Sentences with phrase «for absorbing sunlight»

The imaging system detects fluorescence emitted from chlorophyll, a pigment that gives plants their green color and is essential for absorbing the sunlight plants use to create energy through photosynthesis.

Not exact matches

Because it absorbs sunlight better, which is required for the processing of vitamin D. Genetic differences that are advantageous to the survival of the species have a higher rate of survival and reproduction, and over eons of time, through geographic isolation and genetic draft, new species arise from the old.

Especially chlorophyll, the green pigment that absorbs energy from sunlight, has been touted for its healing benefits.

Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant.

The tiny particles also serve as condensation nuclei for clouds and are trapped between cloud particles, where their ability to absorb heat helps dry up those clouds and allows more sunlight to reach Earth.

Trapping light with an optical version of a whispering gallery, researchers at the National Institute of Standards and Technology (NIST) have developed a nanoscale coating for solar cells that enables them to absorb about 20 percent more sunlight than uncoated devices.

Overweight / obese blacks are at increased risk for vitamin D deficiency because darker skin absorbs less sunlight — the skin makes vitamin D in response to sun exposure — and fat tends to sequester vitamin D for no apparent purpose, says Dong, the study's corresponding author.

Black carbon aerosols — particles of carbon that rise into the atmosphere when biomass, agricultural waste, and fossil fuels are burned in an incomplete way — are important for understanding climate change, as they absorb sunlight, leading to higher atmospheric temperatures, and can also coat Arctic snow with a darker layer, reducing its reflectivity and leading to increased melting.

«You can't use today's commercially available switchable glass for this application because in the darkened state the windshield still absorbs sunlight and becomes hot,» said Goossen.

The approach itself is relatively simple: Since steam is generated at the surface of a liquid, Ghasemi looked for a material that could both efficiently absorb sunlight and generate steam at a liquid's surface.

For millennia, Greenland's ice sheet reflected sunlight back into space, but satellite measurements in recent years suggest the bright surface is darkening, causing solar heat to be absorbed and surface melting to accelerate.

The iron minerals have special qualities — They absorb harmful ultraviolet radiation, but the part of the sunlight needed for photosynthesis can still be used by organisms.

A possible cause for the accelerated Arctic warming is the melting of the region's sea ice, which reduces the icy, bright area that can reflect sunlight back out into space, resulting in more solar radiation being absorbed by the dark Arctic waters.

The darkest blue indicates deeper water, but it's also this shade for another reason: the rich blue hue comes from dye added to speed up the rate at which the water absorbs sunlight and warmth, aiding evaporation.

The weak but nevertheless detectable SIF signal emerges naturally on sunlight - exposed leaves, when chlorophyll molecules are excited by absorbed photons, and is a proxy for plant photosynthesis.

Grasses, for instance, develop thicker leaves, which are able to utilize the direct sunlight in the upper layer of a meadow while clover species sprout larger but thinner leaves to absorb the weaker light close to the ground more effectively.

Perovskites could also harness solar energy in new applications where traditional silicon cells fall flat — as light - absorbing coatings on windows, for instance, or as solar panels that work on cloudy days or even absorb ambient sunlight indoors.

A principle limitation of efficient photosynthesis is that organisms absorb more light in full sunlight than they can use effectively, thus plants have evolved a variety of mechanisms for photoacclimiation, including a mechanism described in the current new findings.

Scientists have in the past focused on above - ground characteristics, primarily leaf traits and the efficiency with which plants absorb sunlight for photosynthesis, he said.

One of those complex interactions is aerosols, the microscopic particles of dust, soot, and chemicals dispersed in the atmosphere that scatter or absorb sunlight and act as seeds for cloud formation.

For example, sunlight bleaches the brown particles white, reducing the amount of heat the particles absorb.

The scientists focused on bismuth vanadate, a thin - film semiconductor that has emerged as a leading candidate for use as a photoanode, the positively charged part of a photoelectric cell that can absorb sunlight to split water.

The earth absorbs more sunlight during the southern hemisphere summer when the darker (all that ocean) southern hemisphere is pointed more towards the sun This seasonal cycle may be large enough to overwhwlm the warming from CO2 etc for a year or so, thus on a seasonal scale the rise may not be monotonic.

While NASA's Wide - field Infrared Survey Explorer (WISE) failed to the tell - tale warmth of gas giants like Saturn within 10,000 AUs and larger than Jupiter objects out to 26,000 AUs (NASA / JPL news release), an icy «super-Earth», would have been too cold and faint for WISE to detect — even if the hypothesized planet has a small internal heat source and absorbs some sunlight.

Hot spring water rich in silica and other minerals absorbs all the colors of sunlight except for the deep blues that make many of Yellowstone's hot springs so beautiful.

