Sentences with phrase «which aerosol pollution»

Not exact matches

The research focuses on the power of minute airborne particles known as aerosols, which can come from urban and industrial air pollution, wildfires and other sources.

Sulphate pollution from power stations and factory chimneys produces aerosol particles in the atmosphere which encourage clouds to form.

When the wind slows down, the concentration of small particles of air pollution (aerosols) increase, which help increase haze and leads to solar dimming in the area.

The question is: Does the current load of aerosols in the atmosphere already exceed that limit, in which case adding extra particles should not greatly affect cloud formation; or do they continue to be a limiting factor as pollution rises, so that added aerosols would continue to influence the clouds?

Indeed, conventional wisdom held that higher levels of aerosol pollution in the atmosphere should cool the earth's climate because aerosols can increase cloudiness; they not only reduce precipitation, which raises the water content in clouds, but they also increase the size of the individual water droplets, which in turn causes more warming sunlight to be reflected back into space.

Aerosol pollution also affects the formation of clouds, which are seeded with dust particles in the atmosphere.

The study, published Wednesday in the journal Nature, showed that the production of tar sands and other heavy oil — thick, highly viscous crude oil that is difficult to produce — are a major source of aerosols, a component of fine particle air pollution, which can affect regional weather patterns and increase the risk of lung and heart disease.

Dr Zongbo Shi, the corresponding author of this work, at the University of Birmingham said: «Air pollution dissolves iron in aerosols, which may help to fertilize the oceans.

The translation is that the little bugs that make methane in swamps get out - competed by other bugs that like acid rain (which is related to sulphate aerosols — mainly from power stations)-- so more industrial pollution, less methane emission (everything else being equal).

The translation is that the little bugs that make methane in swamps get out - competed by other bugs that like acid rain (which is related to sulphate aerosols — mainly from power stations)-- so more industrial pollution, less methane emission (everything else being equal).

From sheer thermal inertia of the oceans, but also because if you close down all coal power stations etc., aerosol pollution in the atmosphere, which has a sizeable cooling effect, will go way down, while CO2 stays high.

Which means, early in the century, there was more aerosols, especially as there was little pollution control, during a period of increasing warmth.

Volcanic events and some types of human - made pollution, both of which inject sunlight - reflecting aerosols (i.e., tiny particles) into the atmosphere, lower temperature and are examples of forcings that drive decreases in temperature.

Around 1975, pollution controls removed the sulfate aerosol brake from the CO2 freight train, which is careening out of control at more than 2 PPM increase per year (and the rate of increase is rising).

In the future, net radiation may be reduced through aerosol pollution, which will push the system qualitatively closer to the critical threshold (7).

«since the mid 1980s a significant increase in visibility has been noted in western Europe (e.g. Doyle and Dorling, 2002), and there are strong indications that a reduction in aerosol load from anthropogenic emissions (in other words, air pollution) has been the dominant contributor to this effect, which is also referred to as «brightening».»

Thus, aerosol pollution can either warm or cool the climate, depending on its chemistry, which in turn depends on the activity responsible for the pollution.

Rising population and over-grazing by livestock was the first theory but studies now show the drought resulted from changes in ocean surface temperatures Folland et al (1986) Giannini et al (2003) which are likely due in part to the sulphate aerosol pollution of Europe and North America Rotstayn & Lohmann (2002) Biasutti & Gainnini (2006) and thus it is the cleaning of emissions from power stations that has likely allowed the rains to return.

A study in mid-2012 found that the sky would look no different post-geoengineering than it currently does in urban areas, which have higher levels of aerosols due to pollution.

He also found that much of the effect was due to natural aerosols which would not be affected by human activities, so the cooling effect of changes in industrial pollution would be much less than he had calculated.

Second on the list is particle pollution, or aerosols, which partly counteract the greenhouse gases.

Generally, the trend has been attributed to an increase in sulfur pollution, which rapidly forms tiny particles in the air known as «aerosols» that reflect incoming solar energy back into space.

Researchers have blamed this short - lived cooling, more pronounced in the Northern Hemisphere, on a build - up of sunlight - blocking sulphate aerosols from fossil fuels, which began to clear in the 1970s as pollution controls took hold.

This is true, and has been attributed to higher levels of pollution aerosol particles, which commonly cause 20 % decreases in UV - B radiation in the summer (Wenny et.

In addition to the data from the radiometers, the Berkeley Lab scientists will get supplemental data by taking advantage of a separate, in - depth DOE climate study at the same location, which is using additional instruments and a balloon - borne sounding system to get information on temperature, cloud cover, the density and types of aerosols or pollution particles, heat fluxes and other climate variables like precipitation.