Sentences with phrase «gas absorbs radiation»

But it is fundamental to understanding how a «greenhouse» gas absorbs radiation, and fundamental to understanding why some of us think the whole global warming scare is a total scam.

The trace gases absorb the radiation of the surface and radiate at the temperature of the air which is, at some height, most of the time slightly lower that of the surface.

Anthropogenic greenhouse gases absorb the radiation from Earth's surface back into space and send part of it back to Earth.

Not exact matches

This involves determining the composition of a planetary atmosphere by measuring its spectra, the distinctive radiation that gases absorb at their own particular wavelengths.

Ultraviolet light from early, blueish stars (illustrated) interacted with hydrogen gas, causing it to absorb background radiation, and creating a signature scientists have now detected.

Solar radiation management attempts to offset effects of greenhouse gases by causing Earth to absorb less solar radiation.

Geoengineering schemes use two ways to offset this process: They either remove the gases from the atmosphere, allowing more radiation to exit, or deflect a portion of the sun's light — about 1.8 percent should do the trick — reducing the amount of radiation absorbed by the earth.

For most people, the risk of absorbing excess ionizing radiation comes mainly through breathing radon, a gas released by uranium and thorium in soils.

At some of these overlaps, the atmosphere already absorbs 100 % of radiation, meaning that adding more greenhouse gases can not increase absorption at these specific frequencies.

A: Global warming occurs when carbon dioxide (CO2) and other air pollutants and greenhouse gases collect in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth's surface.

Another possible explanation for the strong radio signal Bowman and the EDGES team discovered is that there's more radio background radiation being absorbed, rather than the hydrogen gas being colder than previously thought.

It's not totally about how much infrared from the surface that is blocked (currently about 90 % of surface emissions is absorbed by greenhouse gases), its also about the height within the atmosphere from which radiation escapes.

Carbon dioxide, as well as CH4 and other gases, absorb and re-emit longwave radiation back to the earth's surface that would otherwise radiate rapidly into outer space, thus warming the Earth.

I suspect the problem here is that you are thinking of greenhouse gases as blocking thermal radiation such that once the radiation is absorbed there isn't any reemission.

That the nebula is so much brighter than the star shows that the star emits primarily highly energetic radiation of the non-visible part of the electro - magnetic spectrum, which is absorbed by exciting the nebula's gas, and re-emitted by the nebula, at last to a good part in the visible light.

Whether being lesser than CO2 in number of molecules in the atmosphere, methane is a potent greenhouse gas absorbing more infra - red radiation per molecule than CO2.

If the temperature decreased with altitude, infrared radiation would at some point pass through a region of cooler water - gas, which would absorb the part of the spectrum responsible for the glowing effect, he explained.

In doing so, as the CMB photons traveled through this hydrogen gas, it absorbed a particular frequency — so rather than look for a specific emission, astronomers have been looking for a specific type of absorption, or a certain frequency of CMB radiation that was missing.

However, when a coma develops, dust reflects still more sunlight, and gas in the coma absorbs ultraviolet radiation and begins to fluoresce.

Any short wavelength radiation that might have been emitted was quickly absorbed by the atomic gas, and a long interval known as the Dark Ages began.

Gases which absorb radiation will radiate in all directions.

In 1861, John Tyndal published laboratory results identifying carbon dioxide as a greenhouse gas that absorbed heat rays (longwave radiation).

Much of this radiation is returned to the space and the other part is absorbed by the layer of gas surrounding atmosphere causing the greenhouse effect.

The greenhouse gases absorb some infrared radiation emitted by the surface of the Earth and in turn radiate the absorbed energy back to the surface.

ABM: The whole point about the greenhouse gases in a planetary atmosphere is that they absorb the infrared radiation emitted by the surface, and so Kirchhoff's law does not apply.

If the temperature below is warmer than the local temperature, IR radiation that is re-radiated is less than is absorbed, the net effect of the greenhouse gases is to warm that layer.

So I agree with William, the cooling effect at the top of the atmosphere requires that the atmosphere be absorbing some incoming radiation (and that this absorption be (mostly) by non-greenhouse gasses).

