The intensity of the Sun's radiation increases, of course, the closer the planet is, by a factor of the distance squared, which means Venus gets 1.38 - squared (or 1.91) MORE solar
radiation than Earth.
This condition exists in spite of the fact that the high reflectivity of the Venusian clouds causes the planet to absorb less solar
radiation than Earth.
Because Proxima b is so much closer to its star than Earth is to the sun, the flare would have blasted Proxima b with 4,000 times more
radiation than Earth typically gets from the sun's flares.
Not exact matches
Mars colonists will get blasted with
radiation levels eight times higher
than government limits on
Earth.
High - energy
radiation from a gamma - ray burst reached
Earth 4 minutes later
than the lower - energy rays.
At sea level on
Earth, sunlight's «
radiation pressure» is about 50 million times smaller
than atmospheric pressure.
The feeble glow of microwaves from the sun is absorbed by our air on the way down, anyway, so unless the core somehow also strips off
Earth's atmosphere — in which case we have bigger problems
than solar
radiation — we should be safe enough from microwaves if our planet's center stops spinning.
Although Proxima Centauri's dimness provides the planet with a balmy climate, the star is prone to outbursts of harsh X-ray and ultraviolet
radiation, which could damage any chance of life on the planet — X-rays hit the surface 400 times more often
than those from the sun pummel
Earth.
But TRAPPIST - 1 emits enough
radiation for its inner planets to have lost 20 times more water in the last eight billion years
than all the
Earth's oceans combined, they found.
Pioneer 10 also survived and charted the intense
radiation belts in the Jovian system, which are 10,000 times stronger
than anything measured on
Earth.
It sent a flood of high - energy
radiation towards
Earth that lasted much longer
than is typical for a gamma - ray burst (GRB).
Surprisingly, this dust gives off the brightest infrared
radiation in the solar system (except for the sun's), some 300 times brighter
than Earth's.
The star has emitted a flare that made it 68 times brighter
than usual, and could expose any life on its orbiting
Earth - sized planet to fatal levels of ultraviolet
radiation.
Astronomers have seen the star emit a superflare that briefly made it 68 times brighter
than usual, and could expose any life on the surface of its orbiting
Earth - sized planet to fatal levels of UV
radiation.
A molecule of water is two hundred times more effective at trapping
radiation from
Earth than a molecule of carbon dioxide.
The gauntlet Juno ran at Jupiter held many chances for catastrophe: The spacecraft might have been knocked out by intense magnetic fields (at that distance, 20 times stronger
than Earth's), ionizing
radiation (a total dose of 265 rads — more
than enough to kill a human being), dust particles from Jupiter's rings (from which the main engine was completely unshielded) or loss of power if the solar arrays were unable to reorient to the sun.
The Great Barrier Reef lies directly below the largest hole in the ozone layer, which means the region receives significantly more UV
radiation than other place on
Earth.
According to standard physics, cosmic rays created outside our galaxy with energies greater
than about 1020 electronvolts (eV) should not reach
Earth at those energies: as they travel over such vast regions of space they should lose energy because of collisions with photons of the cosmic microwave background (CMB), the
radiation left over from the big bang.
But
radiation from the sun and cosmic rays is 100 times stronger in space
than on
Earth, which is protected by a layer of ozone and the Van Allen
radiation belts.
Thus when the
Earth is radiating with a greater intensity
than the back
radiation from the air, then the excess
radiation will be absorbed by the air molecules, and the air will warm.
To understand
Earth's changing
radiation environment: Regular monitoring of the stratosphere over California shows that cosmic rays have intensified more
than 10 % since 2015.
Blazars appear to produce more gamma
radiation than other types of active galaxies, but this may be because one of their jets is pointed toward
Earth.
Okay, one little nit - picky issue with Q2 is that O2 and N2 actually DO absorb infrared
radiation, just at shorter wavelengths
than matter for the
Earth's infrared emission spectrum (3 - 27 microns, with a peak around 9 microns or so).
Surface radiative energy budget plays an important role in the Arctic, which is covered by snow and ice: when the balance is positive, more solar
radiation from the Sun and the
Earth's atmosphere arrives on the
Earth's surface
than is emitted from it.
It's a little denser
than Earth, suggesting an iron core, and it's about the same size and receives a similar amount of
radiation from its parent star as we do from the Sun.
Researchers say that if there were no VLF bubble, the
radiation belt boundary would be far closer to
Earth than it is.
