Sentences with phrase «aerosols in the atmosphere cause»

Not exact matches

China «could cause some decreases [in stratospheric aerosols] if that is the source,» Neely says, adding that growing SO2 emissions from India could also increase cooling if humans are the dominant cause of injecting aerosols into the atmosphere.

The eruption of Mount Pinatubo in the Philippines in 1991 had an explosivity index of six and resulted in more than 800 deaths, devastated the surrounding landscape, and pumped enough aerosols and dust into the atmosphere to cause significant global cooling.

Several symposia have a local focus, including sessions on ecology and education in San Diego's Mission Bay Park and the causes and effects of aerosol particles in San Diego's atmosphere.

In particular, they propose that cloud changes associated with aerosol particles in the atmosphere could be causing the weekend effect, though other pollution processes can not be ruled out at this timIn particular, they propose that cloud changes associated with aerosol particles in the atmosphere could be causing the weekend effect, though other pollution processes can not be ruled out at this timin the atmosphere could be causing the weekend effect, though other pollution processes can not be ruled out at this time.

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.

Laboratory chamber walls have been stealing vapors, causing researchers to underestimate the formation of secondary organic aerosol in the atmosphere.

These two chemicals are found in aerosols and chemical solvents and have been known to cause the thinning of the ozone layer in our own atmosphere.

Forcing caused by changes in the Sun's brightness, by dust in the atmosphere, or by volcanic aerosols can also be translated into radiative forcing.

Secondary organic aerosols are formed through complex physical and chemical interactions between pre-existing aerosols in the atmosphere and trace organic gases emitted from both human - caused and natural sources.

Paraphrasing the text in the post, aerosols that are input into the atmosphere, due to their spatial heterogeneity, also cause regions of heating or cooling that the atmosphere can respond to by changing its circulation — and that might have further climate effects in places far away from where the aerosols are input.

«A rapid cutback in greenhouse gas emissions could speed up global warming... because current global warming is offset by global dimming — the 2 - 3ºC of cooling cause by industrial pollution, known to scientists as aerosol particles, in the atmosphere.»

This is a peer reviewed paper by respected scientists who are saying that aerosol forcing means that the majority of the warming caused by existing co2 emission has effectively been masked thus far, and that as aerosols remain in the atmosphere for far shorter a duration of time than co2, we will have already most likely crossed the 2 degree threshold that the G8 politicians have been discussing this week once the cooling effect of aerosols dissipate.

These analyses indicate that it is likely that greenhouse gases alone would have caused more than the observed warming over the last 50 years of the 20th century, with some warming offset by cooling from natural and other anthropogenic factors, notably aerosols, which have a very short residence time in the atmosphere relative to that of well - mixed greenhouse gases (Schwartz, 1993).

These were intriguing, as well as highly speculative: first the possibility of deliberately using additional targeted aerosol injection to stimulate coagulation of the particles in the volcanic aerosol; mitigating its effects by causing the particles to drop out of the atmosphere more swiftly.

This cooling was from the same root cause as volcanic cooling, namely aerosols (mostly sulfate aerosols) in the atmosphere.

Causes, and they are multiple, appear to be: 1) Natural variability of ocean to atmosphere sensible and latent heat flux 2) Modest increase in natural volcanic aerosols 3) Slight decrease in solar output

12 * ICE AGES: More elliptical orbit causes less sunlight to reach Earth — results in ice ages (100,000 yr cycles) * VOLCANIC ACTIVITY: Release ash and aerosols into the atmosphere Reflects sun rays causing cooler temps * SOLAR ENERGY: Cause short term changes Less solar energy can cause small iceCause short term changes Less solar energy can cause small icecause small ice ages

Meanwhile, production of greenhouse gases — which linger in the atmosphere much longer than sulfate aerosols — has continued, causing average global temperatures to rise.

Dennie: I am slowly coming to the realization that the planet is heating up not only from greenhouse gasses and aerosol particulates holding in heat, but that the major cause of the increased atmospheric heat is due to microwave technology and the exponential increase in its saturation of the entire global atmosphere.

Scientists believe that the combination of growing quantities of man - made aerosol particles in the atmosphere and more moisture have caused the cloud cover to thicken.

Aerosols have both natural and human sources, so if we just assume aerosol concentration variation in the atmosphere will continue as it has for the last 165 years, then future AGW can be projected with TCR (1 + beta) where beta is the historical fraction of CO2 radiative forcing caused by all other GHG and aAerosols have both natural and human sources, so if we just assume aerosol concentration variation in the atmosphere will continue as it has for the last 165 years, then future AGW can be projected with TCR (1 + beta) where beta is the historical fraction of CO2 radiative forcing caused by all other GHG and aerosolsaerosols.

Tropospheric aerosols play a crucial role in climate and can cause a climate forcing directly by absorbing and reflecting sunlight, thereby cooling or heating the atmosphere, and indirectly by modifying cloud properties.

The Sulfate cooling mechanism is also evidenced whenever there is a high ejecta mass volcanic eruption, which causes a measurable cooling effect, for about 3 years after an eruption; until the sulfate particulate aerosols diminish in the atmosphere to the point that they become negligible.

There, he co-authored an article for Science arguing that the warming effect caused by rising amounts of carbon - dioxide in the atmosphere would be swamped by the cooling effect caused by aerosol pollution like dust and smoke.