Sentences with phrase «width of the absorption»

The width of the absorption lines depends on the spread of the distribution of the velocities — the velocity disperion.

For elliptical galaxies the width of the absorption lines from all of the stars blended together is used to measure the mass of elliptical galaxies.

The width of the absorption lines from the stars or the radio emission lines from the gas in a galaxy depend on the amount of stellar motion in the galaxy.

Doppler, collisional and pressure broadening increases the width of these absorption lines, so there is a finite (albeit at some wavelengths very small) absorptivity across the whole spectrum.

Second, robotic probes have measured Venus» atmosphere to be about 97 % CO2, and we can see from the image above (click for a larger version) that the absorption spectrum for CO2 (at Earth temperature and pressure — Venusian temperature and pressure increases the width of the absorption bands, making CO2 a stronger absorber in Venus» atmosphere than in Earth's) strongly overlaps the peak emission spectrum of Venus» surface.

Not exact matches

Increasing the GHG content increases the depth or width of this bite, with the depth constrained by the coldest altitude of the body in consideration (where the «emission height» eventually propagates to) and the width increases as the wings of the absorption features become important.

The ability of a band to shape the temperature profile of the whole atmosphere should tend to be maximum at intermediate optical thicknesses (for a given band width), because at small optical thicknesses, the amounts of emission and absorption within any layer will be small relative to what happens in other bands, while at large optical thicknesses, the net fluxes will tend to go to zero (except near TOA and, absent convection, the surface) and will be insensitive to changes in the temperature profile (except near TOA), thus allowing other bands greater control over the temperature profile (depending on wavelength — greater influence for bands with larger bandwidths at wavelengths closer to the peak wavelength — which will depend on temperature and thus vary with height.

As a result, it would be more accurate to represent about half of the CO2 absorption (bar width) as being absorbed by water vapor.

Yes at the line center the absorption of CO2 is «saturated: — surface emission totally replaced by emission from the top of the ghg column but as the conc of the ghg increases, the line width increases so the ghg starts to absorb over a greater and greater range of wavelengths — this is the cause of the logarithmic relationship between concentration and absorption.

The simpler approach to calculating the downward radiation from a given gas by the total concentration across say 10 km of atmosphere is going to give a very approximate answer — this is because the absorption lines change their width with pressure and temperature.