Sentences with phrase «by dust emission»

With higher frequencies swamped by dust emission and lower frequencies by another «foreground» called synchrotron radiation, 150 gigahertz sat at a sweet spot with minimal contamination.

Overall, based on 13 yr of data, a relatively contrasting pattern in trends appears to have emerged in the tropics / subtropics largely modulated by dust emissions and transport processes encompassing the Saharan arid lands and the Arabian Peninsula and their downwind oceanic regions, with downward and upward tendencies, respectively.

Not exact matches

Field studies in southeastern Morocco, just a few kilometers away from the site of this dust storm, show that electric fields generated by blowing sand boost dust emissions up to 10 times more than expected from wind alone.

«The emission can be absorbed by thick clouds of gas and dust covering the AGN,» Boorman continues.

The now hyper - arid Sahara desert was characterized by a lush extent of grass and consequently reduced dust emission due to changes in Earth's orbital parameters.

- The giant radio telescopes of NASA's Deep Space Network — which perform radio and radar astronomy research in addition to their communications functions — were tasked with observing radio emissions from Jupiter's radiation belt, looking for disturbances caused by comet dust.

The map can't directly help with the dust controversy — the area of the sky mapped by BICEP2 is masked in the early map because the emission is very weak and researchers are still analyzing it.

A cooperative study by the USDA - ARS and Washington State University researched the effects of growing oilseed crops — camelina and safflower — on blowing dust emissions.

Dairy farm waste, soil blown from farmlands, pesticides, industrial emissions, vehicle exhaust and dust particles kicked up by cars and the big rigs ferrying produce down Interstate 5 and Highway 99 — the valley's two main arteries — have made this one of the smoggiest places in the nation.

At short wavelengths the ripples might have been caused by emission from dust in the Galaxy.

Human - associated bacteria disperse into and throughout the built environment by three primary mechanisms: (1) direct human contact with indoor surfaces; (2) bioaerosol particle emission from our breath, clothes, skin and hair; and (3) resuspension of indoor dust containing previously shed human skin cells, hair and other bacteria - laden particles.

So, the biggest difference between AGN types is that Type Is are surrounded by more dust and gas, therefore rejecting more matter and fueling far higher energy emissions than Type IIs.

The dust grains can be spotted by looking for thermal emission extending from the far infrared through millimetre wavelengths.

LABOCA measures incoming radiation by registering the tiny rise in temperature it causes on its detectors and can detect emission from the cold dark dust bands obscuring the stellar light.

A number of similar black hole exploration methods have also been proposed in optical / infrared spectra so far, but one crucial problem is that emissions at these wavelengths are absorbed by interstellar dust particles although the more active black holes contain more dust particles.

These star - formation rate estimators include the ultraviolet light that is emitted from young stars, the infrared light that shows how much of the ultraviolet light was absorbed by dust, and the nebular emission lines that are caused by young stars making the clouds of gas around them glow and radiate.

This study makes the first direct comparison between the optical emission line and the ultraviolet and infrared tracers of star formation and indicates that, despite the underlying uncertainties, astronomers can trust the nebular emission lines as robust indicators of the star - formation rate and the amount of light that is obscured by dust in distant galaxies.

The Trifid Nebula is a brilliant red emission nebula that appears to be divided into three regions by dark dust alleys.

The majority of these systems are unresolved and analysis of the dust properties is limited by the lack of information regarding the dust location.vThe Herschel DUNES key program is observing 133 nearby, Sun - like stars (< 20 pc, FGK spectral type) in a volume limited survey to constrain the absolute incidence of cold dust around these stars by detection of far infrared excess emission at flux levels comparable to the Edgeworth - Kuiper belt (EKB).

We aim at analyzing observations of the polarized dust emission by disentangling the effects on the polarization signal in the context of 3D radiative transfer simulations.

This excess emission is likely due to the scattering of stellar light by circumstellar dust and / or the thermal emission from a yet unknown population of hot dust, although hot gas emitting in the continuum can not be firmly excluded.

The warmer dust component is spatially correlated well with the [O III] emission and hence likely to be associated with the highly - ionized gas locally heated by intense radiation from the two clusters.

In each of the three bands, we have not detected a signature of the central excess component in contrast to the previous report on the det... ▽ More We have undertaken a search for the infrared emission from the intracluster dust in the Coma cluster of galaxies by the Multiband Imaging Photometer for Spitzer.

«Although none of the present models is fully satisfactory, neutral gas emission through water loss by Deimos at a rate of about 1023 molecules per second, combined with a charged dust coma, is favored.»

We deconvolved the cold and warm dust emission components spatially by making the best use of the multi-band photometric capability of the FIS.

