Sentences with phrase «volcanic events»

I think with the exception of asteroid impacts and super volcanic events this is not true.

These observations may have a bearing on the coincidence of volcanic events with suspected meteor craters that were the subject of Matt Kaplan's recent article (5 June, p 38).

Such eruptions, which expel enormous quantities of magma, are the largest volcanic events on earth.

According to the Toba catastrophe theory, modern human evolution was affected by a recent, large volcanic event.

Over the course of time, this may have led to peaks in deep mantle melting and possibly to major volcanic events at the Earth's surface.

On the basis of the above two charts it seems that the global background trend in stratosphere and troposphere is not significantly affected by volcanic events or individual El Nino events.

In Iceland, a major volcanic event occurs every five years.

Other possibilities are the decomposition of organic matter in terrestrial settings, or the release of methane and carbon dioxide from deeply buried rocks during volcanic events.

It is considered one of the largest known volcanic events on Earth and it happened deep in the midst of the continental plate of Pangaea, in a part that is now Siberia.

While the stratosphere recovers from volcanic events quite quickly, the troposphere takes longer as some heat is transferred into the oceans, where cooling - down and heating back up take time.

«I was always under the impression that, in general, solar changes controlled long term changes in climate and volcanic events caused short term cooling.

«As it's not possible to always successfully predict volcanic events due to the lack of complete knowledge of the signals leading to catastrophes, these results are an important new finding and ultimately we hope they will contribute to our understanding of where and when the next volcanic eruption will be.»

By contrast, volcanic eruptions occurring in the 2,000 years before that can not be dated reliably, while the dates of even older volcanic events can be determined relatively accurately using the C14 method.

The eruption was the most deadly and economically destructive volcanic event in the history of the United States.

Unexplained volcanic events have been occurring on or near Heard Island, an uninhabited Australian possession in the southern Indian Ocean about 1600 kilometres from Antarctica.

To help solve this issue, two deep ice cores were drilled at the remote dome summits Dome Fuji (DF) and EPICA Dome C (EDC) in Antarctica and were subsequently synchronized in time by matching identical volcanic events.

Investigation of ash sediments from recent Mt. Pinatubo eruptions and other major volcanic events show a signature of mass independent isotope ratios of sulfur, while sediment from minor eruption does not.

The team determined that the basalts from Baffin Island, formed by a 60 - million - year - old eruption from the mantle hot - spot currently located beneath Iceland, and the Ontong - Java Plateau, which was formed by an enormous volcanic event about 120 million years ago, contain slightly more tungsten - 182 than other young volcanic rocks.

During the 2000 - 2001 school year, Jason XII will explore Hawaii and compare volcanic events on Earth with those throughout the solar system.

One of the most memorable discussions involves speculation about volcanic activity on the Canary Islands (where much of the novel's secondary narratives take place) and how a catastrophic volcanic event there could prove cataclysmic elsewhere, including on the other side of the Atlantic.

Organic matter from sites above and below ash fall layers also provides date ranges for important volcanic events that would otherwise be difficult to date.

Predictive assesments, so far in form of analogies, have been made: Because the solar motion in the next decades will be chaotic, lower and longer solar cycles (with irregular length), ocurrence of huge volcanic events and a decrease of global surface air temperature can be expected.

And don't say awe that can't happen... too many historical examples of that being proven wrong... We could spray reflecting debris in the upper atmosphere (like a volcano)... but how much does it take and what if something like a real volcanic event occurs... afterwards?

THE BIG PICTURE storm, earthquake & volcanic events come a lowerly 6th on the ladder of cause & effect & to study ocean temperature without finding out «why» under sea volcano eruptions happen isn't a sientific aproach in that book of mine.

Sudden shocks to the system such as volcanic events will take more time to be neutralised.

Volcanic events very close by would cause spikes, and today the concentration of CO2 in the north hemisphere is a few ppm higher, it takes about four years for CO2 produced largely in the north to cover the southern hemisphere.

Volcanic activity puts a great number of gaseous materials into the atmosphere so any warming as a result of severe volcanic events would be more likely a result of increasing overall atmospheric density rather than just being attributable to CO2 emissions.