Sentences with phrase «when glacier melt»

This reduction in runoff is more evident during dry months when glacier melt is the major contribution to runoff (high confidence).

He agreed that overstatements about the impacts are rampant in the Himalayas as well, saying, «The idea that 1.4 billion people are going to be without water when the glaciers melt is just not the case.

When a glacier melts, it thins, weakens and speeds up, letting more landlocked ice drain into the ocean, causing sea levels to rise.

More to explore Scrumptious Science: Making Ice Cream in a Bag, from Scientific American High Seas: What Happens When the Glaciers Melt?

When the glaciers melt and disappear, this sediment is left behind, like inverted river channels.

When the glaciers melted before, methane...

Currently the same region is experiencing a period of drought, but the large agribusinesses continue to run vast farms by drawing on the Ogallala Aquifer - a huge, but not inexhaustible, water source created 15,000 years ago when the glaciers melted.

When glaciers melt, fresh water, enriched in light oxygen isotopes (oxygen 16), mixes with the bottom water.

What happens when a glacier melts away?

When the glaciers melted before, methane...

Three years ago, University College London professor Chronis Tzedakis had just explained the basic cycles of an ice age to an undergraduate geology class; how the Earth goes through periods of glaciation followed by warmer periods when glaciers melt.

Not exact matches

And even though these coastal glaciers have passed the point of no return, the researchers predict it's unlikely they'll melt entirely until 2100 — when that happens it's estimated that it will raise global sea levels by around 3.8 cm (1.5 inches).

Scientists from Rice University and Texas A&M University - Corpus Christi's Harte Research Institute for Gulf of Mexico Studies have discovered that Earth's sea level did not rise steadily but rather in sharp, punctuated bursts when the planet's glaciers melted during the period of global warming at the close of the last ice age.

There are ways to monitor when the dam of a glacial lake might break: Scientists track the lake's depth, the geological composition and geometry of its dam, and other factors, such as melting rate and steepness of adjacent glaciers.

So when the team returned to their flight paths five years later, they were surprised at how fast the coastal glaciers had melted.

Bands of darker ice with no bubbles indicated times when snow on the glacier had melted in past summers before re-freezing.

Scientists have a pretty good idea of how thermal expansion and melting mountain glaciers will play out over the long term, but when it comes to the ice sheets, «we have no idea,» Willis says.

When most people think of the physical effects of climate change, they picture melting glaciers, shrinking sea ice or flooded coastal towns (SN: 4/16/16, p. 22).

A key step forward came last year when scientists at Utrecht University in the Netherlands, using remote sensing equipment, found that snow and glacier melt is extremely important to the Indus and Brahmaputra basins, but less critical to others.

When cryoconite particles carve out a melt hole in a glacier, they create a new environment: a habitat where they and other organisms can reside.

When the climate warmed in the late 1800s, it triggered the retreat phase of the tidewater glacier cycle as warm ocean water melted the ice.

Roberts found that when warm water melts Totten from below, it causes the base of the glacier that's usually grounded on the seafloor to float.

So when wind pulls warm water up from down deep, the temperature difference experienced at the interface of the water and ice can effectively submerse the glacier in a hot bath, with some areas experiencing more than a 10-fold increase in melt rate.

Totten Glacier, the largest glacier in East Antarctica, is being melted from below by warm water that reaches the ice when winds over the ocean are strong — a cause for concern because the glacier holds more than 11 feet of sea level rise and acts as a plug that helps lock in the ice of the East Antarctic Ice Sheet.

The entire cave system flooded at the end of the last ice age, when melting glaciers raised sea levels.

But when the glacier retreats past that bulwark, it will collapse into the ocean; then seawater will intrude and melt channels into the ice sheet, setting the juggernaut in motion.

Glaciers may look tranquil and majestic, but when they start melting they can make a real racket.

Instead, the main source of the clamor occurs when bubbles disengage from the melting glacier and suddenly spring back into their original spherical shapes after thousands of years of being squeezed by the ice.

