Sentences with phrase «cooling effects of volcanic eruptions»

But the simulations also reveal that the technique, which mimics the short - term cooling effects of volcanic eruptions, could chill the planet if overdone.

New UBC research shows that climate change may impede the cooling effect of volcanic eruptions.

Not exact matches

Besides SSCE, scientists have also been investigating stratospheric sulfur injections — firing sun - reflecting aerosols into the air, similar to the cooling effect after a volcanic eruption — and cirrus cloud thinning, where you thin the top level of clouds, which have a warming effect on the planet.

In this case, researchers are attempting to re-create the effects of volcanic eruptions to artificially cool Earth.

Interestingly, some scientists argue that without the cooling effect of major volcanic eruptions such as El Chichn and Mount Pinatubo, global warming effects caused by human activities would have been far more substantial.

Researchers know that large amounts of aerosols can significantly cool the planet; the effect has been observed after large volcanic eruptions.

Scientists have long known of the cooling effect of major volcanic eruptions, which spew large amounts of light - scattering aerosols into the stratosphere.

A few years ago, he was trying to get people to take to his idea of how to mitigate global warming by pumping sulfur dioxide into the stratosphere, mirroring the cooling effect caused by large volcanic eruptions.

It's also now well understood that large volcanic eruptions have a short - term cooling effect, see GW FAQ: effect of volcanic activity (short - term being the key phrase, after Church et al Nature 2005, and also http://www.llnl.gov/str/JulAug02/Santer.html)

It is also well known that volcanic activity has a cooling influence, and as is well documented by the effects of the 1991 Mount Pinatubo volcanic eruption.

The effects of aerosol injections are at least somewhat known, since volcanic eruptions produce aerosols naturally and have produced cooling in the past.

In other words, if we are after a cause (or causes) for the temperature increase during the period in question, the presence or absence of aerosols from volcanic eruptions is beside the point, because they can not explain any increase in temperatures that occurred prior to any cooling effect they might have had.

One of the things I'm having trouble with is the uncertainties of aerosals and their effects on cooling, or the possibility of volcanic eruptions producing particles that result in cooling.

Volcanic eruptions represent one kind of natural event whose lofting of sulfur dioxide high into the stratosphere can create tiny particles that can have a temporary cooling effect.

Volcanic activity was high during this period of history, and we know from modern studies of volcanism that eruptions can have strong cooling effects on the climate for several years after an eruption.

In fact, the major effect of significant volcanic eruptions is cooling due to the sulfate aerosols that they release (although in order to have a significant cooling effect, the eruption has to be large enough that it injects the aerosols into the stratosphere where they can stay around longer... and it apparently helps if the eruption is reasonably near to the equator).

It takes a couple of years for most of the aerosols from a large volcanic eruption to settle out of the air, so their cooling effect likewise lasts a couple of years.

It could be a relatively cheap, effective and quick way to cool the planet by mimicking the natural effects on climate of large volcanic eruptions, but scientists concede there could be dramatic and dangerous side effects that they don't know about.

In fact, the rate of change of CO2 levels actually drops slightly after a volcanic eruption, possibly due to the cooling effect of aerosols.

For example, the accumulated effect of volcanic eruptions during the past decade, including the Icelandic volcano with the impossible name, Eyjafjallajökull, may have had a greater cooling effect on the earth's surface than has been accounted for in most climate model simulations.

Aerosols from volcanic eruptions do have a cooling effect once they reach the stratosphere but the effect of high wind speed in the upper atmosphere would rapidly disperse these, and any local effects would be very slight.

If you take into account the two major volcanic eruptions in the beginning of the observed period which had an approximately five year cooling effect each you will find that there has actually been almost no warming since 1980.

This would replicate the cooling effect of large volcanic eruptions, which occasionally belch sulphur dioxide into the stratosphere.

But not only did Michaels make no mention of Scenarios B & C, he also never mentioned that Hansen's paper included the cooling effect of a major volcanic eruption (in Scenarios B & C) nor did he make any mention that one in fact occurred — Mt. Pinatubo (and neither does O» Donnell, at least the part you quoted).

Backing that up, NASA says that 1) sea surface temperature fluctuations (El Niño - La Niña) can cause global temperature deviation of about 0.2 °C; 2) solar maximums and minimums produce variations of only 0.1 °C, warmer or cooler; 3) aerosols from natural sources such as volcanic eruptions (Mount Pinatubo for example) have caused average cooling of 0.3 °C, but recent eruptions have had not had significant effect.

Nature has already done the proof - of - concept work: volcanic eruptions spew such particles into the air, and the cooling effect is well documented.»

The principle behind the idea is that high - altitude aerosols would cool the planet's surface by reflecting solar energy back into space, mimicking the effect of huge volcanic eruptions.

Climate engineering: To counter the effects of heat - trapping greenhouse gases, some experts have proposed artificially cooling the planet by injecting sulfates into the stratosphere, which would mimic the effects of a major volcanic eruption.

Proposals for addressing global warming now include geo - engineering whereby tiny particles are injected into the stratosphere to emulate the cooling effects of stratospheric aerosol of a volcanic eruption (Levitt and Dubner 2009).