Without the infrared atmospheric window, the Earth would become much too warm to support life, and possibly so warm that it would lose its water, as Venus did early in solar system history.
22.
These kinetic principles for window and non-window radiation arise in the light of the definition of the atmospheric window as a dynamic property of the whole atmosphere, logically distinct from the electromagnetic spectral window.
23.
The observations in the various infrared atmospheric windows indicate that the anticyclonic circulation observed near the poles may penetrate as deep as to 50 km altitude, i . e . to the base of the clouds.
24.
In the case of CFCs, the strongest of these bands are located in the spectral region 7.8 15.3 �m referred to as an atmospheric window due to the relative transparency of the atmosphere within this region.
25.
The importance of the infrared atmospheric window in the atmospheric energy balance was discovered by George Simpson in 1928, based on G . Hettner's 1918 laboratory studies of the gap in the absorption spectrum of water vapor.
26.
Over the Atlas Mountains, interferometrically recorded spectra of outgoing longwave radiation show emission that has arisen from the land surface at a temperature of about 320 K and passed through the atmospheric window, and non-window emission that has arisen mainly from the troposphere at temperatures about 260 K.
27.
The "'infrared atmospheric window "'is the overall dynamic property of the earth's atmosphere, taken as a whole at each place and occasion of interest, that lets some infrared radiation from the cloud tops and land-sea surface pass directly to space without intermediate absorption and re-emission, and thus without heating the atmosphere.
28.
But while you're hunting for an Aussie to embrace, don't forget to gaze heavenward from time to time, because Massachusetts Gov . William Weld has proclaimed this Sky Awareness and Appreciation Week in Massachusetts, and the governor wants us all to pay tribute to our " atmospheric window to the universe ."
29.
Aside from having its " J " = 1?! 0 transition in a clear portion of the atmospheric window, as well as having numerous isotopomers also available for easy study, and in addition to having a large dipole moment that makes observations particularly simple, HNC is, in its molecular nature, a quite simple molecule.
30.
In those days, computers were not available, and Simpson notes that he used approximations; he writes : " There is no hope of getting an exact solution; but by making suitable simplifying assumptions . . . . " Nowadays, accurate line-by-line computations are possible, and careful studies of the infrared atmospheric window have been published.
