Sentences with phrase «from glacial ice»

This is the period when data retrieved from glacial ice cores show the beginning of a growth in the atmospheric concentrations of several «greenhouse gases,» in particular CO2 and CH4.

Is that from glacial ice melt in Greenland and Arctic sea ice melt, with the melt caused by the El Niño?

And according to scientists who have 800,000 years of carbon records derived from glacial ice core samples, there is a strong link between earth temperatures and increased carbon dioxide levels in the atmosphere.

Complementary analyses of the surface mass balance of Greenland (Tedesco et al, 2011) also show that 2010 was a record year for melt area extent... Extrapolating these melt rates forward to 2050, «the cumulative loss could raise sea level by 15 cm by 2050 ″ for a total of 32 cm (adding in 8 cm from glacial ice caps and 9 cm from thermal expansion)- a number very close to the best estimate of Vermeer & Rahmstorf (2009), derived by linking the observed rate of sea level rise to the observed warming.

An artisan spirits producer, Alaska Distillery www.alaskadistillery.com, the first distillery of Alaska, uses only the purest water «harvested» from the glacial ice of Alaska's fabled Prince William Sound, and then painstakingly distills its spirits in small batches.

Not exact matches

Some of the ensuing hikes can be strenuous, aside from the inherent visual rewards, ship personnel greet trekkers at the end of the trudge with a choice of hot chocolate or a generous tumbler of Johnny Walker Red poured over 2,000 year - old glacial ice.

Scenic Caves Nature Adventure — A a self - guided trail of caves, caverns and crevasses carved millions of years ago by glacial ice, and savour the breathtaking lookouts from the highest point of the Niagara Escarpment, set in one of Canada's sixteen UNESCO biosphere reserves.

It cites numerous ways in which climate change is already threatening Europe, including glacial retreat in Europe's mountain systems, flooding from the melting ice - caps and increased water demand in the Mediterranea.

Radar measurements and models of Earthly glacial ice flows led researchers to conclude that the glaciers spotted on Mars from orbiters contain nearly 150 billion cubic meters of water.

And Libby himself, when he analyzed wood samples from trees once buried beneath glacial ice, documented that North America's last Ice Age ended approximately 11,000 years ago — not 25,000 years ago as previously believice, documented that North America's last Ice Age ended approximately 11,000 years ago — not 25,000 years ago as previously believIce Age ended approximately 11,000 years ago — not 25,000 years ago as previously believed.

The causes of the warming remain debated, but Liu and his team homed in on the melting glacial water that poured into oceans as the ice receded, paradoxically slowing the ocean current in the North Atlantic that keeps Europe from freezing over.

For instance, in the Tropics the temperature variations were three times as intense as today at the height of the last glacial, whereas the ice cores from Greenland indicate variations that were 70 times as intense.

A prehistoric human skeleton found on the Yucatán Peninsula is at least 13,000 years old and most likely dates from a glacial period at the end of the most recent ice age, the late Pleistocene.

In his mind, the site snuggled too closely to glacial deposits from the last ice age that lay atop the sloping Martian-esque hills.

One of the studies, led by University of Vermont geologist Paul Bierman, concludes that East Greenland — like the coastal scene shown in this image from near Tasiilaq — has been actively scoured by glacial ice for much of the last 7.5 million years.

Seismologists at Harvard and Columbia Universities first reported on their tracking of ice - quakes from glaciers in Greenland in 2003, and later showed this glacial earth - shaking was on the rise.

* Chinese glacial deposits show that three of the oldest and coldest ice ages in Earth's history date from 600 to 750 million years ago.

By combining GOCE's high - resolution measurements with information from Grace, scientists can now look at changes in ice mass in small glacial systems — offering even greater insight into the dynamics of Antarctica's different basins.

In 1998, while boring near the bottom of that long core, expecting to hit bedrock, the drillers brought up ice with crystals that were startlingly different from those usually found in glacial ice.

Apparently the drillers had hit meltwater from the top of Lake Vostok that had slowly refrozen and accreted onto the bottom of the overlying glacial ice sheet.

In contrast, in slightly wetter parts of Mongolia the largest glaciers did date from the ice age but reached their maximum lengths tens of thousands of years earlier in the glacial period rather than at its culmination, around 20,000 years ago, when glaciers around most of the planet peaked.

These forces occur on Earth in glacial ice as it flows due to gravity, and in space as icy satellite bodies, such as the moons of Jupiter and Saturn, respond to tidal forces from their parent bodies.

The sediment cores used in this study cover a period when the planet went through many climate cycles driven by variations in Earth's orbit, from extreme glacial periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like tglacial periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like tGlacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like today's.

Snow entraps dust from the atmosphere, and glacial ice contains information about the composition of the atmosphere from the past.»

«The meltwater feedback cycle under the ice shelf will only slow down once the shelf has collapsed, or no more glacial ice flows in from inland to take its place.

