Sentences with phrase «more glacier retreat»
The trend in mass balance is becoming more negative which is fueling more glacier retreat and thinning note figure at right.
https://www.nichols.edu/ Not exact matches
«There's no question that as glaciers retreat, more ground will become available for exploration and more discoveries could be made in that part of the world,» said Fronk.
«Greenland glaciers» varied vulnerability to melting: More accurate maps of bed topography reveal physical processes controlling retreat.»
Arctic sea ice dwindles and glaciers atop mountains in more temperate and even tropical lands retreat.
Thousands of marks on the Antarctic seafloor, caused by icebergs which broke free from glaciers more than ten thousand years ago, show how part of the Antarctic Ice Sheet retreated rapidly at the end of the last ice age as it balanced precariously on sloping ground and became unstable.
The retreat of the grounding line at these glaciers is more than five times that rate.
Before the 20th century, the fastest rate of glacier retreat reflected in the core was about 8,500 years ago, at a time when the Earth's position relative to the sun resulted in more summer sunlight in the Arctic.
Retreating Ice Glacier National Park, Montana Most of the ice that carved Glacier National Park's ridges and valleys melted more than 10,000 years ago, but by the time fur trappers ventured into the area in the 1800s, new glaciers had formed.
The underwater faces of the different glaciers retreated by between 0.7 and 3.9 metres each day, representing 20 times more ice than melts off the top of the glacier.
And she describes sobering trends: The projection that Switzerland will lose more than half of its small glaciers in the next 25 years; the substantial retreat of glaciers from the Antarctic, Patagonia, the Himalayas, Greenland and the Arctic; the disappearance of iconic glaciers in Glacier National Park, Montana, or reduction to chunks of ice that no longer move (by definition, a glacier must be massive enough to move).
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.
This means that, even though the glacier is flowing towards the coast and carrying more ice into the ocean, its calving front is actually retreating.
If they begin to melt, however — particularly as they're exposed to warmer ocean water — the shelves become thinner and the grounding line begins to retreat backward, causing the glacier to become less stable and making the ice shelf more likely to break.
A downward slope, for instance, might cause the glacier to retreat more quickly, while ridges or other topographical features might help to slow or halt the backward motion.
Like frozen levees, the retreating glaciers pin back more stable parts of the Greenland - size ice sheet.
News headlines about record - breaking temperatures, disappearing summer sea - ice and retreating Greenland glaciers frequently remind us that the Arctic is warming more rapidly than any other place on Earth.
Analysis of the data reveals that 87 % of glaciers have retreated (click on the image for a more detailed figure) and that the change from advance to retreat has occurred progressively with latitude.
Losing half its volume and retreating more than 1.5 kms, the shrinking glacier has left a moonscape of rocky moraines in its wake.
«We're seeing more tidewater glaciers retreat,» said glaciologist and team member Fabian Walter of the Scripps Institution of Oceanography, in La Jolla, Calif. «As they retreat, they thin, and that increases the likelihood that they'll come afloat.»
Global warming will also mean more forest fires; hurricanes hitting cities that are at present too far north of the equator to be affected by them; tropical diseases spreading beyond their present zones; the extinction of species unable to adapt to warmer temperatures; retreating glaciers and melting polar icecaps; and rising seas inundating coastal areas.
Thwaites, meanwhile, also continues to rank among of the fastest - shrinking glaciers, and has seen its grounding line retreat rate increase slightly compared to the earlier period, which Konrad said «should emphasize once more that this glacier is under threat.»
In Patagonia, analysis of glacier area and length changes shows that recession is widespread (90.2 % have retreated since 1870), is more rapid in smaller land - terminating glaciers, and that rates of recession are accelerating.
As a general matter, yes, but AIUI the increasing height (depth) of the ice face is the key factor for accelerating retreat of these glaciers since it creates more surface area for the warm water to work on.
«There's a whole lot more to understand if we're going to use this mechanism to predict how far Thwaites glacier and the other glaciers are going to retreat,» he says.
More specifically, using digital scans of paper maps based on aerial imagery acquired by the U.S. Geological Survey, along with modern - day satellite imagery from a variety of platforms, the authors digitized a total of 49 maps and images from which they calculated changes in the terminus positions, ice speed, calving rates and ice front advance and retreat rates from 34 glaciers in this region over the period 1955 - 2015.
French Prime Minister Manuel Valls visited the Mer de Glace (the Sea of Ice) Friday on Mont Blanc, where the retreating glacier has been documented for more than a century, through water colors painted before the invention of the still camera, black - and - white photos depicting a then - modern steam locomotive chuffing alongside the ice and today's high - definition satellite photos.
