Sentences with phrase «of volcanic»

Additional eruptions added from tree ring data reported in Table 2 of Briffa, KR, PD Jones, FH Schweingruber & TJ Osborn, 1998, Influence of volcanic eruptions on Northern hemisphere summer temperature over the past 600 years: Nature 393, 450 - 455.

Stenchikov, G., et al., 2002: Arctic Oscillation response to the 1991 Mount Pinatubo eruption: Effects of volcanic aerosols and ozone depletion.

At the bulleye's center is a region of what appears to be deposits of volcanic material, a sign that the center of the basin may have been covered by a volcanic flow sometime soon after the SPA impact.

Study Suggests Component of Volcanic Gas May Have Played a Significant Role in the Origins of Life on Earth - Scientists are reporting a possible answer to a longstanding question — how did the first amino acids form the first peptides?

Venus Express, ESA, JPL, NASA Larger thermal and radar, composite image of volcanic peak Idunn Mons.

Periods of volcanic activity are indicated.

Now that somebody has finally figured out a way to record the sound of volcanic thunder, future researchers will no doubt try to listen for it.

The team hopes that monitoring Io's surface annually will reveal the style of volcanic eruptions on the moon, constrain the composition of the magma, and accurately map the spatial distribution of the heat flow and potential variations over time.

Archeologists uncovered the tool underneath eight inches under a layer of volcanic ash that dates back to the eruption of Mount St. Helens 15,800 years ago.

Here, we show that the effective solar radiation (ESR), which includes the net solar radiation and the effects of volcanic eruption, has modulated this decadal ENSO - like oscillation.

Foster and Rahmstorf (2011) used a multiple linear regression approach to filter out the effects of volcanic and solar activity and ENSO.

The photochemical reaction of volcanic sulfur dioxide may not be the only method of creating a mass independent fractionation of sulfur.

What connects a series of volcanic eruptions and severe summer cooling with a century of pandemics, human migration and the rise and fall of civilisations?

These events may be due to slow hydrothermal weakening of the volcanic edifice and / or gravitational stresses within or just below the edifice.

Homo sapiens, by contrast, lived on the fringes beyond the range of the volcanic ash clouds.

Last summer, we found small pieces of volcanic glass in a cave that might be from an eruption that occurred in Indonesia nearly 70,000 years ago.

They discovered that this big shift towards more acidic oceans occurred during the same 10,000 years as the shift in amounts of volcanic carbon.

The research, published in the journal Scientific Reports, suggests that signals associated with tidal cycles could potentially provide advanced warning of certain types of volcanic eruptions.

Researchers uncovered a piece of volcanic rock dating back to the formation of Earth's early crust.

A new study has found geochemical clues near the summit of volcanic Mauna Kea that tell a story of ancient glacier formation, the influence of the most recent ice age, more frequent major storms in Hawaii, and the impact of a distant climatic event that changed much of the world.

Yes, there is a reason that scientists, and even governments, are interested in keeping track of volcanic and earthquake activity.

PROVIDENCE, R.I. [Brown University]-- Tiny beads of volcanic glass found on the lunar surface during the Apollo missions are a sign that fire fountain eruptions took place on the Moon's surface.

On the ground, information from aircraft with AVOID technology would be used to build an accurate image of the volcanic ash cloud using real time data.

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)

«While the precise implications of the CI eruption for cultures and livelihoods are best understood in the context of archaeological data sets,» write Black and colleagues, the results of their study quantitatively describe the magnitude and distribution of the volcanic cooling and acid deposition that ancient hominin communities experienced coincident with the final decline of the Neanderthals.

Because this crust contains considerable amounts of volcanic glass, understanding what changes the glass is important.

Based on the existing age model (24), we targeted a search for cryptotephra (subtle horizons of volcanic glass shards not visually apparent or detectable using remote sensing methods) on the depth interval of 20 — 40 m below lake floor (MBLF) in drill sites MAL05 - 1C and MAL05 - 2A in search of the YTT.

Instead, we «wet sifted,» placing a hunk of volcanic clay in a sieve and gently washing it in a sluice.

«Evidence of 2 billion years of volcanic activity on Mars: Meteorite found in Africa provides clues to evolution of the red planet.»

The meteorite, known as Northwest Africa 7635 and discovered in 2012, was found to be a type of volcanic rock called a shergottite.

Laser compositional image in 3D of a volcanic crystal.

They believe that their strategy will be a key step towards more accurate predictions of volcanic behavior.

Tom Lapen, a geology professor at the University of Houston and lead author of a paper published Feb. 1 in the journal Science Advances, said the findings offer new clues to how the planet evolved and insight into the history of volcanic activity on Mars.

«Satellites provide us with a unique «big picture» view of volcanic emissions that is difficult to obtain using other techniques,» Carn says.

The Ring of Fire — the ring of volcanic mountains along the rim of the Pacific — is an example of this type of collision.

A mysterious, centuries - long cool spell, dubbed the Little Ice Age, appears to have been caused by a series of volcanic eruptions and sustained by sea ice, a new study indicates.

Now Manning, Ludlow and their colleagues have found that eight out of nine documented revolts against the Ptolemaic rulers began within two years of a volcanic eruption — which would have disrupted rains.

«Ground - based measurements of volcanic gases that are more difficult to measure from space, such as carbon dioxide, are crucial.

An exceptional sulfate spike in the Greenland Ice Sheet Project Two (GISP2) ice core record, of 6 y duration, has been correlated to the YTT (16) despite an absence of volcanic material.

Now a study of volcanic rocks from early in life's evolutionary story shows that such eruptions coincided with a change in the climate from frigid chill to sweltering heat.

«The challenge is how to use these data efficiently and how to integrate them with models in order to have a deeper understanding of what occurs beneath the volcano and what drives the eruption so that we can determine near - real - time and accurate predictions of volcanic unrest.»

The number of volcanic glass shards (shards / gram of sediment) was counted in 10 - cm (gray bars) then 1 - cm (black bars) depth samples.

«First global maps of volcanic emissions use NASA satellite data.»

Volcanic activity at Mt. Songak was limited hydro volcanic activity out of which a great deal of volcanic ash was released while it is evident that Sangchang - ri was a dynamic active volcano out of which lava was spewed and then flowed down in all directions along the inland slope.

On Earth, the teams will use simulated lunar dirt, known as JSC - 1, made of volcanic ash.

Those glimpses of the surface revealed deposits of pyroclastic ash — the telltale signs of volcanic explosions — peppering the planet's surface.

«Cyclic change within magma reservoirs significantly affects the explosivity of volcanic eruptions.»

The pressure of the ice sheet constrains the lava flow, and glacial meltwater chills the erupting lava into fragments of volcanic glass, forming mounds and ridges with steep sides and flat tops.

After the researchers analyzed the inclusions — each just 15 to 40 microns wide, or one - sixth to two - fifths of the diameter of a human hair — they found the inclusions contained the entire range of minerals one would expect of a volcanic rock called basalt that originally formed at the planet's surface and then crystallized under extreme high pressures and temperatures.

The fossilised trunk obtained from Xinjiang was huge and perfectly preserved in glassy silica as a result of volcanic sediments, allowing us to observe every single cell of the plant,» Dr Berry continued.