Sentences with phrase «radiation from the sun at»

In many Mediterranean climates there is a strong diurnal character to daily temperatures in the warm summer months, due to the great loss of ultraviolet radiation from the sun at night.

Atmospheres absorb incident radiation from the Sun at all altitudes, and radiate it away until they cool to the predetermined thermal profile.

Not exact matches

Darin Toohey, a professor at the University of Colorado's atmospheric and oceanic sciences department and one of the paper's authors, says black carbon absorbs shortwave radiation from the sun, causing the atmosphere to heat up.

It's found out that natural UV radiation from the sun may increase by about 25 % at the beach, as it is reflected by the water and yellow sand.

The UV index is an international standard measurement of how strong the ultraviolet (UV) radiation from the sun is at a particular place on a particular day.

And while ozone high in the atmosphere helps shield Earth from the sun's ultraviolet radiation, at ground level, it mixes with fine particulates to form breath - choking smog.

This is where radiation from distant stars is brought to a focus by the Sun's gravitational field, which would allow a visiting probe to resolve objects at the centre of...

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.

Mark Loeffler at Northern Arizona University irradiated ammonium hydrosulphide, commonly found in Jupiter's atmosphere, with high - energy protons that mimic radiation coming from the sun.

The Sun's radiation pressure and solar wind accelerate materials away from the comet's head at differing velocities according to the size and mass of the materials.

A dog's fur is quite effective at preventing the sun's radiation from reaching his skin.

Over time, the sun bleached away the color, leaving behind ghostly impressions, the brightest in the center where the glass of the skylight shone the light of the sun most directly, fading along the sides where it cast in at angles, and dimmest along the edges where the fabric was concealed from the sun's radiation.

The stratosphere absorbs short wave (UV) radiation from the sun but is not hot enough to radiate much at short wavelengths.

The paragraph in the OP you quote from as well as the one above it in full are saying that the ice age cycles result from the Earth's changing orbit round the sun which creates changes in the «incoming solar radiation (insolation) at high latitudes» (Roe (2006) PDF).

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).

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.

Waters at this depth can not be warmed directly by the sun or greenhouse effect as solar radiation penetrates only to 100 metres depth, while infra - red radiation from the greenhouse effect can only warm the immediate surface «skin» of the ocean.

Although only 1 percent of the sun's energy is emitted at ultraviolet wavelengths between 200 and 300 nanometers, the decrease in this radiation from 1 July 1981 to 30 June 1985 accounted for 19 percent of the decrease in the total irradiance over the same period.»

Total solar irradiance - The amount of solar radiation received outside the Earth's atmosphere on a surface normal to the incident radiation, and at the Earth's mean distance from the Sun.

No publication discusses a greenhouse effect specifically at the poles, so don't bother me with links to all the «runaway greenhouse» garbage (which I've studied for thousands of hours) because there's only 1W / m ^ 2 going in from the Sun, and so no more coming out into the atmosphere, and so no more coming down again as back radiation.

At one point Dr. Chu thought that painting roofs and other structures white would help reflect the sun's radiation and save the nation and the world from global warming.

Memphis October 14, 2012 at 5:24 pm Myrrh's basic problem is that he doesn't seems to understand that radiation from the sun warms the earth.

If the troposhere is cold, that means sea surface also is cold, and it is still gaining shortwave energy from the Sun at the same rate while it radiates a lesser amount longwave radiation to space.

Memphis October 17, 2012 at 10:56 am Myrr when are you going to realise that NOBODY thinks that only visible radiation comes from sun.

Memphis October 16, 2012 at 1:43 am Myrrh So you are nowfinally going to stop pretending that radiation from the sun can not warm us?

The latter gives rise to a strong negative feedback between the surface temperature Ts and the temperature of «absolutely black body» Tbb, which is determined by the solar radiation S reaching the Earth's surface at its distance from the Sun.

This measure is available for the US from the BEST data set... The reconfirmation now of a strong sun - temperature relation based specifically upon the daytime temperature maxima adds strong and independent scientific weight to the reality of the sun - temperature connection... This suggests strongly that changes in solar radiation drive temperature variations on at least a hemispheric scale... Close correlations like these simply do not exist for temperature and changing atmospheric CO2 concentration.»

This must result in about 85 times as much infrared radiation from the Sun, at 3.3 microns wavelength, being sent back into space by the absorption and re-radiation from methane molecules in the upper atmosphere as could be re-radiated into the lower atmosphere for infrared radiation sourced from the warmed Earth.

Radiation comes in from the sun (solar radiation at short wavelengths), and every body radiates according to its temperature (proportional to the fourth power of absolute temperature), so that on Earth we, and the surface and atmosphere radiate at infrared wavelengths.