-LSB-...] Moreover, this study highlights that modern glacier retreat on Kilimanjaro is much more complex than simply attributable to «global warming only», a finding that conforms with the general character of glacier retreat in the global tropics [Kaser, 1999]: a process driven by a complex combination of changes in several different climatic parameters [e.g., Kruss, 1983; Kruss and Hastenrath, 1987; Hastenrath and Kruss, 1992; Kaser and Georges, 1997; Wagnon et al., 2001; Kaser and Osmaston, 2002; Francou et al., 2003; Mölg et al., 2003], with humidity - related variables dominating this combination.
Similar conclusions can be made for more glaciers world - wide, where the 1940 - 1945 period shows the largest retreat.
In Europe, where there is abundant historical information (in the form of paintings, photographs, as well as more formal record - keeping), retreat has been virtually monotonic since the mid 19th century (see e.g. images of the glaciers at Chamonix).
The Heartland Institute's propagation of the notion that the Kilimanjaro glacier retreat has been proved to be due to deforestation is even more egregious.
To give another, more specific example, at a typical glacier on Mt. Baker, in Washington State, a summer temperature increase of 1 °C translates to a ~ 150 m increase in the altitude of the equilibrium line (the point where annual ice accumulation = annual loss), and a resulting ~ 2 km retreat of the glacier terminus.
I'd like to see someone study whether the 150 - year history of alpine glacial retreat tracks more closely with reduction of mature forest near glaciers than it does with atmospheric CO2 levels.
Given all the independent lines of evidence pointing to average surface warming over the last few decades (satellite measurements, ocean temperatures, sea - level rise, retreating glaciers, phenological changes, shifts in the ranges of temperature - sensitive species), it is highly implausible that it would lead to more than very minor refinements to the current overall picture.
The effects of glacier retreat would become evident during the dry season, particularly in the west where glacial melt is more important to the river systems.
Although retreating glaciers would provide more meltwater in the short term, the loss of glacier «insurance» could become problematic over the long term.
Now the glacier has retreated more than 400 meters, at a rate of about 10 meters every year.
The quote from the article: «Their models suggest that this would cause the glacier to uncontrollably retreat about 25 miles (40 kilometers) over the next several decades, potentially raising global sea levels by more than 0.4 inches (1 centimeter).»
«More sections of the glacier become thinner and float, meaning that the grounding line continues retreating, and so on,» Khazendar explained in the statement.
Warm ocean water plays a significant role in melting glacial ice from below, and a better mapping of Antarctica's and Greenland's landforms beneath the ice suggests that ocean melting of the glacier fronts may play a more significant role than previously thought as the ice sheets retreat (under a global warming scenario).
The loss of this ice should then lead to acceleration, developing more crevassing and glacier retreat.
We know that temperatures are rising; the sea level is rising too; sea ice is thinning; permafrost is melting; glaciers are in world - wide retreat; ElNino events are becoming more frequent, persistent and intense; and on and on.
The former vice president's movie — replete with the prospect of a flooded New York City, an inundated Florida, more and nastier hurricanes, worsening droughts, retreating glaciers and disappearing ice sheets — mostly got the science right, said all 19 climate scientists who had seen the movie or read the book and answered questions from The Associated Press.....
The physical evidence becomes more dramatic every year: forests retreating, animals moving north, glaciers melting, wildfire seasons getting longer, higher rates of droughts, floods, and storms — five times as many in the 2000s as in the 1970s.
As ice shelves collapse the glaciers behind them retreat more quickly, causing further sea - level rise.
Before the 20th century, the fastest rate of glacier retreat reflected in the core was about 8,500 years ago, at a time when the Earth's position relative to the sun resulted in more summer sunlight in the Arctic.
And remember, the satellite data are one small part of a vast amount of data that overwhelmingly show our planet is warming up: retreating glaciers, huge amounts of ice melting at both poles, the «death spiral» of arctic ice every year at the summer minimum over time, earlier annual starts of warm weather and later starts of cold weather, warming oceans, rising sea levels, ocean acidification, more extreme weather, changing weather patterns overall, earlier snow melts, and lower snow cover in the spring...
«Shift to the warm - phase PDO in 1977 initiated global warming and recession of glaciers that persisted until 1998» The World Glacier Monitoring Service has noted that the peak percentage of glaciers retreating is not in 1998 but in 2005 or 2006 at more than 95 % that is persisted alright.
As the glacier retreat was more extensive in the period ending 1200 it is likely the oceanic water levels were higher than around 1600, or than they are today.
When the Indian government issued a report in early November 2009 (Himalayan Glaciers, A state - of - art review of glacial studies, glacial retreat and climate change) that contradicted the claim, the questions became more persistent.
The New Scientist article, «Flooded Out — Retreating glaciers spell disaster for valley communities» was published on 5 June 1999 issue, more than two months after the Down to Earth article.