Sentences with phrase «at ultraviolet wavelengths»

Solar cycle variability is greatest at ultraviolet wavelengths, which are largely absorbed by the stratospheric ozone layer.

Radiation at ultraviolet wavelengths dissociates atmospheric molecules, initiating chains of chemical reactions — specifically those producing stratospheric ozone — and providing the major source of heating for the middle atmosphere, while radiation at visible and near - infrared wavelengths mainly reaches and warms the lower atmosphere and the Earth's surface1.

The change in total solar irradiance over recent 11 - year sunspot cycles amounts to < 0.1 %, but greater changes at ultraviolet wavelengths may have substantial impacts on stratospheric ozone concentrations, thereby altering both stratospheric and tropospheric circulation patterns... This model prediction is supported by paleoclimatic proxy reconstructions over the past millennium.

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.»

At ultraviolet wavelengths, Hubble's Cosmic Origins Spectrograph (COS) is sensitive to absorption from hot gas, which shows up as reduced brightnesses at specific colors in a spectrum.

It significantly enhances the spectroscopic capabilities of HST at ultraviolet wavelengths, and provides observers with unparalleled opportunities for observing faint sources of ultraviolet light.

New research led by astrophysicists at York University has revealed the fastest winds ever seen at ultraviolet wavelengths near a supermassive black hole.

Some observations of how cosmic molecules emit and absorb light at ultraviolet wavelengths have hinted that the fine structure constant, responsible for the strength of electromagnetism, is not the same throughout the universe.

In the past, researchers have focused on studying the corona at ultraviolet wavelengths from space, and at visible wavelengths from the ground.

Not exact matches

According to Mather and other leading astronomers now working on a report to be released this summer by the Association of Universities for Research in Astronomy (AURA), that quest and others require an even bigger space telescope that would observe, as Hubble does, at optical, ultraviolet and near - infrared wavelengths.

The Dalian Coherent Light Source, whose completion was announced today in Beijing, has a twist that makes it unique: It is the only large laser light source in the world dedicated to the particular range of short - wavelength light called vacuum ultraviolet, which makes it «a new tool for the detection and analysis of molecules undergoing chemical reactions,» says Alec Wodtke, a physical chemist at the Max Planck Institute for Biophysical Chemistry and the University of Göttingen in Germany..

Charged particles striking Saturn's upper atmosphere ionize hydrogen atoms and produce infrared radiation, whereas related processes also give off Saturnian auroras at ultraviolet and radio wavelengths.

The scientists then mapped the quasars with other telescopes and at wavelengths ranging from ultraviolet to far infrared.

«We tested ultraviolet LEDs from different sources and at different wavelengths.

Stuart Bowyer, from the University of California at Berkeley and a principal investigator of the EUVE, built an extreme ultraviolet detector for the mission, which found four stars at these wavelengths.

Dubbed the first planetary meteorological satellite by mission scientists, Akatsuki was supposed to orbit Venus for 2 years, using its five cameras operating at ultraviolet and infrared wavelengths to track clouds at different altitudes and watch for venusian lightning.

At the same time, an extreme ultraviolet imager on SDO can follow small features at eight different ultraviolet wavelengths that gauge temperatures from 20,000 ˚C to 1 million˚At the same time, an extreme ultraviolet imager on SDO can follow small features at eight different ultraviolet wavelengths that gauge temperatures from 20,000 ˚C to 1 million˚at eight different ultraviolet wavelengths that gauge temperatures from 20,000 ˚C to 1 million˚C.

They determined the planet's radius at 10 different wavelength bands, from 300 - nanometer ultraviolet light to 1000 - nanometer infrared.

The light - absorbing molecules break off from the chains when exposed to ultraviolet light at 350 nanometers wavelength, triggering degradation of the plastics.

The SDO can see extreme ultraviolet wavelengths that are blocked by Earth's atmosphere, allowing it to look at the part of the corona where the temperature suddenly rises.

They are electromagnetic waves like visible light but situated at the high energy / short wavelength end of the electromagnetic spectrum, between ultraviolet light and gamma rays.

The «colours» are due to differences in the surface temperature of starsw1: hotter stars emit most of their light in the visible blue or ultraviolet regions of the electromagnetic spectrum, whereas cooler stars radiate at longer wavelengths, in the visible red or infrared regions (see Mignone & Barnes, 2011a).

The probes will carry a similar array of spectrometers to those on MESSENGER, and will study the planet at many different wavelengths, including infrared, ultraviolet, X-ray and gamma ray.

One of the biggest changes is that unlike the Hubble — which looked at visible or ultraviolet wavelengths, in general — the JWST will be observing the universe primarily in the infrared spectrum.

The other operated at extreme ultraviolet wavelengths.

The Mars Color Imager (MARCI) is designed to acquire daily global images of Mars for at least 1 martian year (687 Earth days) at 5 visible wavelengths and 2 ultraviolet wavelengths.

She develops new molecules to induce acrylate polymerisation with light at longer wavelengths than the ultraviolet used now.

The Mars Reconnaissance Orbiter (MRO) Mars Color Imager (MARCI), shown here with a gloved hand for scale, is currently orbiting Mars and taking pictures used to monitor the weather by observing the entire planet every day at 5 visible and 2 ultraviolet wavelengths.

The images were obtained at wavelengths absorbed by the Earth's atmosphere by the Extreme ultraviolet Imaging Telescope.

Seven of them were successful, and analyzed the sun at ultraviolet and X-ray wavelengths and photographed the super-hot corona, among other achievements.

The HDST's unexcelled sharpness at ultraviolet and optical wavelengths would allow astronomers to see the stellar and nebulous contents of galaxies billions of light - years away with the same crispness that Hubble sees inside galaxies just tens of millions of light - years away.

The two MARCI units will provide global coverage of Mars at moderate and low resolution at ultraviolet, visible, and near infrared wavelengths.

The cocoon also explains other details of the event, such as the initial bright blue flash observed at ultraviolet and optical wavelengths, and the delay in the appearance of X-rays and radio waves.

Oxygen blocks a little of the ultraviolet light in the stratosphere, at shorter wavelengths than ozone.

Here is what the IPCC stated: «The Sun powers Earth's climate, radiating energy at very short wavelengths, predominately in the visible or near - visible (e.g., ultraviolet) part of the spectrum.

Most atmospheric absorption takes place at ultraviolet and infrared wavelengths, so more than 90 percent of the visible portion of the solar spectrum, with wavelengths between 0.4 and 0.7 μm (0.00002 to 0.00003 inch), reaches the surface on a cloud - free day.

The most highly variable parts of the Sun's spectrum of radiation are found at the very shortest wavelengths — the ultraviolet (UV) and X-ray region — and in the very longest and far less energetic band of radio waves.

Observational evidence suggests that some organic aerosol compounds from fossil fuels are relatively weakly absorbing but do absorb solar radiation at some ultraviolet and visible wavelengths (e.g., Bond et al., 1999; Jacobson, 1999; Bond, 2001) although organic aerosol from high - temperature combustion such as fossil fuel burning (Dubovik et al., 1998; Kirchstetter et al., 2004) appears less absorbing than from low - temperature combustion such as open biomass burning.