Sentences with phrase «by glaciers during»

Sometimes described as the «eighth wonder of the world», Milford Sound was carved by glaciers during the ice ages.

Described as the «eighth wonder of the world», Milford Sound was carved by glaciers during the ice ages.

This is because the campaign's seafloor survey revealed features under the ocean, such as troughs cut by glaciers during the last ice age, which must continue upstream under the glacial ice.

A boulder deposited by a glacier during the last ice age sits atop Cadillac Mountain in Acadia National Park, Maine.

Not exact matches

Reporting in the journal Nature, an international team of researchers led by British Antarctic Survey (BAS) explains that wind - driven incursions of warm water forced the retreat of glaciers in West Antarctica during the past 11,000 years.

During ice ages, which are mainly driven by rhythmic variations in Earth's orbit and spin that alter sunlight in the Northern Hemisphere, growing ice caps and glaciers trap so much frozen water on land that sea levels can drop a hundred meters or more.

Carved by growing glaciers during colder times, these seafloor valleys extend thousands of feet below Pine Island and Thwaites.

The granitic bedrock here was polished by glacier sliding during the Last Glacial Maximum.

Analyses carried out by an international group of researchers in the Andes (where more than 99 % of tropical glaciers are found) show that these glaciers expanded not only during cooling over Greenland (12,000 years ago) but even more so during a cold event in Antarctica (14,000 years ago).

The local diversity and unique geologic history (covered by neither glaciers nor oceans for the past 225 million years, the Ozarks provided refuge for migrating species during the Ice Age) explain the richness of the lichens here: some 600 named species, along with 30 recently discovered ones awaiting their official designation.

Massive phytoplankton (algae) blooms and suspended mineral particles released by glaciers occur during the Arctic spring and summer.

The glacier sped up by about 10 percent during that time, showing that the glacier's long - term movement is fairly oblivious to trickles at its underside.

After that heyday, the bears must have been split up into small, isolated populations — genetic bottlenecks — perhaps as they sought refuge on islands and other areas not covered by advancing glaciers during the most recent ice age.

Supraglacial (surface) water on a glacier is formed by the ice melting during the summer.

Zugspitzplatt is situated by the impressive Schneeferner glacier - Germany's largest glacier that came about during the «Little Ice Age» of the 19th century.

The topography for the city is known as «crag and tail» and was created during the ice age when receding glaciers scored across the land pushing soft soil aside but being split by harder crags of volcaninc rock.

During this experience the artist was profoundly inspired by the movements of ice viewed from the ship including melting glaciers and the icy expanses of the polar ice caps.

The rise in CO2 emissions due to the burning of fossil fuels from 1880 through the 1940's was not sufficient to have played a major role in the considerable global temperature rise that took place during that period — so if we want to presume that sea level rise is prompted by global temperature rise (along with concomitant melting of glaciers, etc.) then we can't really attribute very much of the rise in sea levels during that period to CO2.

For example, [Kruss 1983] has this to say about the Lewis glacier on Mt. Kenya: «A decrease in the annual precipitation on the order of 150 mm in the last quarter of the 19th century, followed by a secular air temperature rise of a few tenths of a degree centigrade during the first half of the 20th century, together with associated albedo and cloudiness variation, constitute the most likely cause of the Lewis Glacier wastage during the last 100 years.»

Francou B, Vuille M, Wagnon P, Mendoza J and Sicart J - E 2003: Tropical climate change recorded by a glacier in the central Andes during the last decades of the twentieth century: Chacaltaya, Bolivia, 16S.

During the record - setting wildfire season of 2012, Box was anxious to quickly get to Greenland to collect samples of the ice to see if soot from Colorado was landing on the glaciers, but by that time, traditional sources of science research funding were already allocated, so in his unorthodox, punk rock style, Box set out on his own and set up The Dark Snow Project to crowd - fund his research.

Local rivers fed by these glaciers are becoming seasonal rivers, generating conflict among the 2 million people who depend on them for water supplies during the dry season.

(05/13/2013) Glaciers in the Mount Everest region have shrunk by 13 percent and the snow - line has shifted 180 meters (590 feet) higher during the past 50 years, according to a study that will be presented this week at a conference organized by the American Geophysical Union.

The 12 — 21 cm higher sea level stand during the MWP is likely the highest sea level since the previous interglacial period 110,000 years ago, and was produced by an extended period of warming, allowing time for glaciers and thermal expansion to reach a climatic balance.

But the world was only about 4 °C to 7 °C cooler, on average, during the last ice age, when large parts of Europe and the United States were covered by glaciers.

