.

For instance, as temperature rises, the maximum sustainable water vapor concentration increases by about 7 % per degree Celsius.

An observed consequence of higher water vapor concentrations is the increased frequency of intense precipitation events, mainly over land areas.

It only becomes significant in the models by assuming that water vapor concentration increases in response to the slight warming produced by CO2 increases and therefore constitutes a powerful positive feedback effect which triples the effect of CO2 by itself.

The effect of a unit of water vapor is logarithmic and diminishes as total concentration increases.

Water vapor then reacts to this increased absorption, its concentration in air diminishes, its share of IR absorption goes down, and atmospheric transmittance is restored to its nominal 15 percent again.

3 Further complicating the response of the different atmospheric levels to increases in greenhouse gases are other processes such as those associated with changes in the concentration and distribution of atmospheric water vapor and clouds.

If we were to increase the level of water vapor in the atmosphere and leave everything else unchanged, the water vapor would fairly quickly condense out as rain, snow, frost or dew and there would be no lasting effect on global temperatures Carbon dioxide comes second after water vapor and its concentration in the atmosphere is heavily affected by burning of fossil fuels.

This heat - trapping, warming influence of the blanket of air over the Earth's surface is called the greenhouse effect, and it will become even stronger as greenhouse gases such as carbon dioxide, methane and water vapor increase in concentration.

For more than 10 years (I forgot how much more), upper tropospheric water vapor has not increased in response to significant increases in CO2 atmospheric concentrations.

Cloud condensation nuclei: Aerosol particles that provide a platform for the condensation of water vapor, resulting in clouds with higher droplet concentrations and increased albedo.

Consequently, as air warms, for whatever reason, more evaporation may take place and the concentration of water vapor may increase.

«The resulting uniform increase of longwave downward radiation manifests radiative forcing that is induced by greenhouse gas concentrations and water vapor feedback, and proves the «theory» of greenhouse warming with direct observations.»

Note that this is only part of the story since, as far as we are aware, no one has yet investigated a counterintuitive parallel effect — condensation and precipitation will likely reduce the total lower atmospheric concentration of that ubiquitous greenhouse gas, water vapor, so increasing clear sky radiative cooling.

... And with a general increase in SSTs, I expect certain kinds of low - frequency variability, in particular those in which SST anomalies produce a perturbation wave train in the westerlies allowing for global teleconnections, to be more sensitive to the same SST anomalies, because of the exponential temperature dependence of water vapor concentration (involved in latent heating, enhances deep convection, etc.).

Should the Hadley cell, monsoons, and Walker circulation be expected to increase in strength due to greater water vapor concentrations (except where aerosol emissions throw a wrench into it)?

Because CO2's ability to absorb IR increases linearly at low concentrations (under 100ppm) a minimal amount even absent most water vapor serves to keep the earth just warm enough to prevent a snowball earth episode most of the time.

Where water vapor is important is as a feedback effect... whereby the warming of the atmosphere due to increased CO2 causes the «equilibrium» concentration of water vapor to increase and this then enhances the warming because of water vapor's absorption of infrared radiation.

But perhaps most importantly, the fact that the concentration of water vapor does increase and decrease along with external temperature changes was proven as a result of the 1991 eruption of Mount Pinatubo.

Secondly, though the models assume that the concentration of water vapor will increase in the tropical mid-troposphere as the space occupied by the atmosphere warms, advection transports much of the additional water vapor poleward from the tropics at that altitude.

Is there a way to calculate the forcing where increasing concentrations of CO2 causing a feedback of increasing H2O evaporation yield an amplified forcing from the combination of CO2 and water vapor?

While it was true that the atmospheric concentration of carbon dioxide had been increasing, he said, and had passed 400 parts per million, the dominant effect of water vapor had helped flatten the greenhouse effect, such that the rise of global surface temperatures had slowed significantly.