Sentences with phrase «particle number concentration»
In this way the CCN measures activated ambient aerosol particle number concentration as a function of supersaturation.
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The particle number concentration also did not show an increase for RME; it even decreased substantially for ROR.
New results on the particle number concentrations in five European cities and in the whole of Europe
New results on the particle number concentrations in five European cities and in the whole of Europe
Not exact matches
The proportion of diesel vehicles registered in Leipzig however rose from 19 to 26 % between 2010 and 2016 — with negative consequences: While black carbon and the number concentration of ultrafine particles decreased, the concentration of gaseous nitrogen oxides (NOx) is stagnant and is still too high.
Pohlker, Andreae, and their colleagues ran the numbers and found that the amount of potassium particles released from microscopic fungi in the lab was indeed enough to account for the concentration of potassium they observed in their samples.
Seaton and his colleagues say that the number of particles may be more important than the concentration of pollution.
In one sentence: Researchers at Pacific Northwest National Laboratory found that when miniscule particles of airborne dust, thought to be a perfect landing site for water vapor, are modified by pollution, they change cloud properties via ice crystal number concentration and ice water content.
As detailed by Dr. Sniderman, «Two people can have the same overall LDL concentration, but very different levels of risk depending on whether they have a lot of small, dense LDL particles or a small number of large and fluffy particles.»
Bubble rafts increase the optical reflectivity of the ocean and when bubbles burst, they launch seasalt particles that loft and increase the number concentration of cloud droplets in the marine boundary layer, thus increasing the reflectivity of stratocumulus.
Annual and interannual variation in boreal forest aerosol particle number and volume concentration and their connection to particle formation Tellus 60B, 495 — 508.
Particle number to volume concentration ratios at two measurement sites in Finland.
Diurnal and annual characteristics of particle mass and number concentrations in urban, rural and Arctic environments in Finland.
Explaining global surface aerosol number concentrations in terms of primary emissions and particle formation.
According to theory (and computer models), seeding marine stratocumulus clouds with copious amounts of tiny sea water particles could significantly enhance cloud droplet number concentration, and thereby cloud reflectivity and longevity.
Because H2SO4 and MSA are known precursors to new particles, the number concentration of particles should also decrease significantly, as long as scavenging by existing particles is not important.
It is found that with a number concentration of aerosol particles of ∼ 102 — 103 cm − 3 (which corresponds to the aerosol density in the deposited layer of about 1 — 10 mg / m2 with the layer thickness along the ray path of about 100 m) the solar radiation attenuation with artificial aerosol layers accounts for 1 to 10 %.
It's really difficult, because while the isothermal case is simple, one has to solve an ODE to get the concentration with a lapse, then renormalize the result to have the right number of particles per unit area, and do this with a constrained surface temperature of (say) 300K.
Total number concentration was dominated by frequent new particle formation and particle growth events.
The size and concentration of aerosol particles is also of great importance for the number of cloud drops, which in turn influences the reflection characteristics of clouds.
The retrieved PSDs generally had lower concentrations of small ice particles, with total number concentration independent of temperature.
The research was conducted in the UK; The scientists started by measuring how much air pollution go into a certain number of houses in Lancaster using dust monitoring devices and by swiping surfaces and then analyzing what was collected with magnetic remanence, a technique that provides information on concentrations of iron - bearing particles.
Since the second figure appears hard to read: The vertical axis shows particle diameter (from 8 to 600 nm), the horizontal axis shows time (two days in total), color denotes number concentration, where blue is low, via green and yellow to red (= high).
The color gives the (normalized) number concentration, where the red color indicates the enhanced concentration of nucleated particles, growing into the CCN size range.