Sentences with phrase «aerosol pollution from»

The newer models project a greater reduction in future aerosol pollution from countries like India and China.

«Recent climate modelling at CSIRO shows that there may be important effects on Australian climate due to aerosol pollution from the Northern Hemisphere.

I'll let John Philips dig up the studies but just to add a little more explanation: It is not only that the sulfate aerosol pollution from First World countries started to decrease, it also has to do with the different residence time of CO2 and of sulfate aerosols in the atmosphere.

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.

During this event, the aerosols stayed close to the surface due to the presence of a anticyclone hovering over the study region at sea - level, «reducing the amount of shortwave irradiance reaching the surface and causing greater radiative cooling,» states Obregón, who likens the effects of desert dust with those resulting from certain forest fires or episodes of high pollution.

«It is therefore reasonable to expect that precipitation extremes will continue to intensify,» although how much is still a mystery, largely thanks to an unclear understanding of the atmospheric impact of how tiny flecks of pollution in the atmosphere — known as aerosols to scientists and comprising materials ranging from soot to sulfur dioxide.

According to a report that used INDOEX data and was published last month in Science, aerosols from man - made pollution may also play a role in weakening the planet's water supply.

Aerosols from the production of heavy oil is a growing climate and pollution concern because new tar sands developments are on the drawing board in Venezuela, Utah and elsewhere, the study says.

Aerosols in urban air pollution and from major industries such as the Canadian tar sands are of concern to scientists because they can affect regional climate patterns and have helped to warm the Arctic.

Using climate models and data collected about aerosols and meteorology over the past 30 years, the researchers found that air pollution over Asia — much of it coming from China — is impacting global air circulations.

The basic comparison should be with the net forcing (around 1.8 W / m2 from GHG, solar, aerosols etc.) and the 0.02 W / m2 from thermal pollution.

It comes from ARM and James Hansen's references to global dimming developing from clouds being enhanced and or formed by pollution, sulfates, and or certain aerosols and so forth.

Although records are sparse, pan evaporation is estimated to have decreased in many places due to decreases in surface radiation associated with increases in clouds, changes in cloud properties and / or increases in air pollution (aerosols), especially from 1970 to 1990.

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).

Unfortunately, the exact mechanisms of interactions between clouds and tiny aerosol particles from pollution, dust, and soot remained largely a mystery.

A large portion of secondary organic aerosols - tiny particles in the air we breathe that contribute to cloud formation and precipitation - arise from a combination of man - made pollution and molecules given off by plant matter.

CHAPEL HILL, N.C. — David S. Ensor, retired civil and chemical engineer, was honored April 11 with the Washington State University Alumni Association's Alumni Achievement Award for internationally recognized contributions to aerosol science that have helped protect workers and the public from potential air pollution hazards.

The only «necessity» prompting the introduction of the aerosol pollution hypothesis is the necessity of rescuing a failing theory from falsification

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).

If you want to assume that aerosols resulting from pollution produced by the burning of fossil fuels were responsible for the cooling evident from 1940 through the late 70's, then you have no reason to claim ANY degree of warming due to CO2 forcing during any earlier period.

The basic comparison should be with the net forcing (around 1.8 W / m2 from GHG, solar, aerosols etc.) and the 0.02 W / m2 from thermal pollution.

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.

Then in 2000 he saw the temperature dip and said that maybe CO2 and aerosols are now canceling each other out — lets concentrate on soot (from human pollution).

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).

One theory is the decline in temperature from 1940 to 1970 was due to increased aerosols from pollution that caused a negative feedback.

PACific Dust EXperiment «The long range transport of dust and anthropogenic aerosols (e.g, black carbon, organics and sulfates, and air pollution from Eurasia, across the Pacific Ocean, into North America is one of the most wide spread and major pollution events on the planet.

Against these possibilities, there is currently a net cooling effect, equivalent to around 50 ppm, from aerosols associated with air pollution.

Stepping back from there, Hansen looks at 1940 and above: «The approximate stand - still of global temperature during 1940 - 1975 is generally attributed to an approximate balance of aerosol cooling and greenhouse gas warming during a period of rapid growth of fossil fuel use with little control on particulate air pollution, but quantitative interpretation has been impossible» That's the excuse and it is laughable.

«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».»

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.

Just a temporary cooling from increases in aerosol pollution.

Probably because of both mid-century «global dimming» from aerosols, and subsequent «global brightening» from reduced aerosol pollution, a different interval — e.g., 1976 to the present — would have required a very different dividing up of attributions.

And, backed by science from James E. Hansen of «coal death train» fame, Al Gore will spearhead the new drive to save our planet by shutting down all coal - fired power stations in order to stop aerosol and particulate pollution that is hastening the man - made global winter.

There is one aspect of climate change that is not fully established: the role of aerosol pollution (aka global dimming) from mainly from sulfates and soot (black carbon and organic carbon).

The middle decline is mostly (we think) from anthropogenic aerosol pollution.

We always thought that — apart of course from soot [15 % of climate warming]-- such aerosol pollution creates cooling — as in the case of Chinese sulfur pollution and the Asian (Indian) brown cloud — and that air quality measures over recent decades in North America and Europe are now actually a major cause of increased warming speeds there — as the actual temperature catches up on the «CO2 baseline».

New information from dedicated recent and future field campaigns is expected to shed light on organic aerosol formation processes and how they are altered in the presence of anthropogenic pollution.

Less cooling from aerosols means there is less masked warming waiting in the wings for when the skies are eventually cleaned by pollution regulation.

Perhaps one of the factors in the cooling that occurred from the 1930s to the 1970s was this aerosol pollution, counteracting the expected warming from CO2 emissions, and the warming since the 1970s is a direct result of air pollution regulations that have decreased emissions of all kinds of particulates.

(Part of the How to Talk to a Global Warming Skeptic guide) Objection: Scientists claim that global warming from greenhouse gases is being countered somewhat by global dimming from aerosol pollution.

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.

If we account for the cooling effect of sulphur aerosols from industrial pollution, greenhouse gases have already contributed 2 ℃ of global warming.

It would involve gradually eliminating pollution from factories and tailpipes; replacing them with artificial aerosols in the upper atmosphere where they're much less likely to damage human health; and then hope nothing (else) goes seriously awry.

Not counting the 0.9 degrees Ramanathan and Feng have pointed to waiting in the form of hidden deferred warming from aerosols that will be «unmasked» when fossil air pollution or fossil energy production stops and the likelihood of another 1.0 degrees C coming in the least time it will take to actually stabilize greenhouse emissions.

In reality, the extra ocean heating has been from the burst of Asian aerosol pollution making clouds less reflective so more SW energy enters the oceans and it is SW that does the heating.

As aerosol pollution is predicted to decrease over the next few decades, unmasking of the greenhouse effect may lead to accelerated global warming.storms and ocean plankton The human - generated aerosols are derived from industry, motor vehicles and vegetation burning.

In the United States, new research from the City College of New York on the effects of particle pollution on weather patterns around Manhattan has shown that aerosols can either increase or decrease local rainfall, sometimes creating situations where one area will be deluged while a neighboring town will remain dry.

The identification of other, sometimes more powerful, greenhouse gases such as methane, the contributions to atmospheric carbon dioxide from other human activities such as deforestation and cement manufacture, better understanding of the temperature - changing properties of atmospheric pollution such as sulphur emissions, aerosols and their importance in the post-1940s northern hemisphere cooling: the knowledge - base was increasing year by year.

Such forcings include greenhouse gases, volcanoes, solar activity and air pollution — for example, aerosols from coal burning, smog and volatile organics.