That's because the IPCC models only take into account temperature changes at the surface of glaciers, but not the rapid melting that occurs when glaciers calve and break up into the ocean, Rignot said.

Once people understand that sea - levels will continue to rise, will eventually make most major cities uninhabitable, and the glaciers which feed much or Asia's agriculture will disappear, marine life will face an acid catastrophe, and nobody can see how a net food deficit can be avoided, we all know that the political option of «just adapt to it when it happens» will melt away as fast as the glaciers.

The research published in Nature Communications found that in the past, when ocean temperatures around Antarctica became more layered - with a warm layer of water below a cold surface layer - ice sheets and glaciers melted much faster than when the cool and warm layers mixed more easily.

However, Roland tells us, the ice shelves can retard the flow of glaciers into the sea, and speed up glacier melt when they disappear.

The European Alps have been growing since the end of the last little Ice Age in 1850 when glaciers began shrinking as temperatures warmed, but the rate of uplift has accelerated in recent decades because global warming has sped up the rate of glacier melt, the researchers say.

Melting glaciers, intensifying storm systems, rising sea levels, and species in jeopardy — these are scary scenarios, especially when you're just eleven years old.

Dr. Dill stressed the importance of this study, «cave deposits formed in air within Belizean Blue Holes down to depths of over 400», could give us new and uncontaminated isotope dates on when the melting continental glaciers caused not only flooding of the Blue Hole, but also the continental margins all over the world.»

At a time when greenhouse gas emissions from human activities are at historically high levels and glaciers are melting, Purple poses the question of human responsibility.

Sooty air from coal burning triggered the initial melting of the mountain glaciers in the European Alps in the second half of the 19th Century when it caused the snow to turn grey and so reflect less sunlight back into space, scientists said.

When the soot absorbs the sunlight it warms and could increase the melting of the glacier.

Which leads me to another question — the melting glacial / Greenland / Antarctic ice water is depleted in CO2 (check out the bubbles in your ice cubes)-- how much additional CO2 is being sequestered by this runoff into the oceans, and what happens to CO2 increase when we run out of glaciers?

Glaciers start melting when northern hemisphere summer insolation increase; eventually northern hemisphere insolation decreases again.

On the other hand, this is a big maybe, soot and other pollution when it is in the air I am guessing could reduce the strength of sunlight that reaches the glacier and this possibly could reduce the melting.

Once people understand that sea - levels will continue to rise, will eventually make most major cities uninhabitable, and the glaciers which feed much or Asia's agriculture will disappear, marine life will face an acid catastrophe, and nobody can see how a net food deficit can be avoided, we all know that the political option of «just adapt to it when it happens» will melt away as fast as the glaciers.

When ice melts from the world's glaciers, antarctica and the arctic all that water evaporates and has to come down somewhere as rain.

The daytime glacier surface temperature typically has to be greater than the air temperature in order to close the energy budget; in consequence, melting can occur even when the air temperature remains below freezing.

When we discuss climate change, visual images pop into our head of melting glaciers, polar bears, drought, forest fires, and industrial smokestacks.

When the Chile quake happened, I thought perhaps serious glacier melt in the region may have contributed somewhat to the quake's intensity, and perhaps the same might be for Himalayan quakes.

The snow and ice in glaciers might melt when the energy addition into the glacier material is sufficient to supply the energy necessary to raise the temperature to the melting point plus the latent heat of melting.

Of course it would be nice to know exactly how and when we're going to really suffer — abrupt CC, runaway GW, mass extinction event, or just a linear ratcheting up of the same (floods, droughts, heatwaves, sea rise / land loss, disease spread, mega-storms, glacier melt, famines).

The Associated Press has put out an interesting interactive mapof climate change data, including the emission trends from countries in the northern hemisphere, graphs of the various indicators of global warming such as glacier melts and global temperatures, and the pledges that different countries have made when it comes to reducing greenhouse gas emissions.

This, when added to the contributions of the Antarctic, continental glacier, and Greenland melting should account for the discrepancy.