The radiation situation from the outer shell is complex because the sun only heats one half at a time and the flux is not uniform.

The temperature climbs much higher (than on Earth) so long as the lunar surface is basking in the sun, and drops much lower while the back radiation from outer space is only at 4 kelvins.

northern Scandinavia) cloudy days in November and December are typically warmer than cloud - free days because the Earth's surface has a net radiation loss at the time (i.e. outgoing heat loss exceeds radiation received from the sun).

Testimony to this assumption is the term that has been employed for more than a century to describe the radiation in all wavelengths received from the Sun: the so - called «solar constant,» whose value at the mean Sun - Earth distance is a little over 1 1/3 kilowatts per square meter of surface.

The increase of CO2 gives both the higher value of Tl due to the increased absorption of the outgoing surface radiation and the higher value of T after the radiation from the Sun is «switched off» at the evening.

If the radiation into space is at a lower rate than the arrival of radiant energy from the sun the planet heats up.

Now the sun would be expected to set up an undisturbed gradient from cold at the bottom to warm at the top but it does not because upward radiation from the surface plus energy drawn upwards by evaporation at the surface creates a layer 1 mm deep near the surface (the subskin) which is 0.3 C cooler than the water below it.

If the Sun were a massive ball of hydrogen, heated by a H - fusion reactor at its core, then changes at the solar core would be delayed by about 30 My (million years), the diffusion time for radiation from the core of the Sun to its surface [See William A. Fowler, «What cooks with solar neutrinos?»

However, the point is simply this: As long as you have an IR - absorbing atmosphere that is at a nonzero temperature, the earth's surface will have to be at a warmer temperature (in order to radiate away the energy that it receives from the sun) than it would be if the atmosphere did not absorb any of the IR radiation that the earth emits.

Notice that the Earth System mean temperature I had to use to provide 240 Watts / m ^ 2 of radiation to Space to balance the input absorbed from by the Earth System from the Sun was 255 K. However, the actual mean temperature at the Surface is closer to 288 K.

Ira said: «Notice that the Earth System mean temperature I had to use to provide 240 Watts / m ^ 2 of radiation to Space to balance the input absorbed from by the Earth System from the Sun was 255 K. However, the actual mean temperature at the Surface is closer to 288 K.

Otherwise, such a hypothesis does not even satisfy the First Law of Thermodynamics (basically, conservation of energy): Without substances in the atmosphere that absorb terrestrial radiation, the earth's surface at its present temperature would be emitting back out into space way more energy than it receives from the sun and hence would rapidly cool down.

Conclusion, CO2 (and its «back radiation») makes LITTLE difference, because at the same level of pressure on BOTH planets, the only thing that seems to matter is planetary distance from the sun.

In the experiment, cosmic radiation was passed through a large reaction chamber containing a mixture of lower atmospheric gases at realistic concentrations that was exposed to ultraviolet radiation from lamps that mimic the action of the sun's rays.

At sunrise, the sun's angle is 0 degrees, at noon 90 degrees, at sunset 0 degrees again, so the amount of radiation the equator is getting is 1368 watts / meter ^ 2 cos x. Integrate that cos x from sunrise, pi / 2, to sunset, - pi / 2, and you get 2 / pi for the average radiatioAt sunrise, the sun's angle is 0 degrees, at noon 90 degrees, at sunset 0 degrees again, so the amount of radiation the equator is getting is 1368 watts / meter ^ 2 cos x. Integrate that cos x from sunrise, pi / 2, to sunset, - pi / 2, and you get 2 / pi for the average radiatioat noon 90 degrees, at sunset 0 degrees again, so the amount of radiation the equator is getting is 1368 watts / meter ^ 2 cos x. Integrate that cos x from sunrise, pi / 2, to sunset, - pi / 2, and you get 2 / pi for the average radiatioat sunset 0 degrees again, so the amount of radiation the equator is getting is 1368 watts / meter ^ 2 cos x. Integrate that cos x from sunrise, pi / 2, to sunset, - pi / 2, and you get 2 / pi for the average radiation.

Multiple sources suggest that the energy from BB radiation at ~ 5700 K (eg from the sun) will be ~ 10 UV, ~ 40 % visible, ~ 45 % IR - A & IR - B (0.7 — 3 um), and ~ 5 % «thermal IR» (3 um and longer).

The «back radiation» component from GHG's and clouds is only about 140 W / m ^ 2 while the peak solar input exceeds 1000 W / m ^ 2 at the equator and even the mid morning Sun exceeds 300 W / m ^ 2 in most places across the planet.