Sentences with phrase «causes volcanism»

Core convection produces Earth's magnetic field, which may influence surface conditions, and mantle convection causes volcanism, seafloor generation, and mountain building.

The release of water that takes place when the super-hydrated kaolinite breaks down could be an important part of the water cycle that causes volcanism along subduction zones.

Not exact matches

This statistical approach can't isolate a cause, but the team points out plenty of possibilities: continental drift, intense volcanism, climate change and sea level rise.

Auroras are caused by streams of charged particles like electrons that come from various origins such as solar winds, the planetary ionosphere, and moon volcanism.

This seething volcanism is thought to be caused by the massive tides wrought by nearby Jupiter: The push and pull heats and liquefies the mantle of little Io, no bigger than Earth's moon.

«We therefore have proof that the species disappeared during an ice age caused by the activity of the first volcanism in the Siberian Traps,» added Urs Schaltegger.

Repeated pulses of volcanism at the end of the Permian may have led to several periods of irradiation that sterilized the forests, causing a catastrophic breakdown of food webs, the researchers say — an indirect but effective way to kill.

Many scientists believe the extinction was caused by an asteroid impact; some think regional volcanism was to blame, and others suspect it was due to a combination of the two.

While they are causing short - term destruction, volcanoes also release carbon dioxide that yields long - term greenhouse - effect warming.The last big pulse of flood - basalt volcanism built the Columbia River plateau about 17 million years ago.

«We find that the end - Cretaceous mass extinction was caused by a combination of the volcanism and meteorite impact, delivering a theoretical «one - two punch,»» said Petersen, first author of a paper scheduled for online publication July 5 in the journal Nature Communications.

«This is the strongest evidence from fossils that the main driver of this extinction event was the after - effects of a huge asteroid impact, rather than a slower decline caused by natural changes to the climate or by severe volcanism stressing global environments.»

Since most craters are round, some believed that this formation could not have resulted from an impact and must have been caused by widespread volcanism.

Cataclysms, whether the asteroid that ended the dinosaurs» reign or the volcanism that may have caused the Great Dying, drove the first five mass extinctions in Earth's history, in which 75 percent of more of the planet's life died out.

We now have the best evidence yet that an enormous wave of volcanism, caused by several continents crashing together to form the even greater landmass known as Gondwana, was the reason for a sharp rise in global temperature.

Overall the results suggest that the Southern Oscillation exercises a consistently dominant influence on mean global temperature, with a maximum effect in the tropics, except for periods when equatorial volcanism causes ad hoc cooling.

It is challenging to see how volcanism could cause an ice age, since its cooling effects would have to be stronger than, and to outlast, its warming effects.

If the rockfall was caused by seismic activity, such as a marsquake, it could support views that Martian tectonics and volcanism are still active at the planet, Mustard added.

There are of course other causes for other changes that have occurred, including suspected asteroid impacts, changes in volcanism over the eons which can lead to the buildup or reduction of greenhouse gases over long time scales, etc..

Global warming brought on by increased atmospheric CO2 from volcanism is thought to be the cause of this extinction.

Thus, Victor the Troll, to contradict all that you wrote @ 221, «the dissipation of aerosols from any given eruption IS caused by a lack of volcanic activity,» and global temperatures CAN «rise above (the) level» «they would have been had the volcanoes not occurred» because the impact of previous volcanism would have also dissipated in the interval.

Concerning melting South American glaciers, from iceagenow.com: «I think it is caused by the El Nino phenomenon, which is caused by underwater volcanism, which is increasing due to the ice - age cycle.»

I don't care about whether runaway greenhouse warming or volcanism or a celestial impact was what caused the atmosphere to become so dominated by CO2, only that CO2is keeping Venus» surface hot.

Nobody can know if this volcanism conjecture is the correct explanation for the rise in atmospheric CO2 concentration but it is at least as likely as the conjecture that the anthropogenic emission is the cause.

The natural causes of climate variations that have time scales (century, decadal; e.g. Schwabe sunspot cycles, average solar output during the satellite measuring era,, ENSO / PDO / AMO and the rest of the alphabet soup of «oscillations», volcanism) either don't capture energy over multiple cycles — if I push a child on a swing, his average position doesn't move away from me — or are going in the wrong direction.

There is also a spurious drift over the whole period — possibly caused by anthropogenic water vapour and / or aerosols — and this period had frequent episodes of active volcanism.

Initially it is thought to be at least 50 % caused by solar variations and decreased volcanism worldwide but around 1970 it really began to take off and was due pretty much entirely to anthropogenic causes, the largest single factor being CO2 emissions.

Anthropogenic (human - caused) emissions have increased CO2 in the atmosphere and this in itself constitutes a forcing on climate like volcanism has in the past.

I'm thinking that the extensive volcanism might have caused some intial drops in sea level by dust shading the sun.

While scientists knew that volcanism caused climate change, new research suggests it goes the other way too Read More