Question 3: Third sentence: «Greenhouse gases re-radiate the absorbed energy in all directions, and thus part of this radiation goes back to the surface leads to warming.»

Greenhouse gases (like CO2, CH4 or water) absorb and re-radiate infra - red (IR) radiation that is emitted from the planet's surface at rates that depend on the temperature (the Stefan - Boltzmann law).

If we are talking about clear atmosphere, then no, because the radiation will be ONLY at exactly those frequencies where the greenhouse gases above and below absorb / emit.

Barton, For the atmosphere to be in thermodynamic equilibrium, the greenhouse gases must be emitting as much radiation as they absorb.

This knowledge is not new; the same year as Charles Darwin published «The Origin of Species», John Tyndall, an Irish scientist, published a paper in 1859 describing how he measured the absorption of infrared radiation in his laboratory, finding that CO2 and water vapour absorbed the radiation, whereas nitrogen and oxygen, the main gases in the atmosphere, do not.

The point is that although selection rules will determine whether a molecular vibration can absorb IR radiation, and is obviously necessary for a complete discussion of the issue, the issue can be simply addressed by consideration of the frequencies of absorption by the gas and emission by the planet.

Words only have meaning in context and while it may be true that water vapor is a greenhouse gas in the sense that more of it in the atmosphere will absorb more infrared radiation and warm the climate, it is not a greenhouse gas in the sense that it is a gas we need to seriously worry about adding directly to the atmosphere.

The elevation of the atmospheric temperature is due to a shift in the radiative equilibrium, i.e. more back radiation absorbed by added gases, selective to IR radiation.

CO2 (and some other gases) in the atmosphere are however more opaque to LWIR; they absorb that a chunk of that outgoing radiation and re-radiate it in all directions — so that a fraction less than half is re-radiated downwards; which has the effect of slowing the transfer of heat (by radiation) out of the atmosphere.

ie does a slightly lower density of air mean a slightly lower ground level temperature (temperature normally decreases with height at the lower air density), so that in reality adding CO2 and subtracting more O2 actually causes miniscule or trivial global COOLING, and the (unused) ability of the changed atmosphere to absorb radiation energy and transmit it to the rest of the air is overruled or limited by the ideal gas law?

Diatomic molecules like O2 and N2 are transparent to that radiation and will never fit the definition of a greenhouse gas, no matter that they absorb heat via other means.

1) Greenhouse gasses absorb infrared radiation in the atmosphere and re-emit much of it back toward the surface, thus warming the planet (less heat escapes; Fourier, 1824).

In reply to # 1, greenhouse gases absorb selective bands of radiation in the atmosphere and re-radiate them in all directions as longer wave infrared.

Greenhouse gases absorb thermal radiation from the surface and slow radiative loss to space.

I explained to you on your own website that, whether you call them greenhouse gases or not, CO2, CH4, N20 behave differently from N2 and O2: GHGs absorb outgoing long wave radiation and N2 and O2 don't.

In the case of an increase in greenhouse gases (which cause a warming), that implies that the planet will be absorbing more solar radiation than it emits as longwave radiation.

As far as climatic impact is concerned, however, the fraction of the total mass of the atmosphere is irrelevant since the atmosphere consists of 99.9 % nitrogen, oxygen and argon, i.e. gases which can not absorb infrared radiation.

Only molecules made of at least three atoms absorb heat radiation and thus only such trace gases makes the greenhouse effect, and among these CO2 is the second most important after water vapor.

The reason is that the Earth has an atmosphere that contains gases that absorb thermal radiation.

We also know quite accurately the spectral absorption characteristics for the absorbing gases, and how cloud and aerosol particles interact with thermal radiation.

CO2 is largely transparent to visual radiation but absorbs greatly in the infrared, i.e., it is a greenhouse gas.

1) Scientists have long known that greenhouse gases in the atmosphere — such as carbon dioxide, methane, or water vapor — absorb certain frequencies of infrared radiation and scatter them back toward the Earth.

Maybe we can do an informal poll here - Do you agree that CO2 is a greenhouse gas (i.e., absorbs and re-emits long wave radiation)?»