By 1900, increased emissions of soot could have triggered the loss of more than 15 m of ice from a glacier's surface; by 1930, the loss could have totaled 30 m or more — magnitudes and timing that can easily account for the Alpine glacial retreat, the scientists contend.

Patrick Crill, an American biogeochemist at Stockholm University, says ice core data from the past 800,000 years, covering about eight glacial and interglacial cycles, show atmospheric methane concentrations between 350 and 800 parts per billion in glacial and interglacial periods, respectively.

«The first step was to reconstruct the history of global mean temperatures for the last 784,000 years, using combined data from marine sediment cores, ice cores, and computer simulations covering the last eight glacial cycles,» said Friedrich, a post-doctoral researcher at IPRC.

«If you haven't had proximity to these glaciers, if you haven't thought about where water comes from, it would be easy to understate or underestimate the implications of glacial ice loss in a state that has predominantly a semi-desert climate and certainly by contemporary climate models is going to be pretty significantly impacted by climate change,» said Jacki Klancher, a professor of environmental science at Central Wyoming College.

And from glacial melt to the declining lake ice to changes in lake ecology, the results from Lake Hazen on Ellesmere Island in Canada are alarming.

And as if all that ice is not bad enough Carbon starvation in glacial trees recovered from the La Brea tar pits, southern California ``....

During the last glacial maximum, Wiens explained, the weight of the ice bent the Earth's crust, forcing the plastic rock in the upper layer of the Earth's mantle to flow away from the loaded region.

Readers can look for themselves at the Greenland ice core record and decide whether there's anything of consequence going on around 41K before present that looks any different from other glacial - interglacial cycles.You can look at the GISP data yourself by downloading

«the last glacial period is a good example of a large forcing (~ 7 W / m ^ 2 from ice sheets, greenhouse gases, dust and vegetation) giving a large temperature response (~ 5 ºC) and implying a sensitivity of about 3ºC (with substantial error bars).»

An early study suggested that these pingos formed on land during the glacial period, and are therefore relics from the ice age, just like the Arctic subsea permafrost.

As we have discussed previously, the last glacial period is a good example of a large forcing (~ 7 W / m2 from ice sheets, greenhouse gases, dust and vegetation) giving a large temperature response (~ 5 ºC) and implying a sensitivity of about 3ºC (with substantial error bars).

However, it's quite a different matter melting a long - lived massive ice sheet up to 1.5 km thick that covers over 70 % of the land surface (as happened at the end of the last glacial period), from melting isolated and much thinner ice caps / sheets that only cover about 11 % of the land surface (i.e. present - day).»

Terrestrial glacial geologists (such as ourselves) can gain information of past glacial behaviour from mapping and dating former ice sheet extents, and determining the rates at which they receded and thinned, [e.g., 16, 17 - 19].

As ice from the last glacial period retreated, plants, animals and people left behind a detailed record of their environment.

Another sign climate change hasn't stopped is that other climate indicators have continued with no signs of reversing, from Arctic sea ice and glacial retreat to rising seas.

For the most recent glacial periods ice cores provide climate proxies from their ice, and atmospheric samples from included bubbles of air.

Huybrechts, P., 2002: Sea - level changes at the LGM from ice - dynamics reconstructions of the Greenland and Antarctic ice sheets during the glacial cycles.

Glacial Isostatic Adjustment (GIA) occurs in response to retreating ice from the last glacial period, where around most of the world, land is subsiding at a fraction of a millimetre per year, compounding the problem of sea - leveGlacial Isostatic Adjustment (GIA) occurs in response to retreating ice from the last glacial period, where around most of the world, land is subsiding at a fraction of a millimetre per year, compounding the problem of sea - leveglacial period, where around most of the world, land is subsiding at a fraction of a millimetre per year, compounding the problem of sea - level rise.

Iron and sulfides could get into the water from rocks ground up when the glacial ice rubs against the bedrock of the continent.

The point of the mission, which involves researchers from the National Oceanography Centre (NOC), the British Antarctic Survey, Oxford University, and other UK - based institutions, is to determine how much glacial ice is drifting into the ocean, and to gain a better understanding of how water is mixing and behaving across the front of the shelf.

Development and comparison of layer - counted chronologies from the WAIS Divide and EDML ice cores, Antarctica, over the last glacial transition (10 - 15 ka BP).

An ultra-high resolution continuous record of methane variations during the last glacial - interglacial transition from the WAIS Divide ice core.

The ice field represents the remnant of an even bigger ice sheet from the last glacial period, and now feeds dozens of glaciers across the continent.

Fox Glacier Guiding will guide you onto the ice via a secret track through bush regenerating from previous glacial advances & share with you their knowledge of the geology of the area.

From boiling mud pots to glacial ice chunks on black sand beaches, these were the most incredible sights in Iceland.