However, the telescope will explore a much larger region of the sky
than Kepler, with an emphasis on detecting rocky planets on
Earth - like orbits that receive a similar amount of
radiation as our own planet (the so - called habitable zone).
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.
Thus when the
Earth is radiating with a greater intensity
than the back
radiation from the air, then the excess
radiation will be absorbed by the air molecules, and the air will warm.
The whole issue is that any level above what is often called the «effective radiating level» (say, at ~ 255 K on
Earth) should start to cool as atmospheric CO2 increases, since the layers above this height are being shielded more strongly from upwelling
radiation... except not quite, because convection distributes heating higher
than this level, the stratosphere marks the point where convection gives out and there is high static stability.
Because the wavelength of emitted EM
radiation varies with the temperature of the source, it does so in the form of longer - wave IR
than that received from the Sun — the
Earth's surface is significantly cooler
than that of the Sun.
Okay, one little nit - picky issue with Q2 is that O2 and N2 actually DO absorb infrared
radiation, just at shorter wavelengths
than matter for the
Earth's infrared emission spectrum (3 - 27 microns, with a peak around 9 microns or so).
1) Although it receives slightly less
radiation from its host star
than the
Earth, that is not really an issue.
More to the point though, CO2 (or H2O or whatever) absorption of IR
radiation does not depend on the
earth's blackbody or brightness temperature being higher
than the mean temperature of the atmosphere (and the CO2).
Can CO2 at ~ 1 km, ~ 6C colder
than the surface and the
earth's brightness temperature, not absorb any of the
earth's IR
radiation?
Likewise, CO2 at a mean temperature less
than the
earth's brightness temperature still absorbs
radiation.
The net result is,
earth receives a lot less infrared
radiation from the sun
than it radiates away.
Actually, though, most of the OLR originates from below the tropopause (can get up around 18 km in the tropics, generally lower)-- with a majority of solar
radiation absorbed at the surface, a crude approximation can be made that the area emitting to space is less
than 2 * (20/6371) * 100 % ~ = 0.628 % more
than the area heated by the sun, so the OLR per unit area should be well within about 0.6 % of the value calculated without the
Earth's curvature (I'm guessing it would actually be closer to if not less
than 0.3 % different).
``... peer reviewed science empriically shows that during the late 20th century warming there was an increase of 2.7 W / m ² to 6.8 W / m ² more solar
radiation reaching the
earth's surface, which was ~ 10 times greater
than the increase in CO2 forcing..»
Just face reality and admit that peer reviewed science empriically shows that during the late 20th century warming there was an increase of 2.7 W / m ² to 6.8 W / m ² more solar
radiation reaching the
earth's surface, which was ~ 10 times greater
than the increase in CO2 forcing.
The moon, for example, is much cooler
than the
Earth, but as you noted, it radiates energy because it's temperature is above zero K. Certainly you are not suggesting that the
Earth has some «smart shield» around it that redirects the
radiation from the moon, but lets the sun's
radiation in.
The evolving
radiation balance of the
earth as seen in the satellite data shows that the energy added by the CO2 and feedbacks is more
than sufficient to explain the observed warming surface temperatures.
Now, when the energy received directly from the Sun at the surface of Venus is less
than 10 % of what we receive on
Earth, then there is less
than 10 % coming back as back
radiation — far less in fact.
Due to the
earth's spherical shape and orbital effects, annual incoming solar
radiation at the poles is so low, polar regions always radiate more heat back to space
than is ever absorbed locally.
The heat capacity of the ocean is 1,000 x greater
than the atmosphere, ocean is over 70 % of
earth's surface and
earth is warmed by
radiation from sun and GHE.
It would, but it would not make the surface hotter
than the Sun's
radiation could make it anywhere on
Earth.
If the
radiation from one molecule of carbon dioxide in every 2,500 air molecules could actually slow the rate of cooling of
Earth's surface, then the
radiation from water vapour should slow the cooling at least a hundred fold, making rain forests about 50 degrees hotter
than dry regions at similar latitudes and altitudes.
- Associated Press: Study says sun getting hotter Solar
radiation reaching the
Earth is 0.036 percent warmer
than it was in 1986, when the current solar cycle was beginning, a researcher reports in a study to be published Friday in the journal Science.
It lasts just nine years in
Earth's atmosphere but is about 34 times more potent at trapping infrared
radiation (the greenhouse effect)
than carbon dioxide, which is more abundant and lasts longer.
Or, put another way, methane is more effectual
than carbon dioxide at absorbing infrared
radiation emitted from the
earth's surface and preventing it from escaping into space.