Not exact matches
In the new observations, certain
wavelengths seem to be
absorbed by fast - moving gas
clouds, presumably debris from a doomed star: relatively cool gas laden with ionized carbon and silicon, flowing away from the black hole with a velocity of some 6000 kilometers per second.
Cloud droplets
absorb certain
wavelengths of light depending on their size, so noting which
wavelengths are missing in readings reveals the size of the droplets present.
These longer -
wavelength observations helped to measure the properties of
clouds in the planet's atmosphere that
absorb and re-radiate infrared emission.»
Earlier I pointed out that it could / should be better to specifically block solar IR, or in particular those
wavelengths absorbed by H2O vapor, other gases and
clouds, in the troposphere, rather than block all solar
wavelengths indiscriminately (because selective shading could reduce the effect on convection and precipitation — caveats about
cloud and H2O distribution... etc.).
Indeed, some
wavelengths of IR can be
absorbed by both water vapor or
clouds, or water vapor and CO2.
IR is
absorbed totally at some
wavelengths but it penetrates even trough the
clouds at other
wavelengths.
The longer
wavelength (infrared) radiation created there is reflected upwards, and then is
absorbed by
clouds and the greenhouse gases (GHGs include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), etc.).
Greenhouse Gas (GHG)- Geenhouse gases are those gaseous constituents of the atmosphere, both natural and anthropogenic, that
absorb and emit radiation at specific
wavelengths within the spectrum of thermal infrared radiation emitted by the Earth's surface, the atmosphere itself, and by
clouds.
Because of the different intramolecular forces between water molecules as vapor in air, water, and ice, the
wavelengths of emission and absorption are shifted; some of the radiation from the water / ice droplets at the top of a
cloud can escape to space because the atmosphere above it is transparent at its
wavelengths, whereas the same radiation from droplets at the bottom of a
cloud will be
absorbed and re-emitted in random directions from the droplets above, including back down to the originating droplets.
Presumbly that's converted into radiation by
clouds, dust particles, etc which are radiating in roughly the same
wavelength's as they
absorb radiation from earth's surface.