You can thank them for the light skin you have to efficiently absorb the sunlight's rays so try and forget about the out of Africa theory and focus on what was given to you so you can adapt to your own land.

The first thing that catches your eye, of course, is the white leather that covers the seats and parts of the dash; it's some pretty blinding stuff, and I'd probably avoid it because a) it looks way too pretty for my liking and more importantly, b) white leather scuffs, it absorbs dye from your wet jeans and it's blindingly reflective in direct sunlight.

Direct sun exposure is required for vitamin D production and our modern, mechanized life prevents us from «coming to the surface» long enough to absorb direct sunlight.

At modern day concentrations, CO2 does not matter much for absorbing / reflecting incoming sunlight, though in a very, very dense CO2 atmosphere it would.

How much sunlight is absorbed by the corn plants needed to manufacture one joule's worth of ethanol, for example, compared to the amount of sunlight a solar panel needs to generate one joule of electricity?

For example, if ice extent increases, the increase in reflective surface will mean that more sunlight is reflected back into space without ever having its energy absorbed into the Earth system.

The argument for geoengineering goes like this: the world is getting inexorably warmer; governments show no sign of drastically reducing greenhouse gas emissions, so why not control the planetary thermostat by finding a way to filter, block, absorb or reflect some of the sunlight hitting the Earth?

The exposed open water caused by the wind divergence may absorb some additional sunlight and melt more ice than usual over the next few weeks (temperature - albedo feedback)[related NASA animation], but given that the sun is well on its way to setting for the winter, I think this effect will be fairly minimal.

While they are gone for how ever many millenia the climate system will be absorbing more sunlight, and more thermal radiation will be produced.

All sorts of things have been blamed for why climate models don't match reality - sunlight blocking soot, solar activity changes, and heat absorbed by oceans.

[And for those more technically - minded persons, yes, I agree that the effective radiating temperature of the Earth in the infrared is determined by how much sunlight is absorbed by the Earth.

Because clouds affect sunlight absorbed at the Earth's surface, excluding them means «the range that we estimate for climate sensitivity may be too narrow,» he said.

Large chunks of the Arctic ocean now absorb 90 % of sunlight instead of reflecting it in summer.That is 900 % increase for those square miles affected.

It has been noted for several decades that climate models tend to predict that Earth will become more sensitive to CO2 as, for example, polar ice melts, exposing open ocean and land that absorb rather than reflect sunlight.

Co2 can only cause the effect where there is extra radiation for it to absorb, in the low sunlight model there is less available radiation in the bandwidths that would already be more than saturated by elevated co2.

The lower sunlight means less radiation to be absorbed by co2, you can not make up for lower input because there is a limit on availability of radiation to absorb by co2.

ALBUQUERQUE, N.M. — Sandia National Laboratories engineers have developed new fractal - like, concentrating solar power receivers for small - to medium - scale use that are up to 20 percent more effective at absorbing sunlight than current technology.

The tiles will absorb the sunlight and turn it into energy to power the homes they're affixed to either immediately or by storing that energy in a battery for use later.

For example, road tar surfaces receive radiation (solar spectrum) from incident «sunlight»; some of which is absorbed and some reflected, so the surface warms, and re-radiates in a completely different thermal spectrum that depends on the surface temperature and its spectral emissivity.

For a stable climate, the sunlight absorbed by the planet must be balanced by thermal infra - red radiation emitted to space.»

«The most relevant part of that universal what - else is the requirement laid down by thermodynamics that, for a planet at a constant temperature, the amount of energy absorbed as sunlight and the amount emitted back to space in the longer wavelengths of the infra - red must be the same.

more carbon dioxide in the lower atmosphere means more little «point sources» for more absorbed EM in the infrared part of the spectrum, (infrared that re-radiated from the earth's surface after sunlight hit it and got absorbed); and since point sources radiate in a spherical pattern, that means more «back radiation» to earth, on balance... and this changes the «standing pattern» of energy flow in and out of the earth system, creating a time differential, so it starts to re-adjust...

Similar thing for land... sunlight passes through the atmosphere and it is absorbed by the land surface.

While pollution in some areas provides nuclei for water to condense on to form clouds, in other places there may be soot particles, which could absorb sunlight and cause the cloud to burn off (evaporate) during the day, leaving less cloud to warm the night.

At a recent House hearing, five top scientists stated that black carbon could account for close to 16 % of the planet's gross warming and that it may be second only to carbon dioxide in its potency as a GHG — ahead of methane.The black carbon absorbs incoming sunlight, converting it into infrared radiation and emitting it to the atmosphere — a process we outlined in an earlier post describing the impact of «dirty snow» on global warming.