In commenting on their findings, the three researchers write that «the large number of stable glacier termini and glacier advances is influenced by positive glacier mass balances in the central Karakoram during the last decade,» citing Gardelle et al. (2012, 2013) and Kaab et al. (2012), which they indicate is «induced by increasing winter precipitation and decreasing summer temperatures since the 1960s,» citing Archer and Fowler (2004), Williams and Ferrigno (2010), Bolch et al. (2012), Yao et al. (2012) and Bocchiola and Diolaiuti (2013).

By Sreeja VN: Sizzling underwater glacial ice, as it melts into warmer sea water, creates one of the loudest natural marine environments, and the air bubbles that pop during the process could help scientists measure the rate of glacier melt and track fast - changing polar environments.

Annual net balance on eight North Cascades glaciers during the 1984 - 1994 period has been determined by measurement, of total mass loss from firn and ice melt and, of residual snow depth at the end of the summer season.

Since the mid-1990s, Alaskan glaciers have been thinning by 1.8 meters a year, more than three times as fast as during the preceding 40 years.

To ascertain the annual balance of a glacier from a sparse network of observations is optimized by detailed mapping of mass balance across the glacier determined from a high - density measurement network during several years.

During the record - high temperature summer of 2003, some Swiss glaciers retreated by an unprecedented 150 meters.

All he can really say is what he has, that in his area of glaciers the temps were higher during the early Holocene by the fossil remains of trees which subsequent cooling killed off, but he has not shown that temps were subsequently never warmer until present — these fossil remains could well have been uncovered during such times as the lesser warming of the MWP but conditions there not conducive to re-establishment of trees before the next cooling period arrived.

«All he can really say is what he has, that in his area of glaciers the temps were higher during the early Holocene by the fossil remains of trees which subsequent cooling killed off, but he has not shown that temps were subsequently never warmer until present — these fossil remains could well have been uncovered during such times as the lesser warming of the MWP»

Carved by earlier advances of ice during colder periods, the troughs enable warm, salty water to reach the undersides of glaciers, fueling their increasingly rapid retreat.

This conclusion has subsequently been supported by an array of evidence that includes both additional large - scale surface temperature reconstructions and pronounced changes in a variety of local proxy indicators, such as melting on icecaps and the retreat of glaciers around the world, which in many cases appear to be unprecedented during at least the last 2000 years.

Many rivers draining glaciated regions, particularly in the Hindu Kush - Himalaya and the South - American Andes, are sustained by glacier melt during the summer season (Singh and Kumar, 1997; Mark and Seltzer, 2003; Singh, 2003; Barnett et al., 2005).

In many rivers fed by glaciers, there will be a «meltwater dividend» during some part of the 21st century, due to increasing rates of loss of glacier ice, but the continued shrinkage of the glaciers means that after several decades the total amount of meltwater that they yield will begin to decrease (medium confidence).

From 2000 to 2005, Kangerdlugssuaq glacier was the fastest - moving glacier on Greenland, retreating around eight to nine miles (13 to 14 kilometers) per year.2 The end (terminus) of the glacier not only retreated from the ocean but also thinned by more than 820 feet (250 meters) during that period.2

By studying rocky debris piled up during the Little Ice Age and then left behind as the glaciers retreated after 1750 the researchers have been able to chart their progress.

The observed recession of glaciers (Box 1.1) during the last century is larger than at any time over at least the last 5,000 years, is outside of the range of normal climate variability, and is probably induced by anthropogenic warming (Jansen et al., 2007).

May be you mean that strip bark is basically caused by extreme snow conditions and glacier advances occur during such times?

These areas of open water influence: (1) the land by allowing more ocean waves and more coastal erosion, (2) Greenland outlet glaciers by exposing the glacier fronts to warmer ocean waters, and (3) the atmosphere by providing a source of heat and moisture during autumn.

These were formed as moraine - dammed lakes and the glacier - lake area was estimated to have increased approximately by 2591 sq.meters during the 47 - year period.

Glaciers Sizzle, Squirt Bubbles When Melting To Create Loudest Marine Environment; These Sounds Could Help To Measure Ice Melt By Sreeja VN: Sizzling underwater glacial ice, as it melts into warmer sea water, creates one of the loudest natural marine environments, and the air bubbles that pop during the process could help scientists measure the rate of...

The glaciers atop Gondwana extended to at least 45 ° S latitude, similar to the latitude reached by Northern Hemisphere ice sheets during the Pleistocene.