From its spatial coincidence with the X-ray plasma outflow, the extended FIR emission is very likely to represent outflowing dust entrained by superwinds.

Detection of the spiral's dust in a bi-symmetric structure provides strong evidence of its position deep inside the giant elliptical host while the vast amounts of radio, visual, and x-ray emissions are a result of the energy released by this continuing galactic merger (or «consumption» of a satellite galaxy).

Our indoor air quality is affected by pollutants from household chemicals, dust and pet dander in addition to emissions from electronics.

We are setting the benchmark for sustainable outdoor cleaning by creating products that help to eliminate emissions, control dust and reduce noise pollution.

But it's important to emphasize that if southwest North America moves into a dust bowl by mid-century or later (PNAS Irreversible climate change due to carbon dioxide emissions, http://www.pnas.org/content/early/2009/01/28/0812721106.full.pdf+html), there will be suffering closer to home, even for people on other parts of the continent.

It is used for dust in the interstellar medium which has continuous opacity as a function of frequency but it is not really gray but rather has lower opacity at lower frequency, Thus a layer which is opaque in up welling emission may be transparent in down welling absorption so that the next layer out sees its own down welling emission canceled by emission from the opposite side in the approximation of complete transparency at the appropriate frequencies for the inner shells.

Toxic emissions from the smokestacks — unwittingly called «cloud factories» by local kids — would waft over the sky in Little Village, while coal dust from the plants» stockpile settled onto houses and school grounds.

Since coming to PNNL, he has led or been significantly involved in studies of effects of surface heterogeneity on boundary layer structure, of mesoscale atmospheric flows induced or modulated by complex terrain, of the simulation of dust emission by wind erosion, and of the capabilities of a variety of atmospheric instruments — including a mass spectrometer and wind profiling radar — for measuring atmospheric turbulence.

Thirdly, urban agriculture and urban forestry contribute to disaster risk reduction and adaptation to climate change by reducing runoff, keeping flood plains free from construction, reducing urban temperatures, capturing dust and CO2, while growing fresh food close to consumers reduces energy spent in transport, cooling, processing and packaging, whilst productive reuse of urban organic wastes and wastewater (and the nutrients these contain) reduces methane emissions from landfills and energy use in fertilizer production.

It will also target dust and metal emissions, aiming to reduce those by 35 to 40 per cent.

The RF due to dust emission changes induced by circulation changes between 1750 and the present are difficult to quantify and not included here (see also Section 7.5).

The second part of the dissertation analyzes dust emission in an atmospheric general circulation model (AGCM), where realistic simulation is inhibited by the model's coarse resolution compared to the scale of the circulations observed to mobilize dust.

-- Volcanoes and vents emit less than 1 % of human emissions (even the Pinatubo eruption caused a dip in the CO2 increase, as the cooling by the volcanic dust increased the absorption of the oceans beyond the extra emissions.

(b) Sources (S1 to S10) and typical depositional areas (D1 and D2) for Asian dust indicated by spring average dust emission flux (kg km — 2 per month) averaged over 1960 to 2002.

Perlwitz et al. (2001) estimate that this feedback reduces the global dust load by roughly 15 %, as dust radiative forcing reduces the downward mixing of momentum within the planetary boundary layer, the surface wind speed, and thus dust emission (Miller et al., 2004a).

By 2080, without dramatic reductions in emissions, southern Europe will be in permanent extreme drought, much worse than the American dust bowl ever was.

Cakmur, R.V., R.L. Miller, J.P. Perlwitz, I.V. Geogdzhayev, P. Ginoux, D. Koch, K.E. Kohfeld, I. Tegen, and C.S. Zender, 2006: Constraining the global dust emission and load by minimizing the difference between the model and observations.

Future climate change may cause significant air quality degradation by changing the dispersion rate of pollutants, the chemical environment for ozone and aerosol generation and the strength of emissions from the biosphere, fires and dust.

Dust emissions from the Regional Atmospheric Modeling System (RAMS)(36) coupled online with the Dust Production Model (37 — 40) have been calculated for 2001 by using a horizontal resolution of 50 km both in x and y directions over 0 ° E to 27 ° E and 12 ° N to 27 ° N with 30 vertical levels from ground to 22 km, including 12 levels from surface to 1.2 km.

Whether for the period beginning on 26th February 2002 the Claimants» complaints of nuisance as a result of phenolic, sulphurous or other odurs, noise, smoke abd fumes and particulate matter / dust are complaints about emissions caused by the Defendant as a result of the management and operation of its foundry business at Norton Canes, Cannock, Staffordshire.