reducion in long wave
radiation leaving the atmosphere 3.
Not exact matches
When lingering near the top of the
atmosphere, the O3 molecule provides cover from energetic
radiation but closer to the ground it can choke lungs and blight
leaves.
Thanks to the dry, clear
atmosphere at the South Pole, SPT is better able to «look» at the cosmic microwave background — the thermal
radiation left over from the Big Bang — and map out the location of galaxy clusters, which are hundreds to thousands of galaxies that are bound together gravitationally and among the largest objects in the universe.
There are contributions from interstellar matter, from the three - degree - Kelvin background
radiation left over from the early history of the universe, from noise that is fundamentally associated with the operation of any detector and from the absorption of
radiation by the earth's
atmosphere.
More greenhouse gas (whether it is carbon dioxide or water vapor) will reduce the ability of thermal
radiation to
leave the
atmosphere, but it will not instantaneously raise the temperature.
As long as there is more carbon dioxide in the
atmosphere than before, it will reduce the percentage of thermal
radiation which is able to
leave the
atmosphere, which means that the climate system must heat up if the rate at which energy
leaves the climate system is to equal the rate an which energy enters the climate system.
With the current GHG content in the
atmosphere, more solar energy arrives than
leaves via
radiation -LRB-.85 + / -.15 Watt / m ^ 2), which raises the heat content of the terrestrial system, i.e., the average temperature over the whole earth + oceans +
atmosphere.
What happens at the «top of
atmosphere» — the level where outgoing
radiation leaves for space, not itself a very easy concept — is the restoration of equilibrium, the increase in temperature that, through Helmholtz - Boltzmann at the Earth's brightness temperature 255K, restores the balance between incoming and outgoing energies.
It is the reduced amount of
radiation leaving the top of the
atmosphere that changes the earth's balance of heat, and therefore defines the «direct radiative forcing» caused by doubling CO2.
Because CO2 makes the
atmosphere more opaque to infrared
radiation, and because the
atmosphere gets colder as you get higher, the «effective
radiation temperature» of the infrared
radiation leaving the earth is made colder by increasing CO2 (fewer Watts per square meter of infrared
radiation leave the top of the
atmosphere).
It seems to me that a period where solar energy was entering and then quickly circulated into the depths would
leave less IR
radiation entering the
atmosphere.
The
radiation leaving the top of the
atmosphere would be the same, but it would start its move toward equilibrium with the sun, which is now zero.
That means less
radiation leaving the earth for outer space, So more energy stays in the earth
atmosphere system making the surface warmer.
The term «photosphere» for a star has essentially the same meaning as any of the six terms «Effective -LCB- Emission
Radiation Radiating -RCB--LCB- Height Level -RCB-» for the
atmosphere of a planet, being the altitude at which the gas above has an optical depth of 2/3, i.e. at which about 50 % of the
radiation leaving that altitude vertically upwards escapes to space.
The NCAR scientists now state these satellites still see there is more energy
radiation entering the upper
atmosphere than
leaving it, in whatever part of the spectrum.
The spacecraft's Atmospheric Infrared Sounder, an instrument that measures infrared heat
radiation as it
leaves the
atmosphere, is expected to provide vastly more and better temperature and humidity readings worldwide than are available now from weather satellites and other sources.
With regard to the diabatic process the exchange of
radiation in and out reaches thermal equilibrium relatively quickly (
leaving Earth's oceans out of the scenario for current purposes) and once the temperature rise within the
atmosphere has occurred then equilibrium has been achieved and energy in at TOA will match energy out.
Research published in 2008 by Arizona State University professor Peter Crozier suggests that this nanoscale atmospheric aerosol species is abundant in the
atmosphere over East Asian countries and should be explicitly included in models of radiative forcing (the gap between energy
radiation reaching the Earth and that
leaving through the upper
atmosphere).
(There is little water vapor in the upper
atmosphere and most energy
leaves the lower
atmosphere by convection to or
radiation to the upper
atmosphere.)
The 30 % is used on the
left hand side of this exceedingly simple equation to determine the net
radiations hitting the
atmosphere and surface taking into account earth albedo.
He forgot to mention conduction, but if he truly meant to
leave it out then his conclusion is already obviously false as he
left out a physical process that is infinitely faster than thermal relaxation due to
radiation in a GHG - free
atmosphere, where there is none.
In the real world (our
atmosphere) the ground heats the air above continuousy during daylight hours and there are many other processes such as convection,
radiation and evaporation that lead to energy
leaving the system, so the process is never at rest and the temperature gradiant is maintained.
We have observed an increased greenhouse effect with more
radiation reaching the surface and less
leaving the
atmosphere.
When Eli last
left the bunnies, he was pointing out how gravity explains much of the greenhouse effect, well, except for the part that you need some things in the
atmosphere that absorb IR
radiation from the surface.
In a real planetary greenhouse, you have a «one - way» hole in the form of an
atmosphere that allows solar
radiation in and blocks longwave
radiation from
leaving.
«All the energy that enters or
leaves the Earth system does so via
radiation at the top of the
atmosphere.
I didn't mention the obvious fact that you stated, that the heating will cease, when the upper
atmosphere warms enough to restore the equilibrium between
radiation leaving the earth and arriving from the sun.
Figure 3:
Left: composite global linear trends for hiatus decades (red bars) and all other decades (green bars) for top of the
atmosphere (TOA) net
radiation (positive values denote net energy entering the system).
The graph on the
left shows the actual observed Solar
radiation spectrum (in red) as measured at the top of the
Atmosphere.
If radiative escape is blocked then that only
leaves convection and conduction to get the deeper water to the surface where it can escape through
radiation, conduction to the
atmosphere, and evaporation.
Left: Actual Solar
radiation spectrum observed at top of
Atmosphere, compared to black body model.
And the only purely observational study featured in AR4, Forster & Gregory (2006), which used satellite observations of
radiation entering and
leaving the
atmosphere, also gave a best estimate of 1.6 °C, with a 95 % upper bound of 4.1 °C.
Matthew, to clarify what I said - All heat that
leaves the earth from the surface or the
atmosphere is by
radiation.
Thermal
radiation comes into the
atmosphere from the sun, is converted to different wavelengths, and
leaves it again.
It would
leave the outer
atmosphere by
radiation.
That energy
leaves the
atmosphere by
radiation from IR active molecules.