Sentences with phrase «increasing glacier retreat»

The north - south gradient of increasing glacier retreat was found to show a strong pattern with ocean temperatures, whereby water is cold in the north - west, and becomes progressively warmer at depths below 100m further south.

Not exact matches

A comparison of the moraine ages with nearby climate records indicates that Rwenzori glaciers expanded contemporaneously with regionally dry, cold conditions and retreated when air temperature increased.

The glacier is currently experiencing significant acceleration, thinning and retreat that is thought to be caused by «ocean - driven» melting; an increase in warm ocean water finding its way under the ice shelf.

Roughly 130,000 the Arctic enjoyed higher levels of solar radiation, leading to increased warming in the summer and the retreat of glaciers worldwide.

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.

A recent paper that demonstrates both retreat of subpolar mountain glaciers AND contemporaneous increase (not decrease) in wintertime precipitation (snow) is: Dyurgerov, M., 2003.

Although scientists have known for decades that Qori Kalis and the other Quelccaya glaciers are melting, new observations indicate that the rate of retreat is increasing, Professor Thompson said.

«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.»

There is certainly an increase in small - scale seismic activity when glaciers retreat and this is associated with isostaic rebound of the crust.

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.»

Since IPCC (2001) the cryosphere has undergone significant changes, such as the substantial retreat of arctic sea ice, especially in summer; the continued shrinking of mountain glaciers; the decrease in the extent of snow cover and seasonally frozen ground, particularly in spring; the earlier breakup of river and lake ice; and widespread thinning of antarctic ice shelves along the Amundsen Sea coast, indicating increased basal melting due to increased ocean heat fluxes in the cavities below the ice shelves.

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.

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.

If tropical glaciers continue to retreat despite an increase in precipitation, that will constitute a powerful case for the role of air temperature.

However, changes in the distribution of snowfall through the year, conceivably linked to increases in sea surface temperature, may have reduced the reflectivity of the glacier and played an even bigger role in forcing the retreat than changes in air temperature alone.

These include increases in heavy downpours, rising temperature and sea level, rapidly retreating glaciers, thawing permafrost, lengthening growing seasons, lengthening ice - free seasons in the ocean and on lakes and rivers, earlier snowmelt, and alterations in river flows.

We are getting alarmed over retreating glaciers (and some may be increasing).

There are several things that are well proven and simple to understand — for example, global termperature increase, sea level rise, polar ice cover, glacier retreat, and snow cover.

There is certainly an increase in small - scale seismic activity when glaciers retreat and this is associated with isostaic rebound of the crust.

Among these physical changes are increases in heavy downpours, rising temperature and sea level, rapidly retreating glaciers, thawing permafrost, lengthening growing seasons, lengthening ice - free seasons in the oceans and on lakes and rivers, earlier snowmelt and alterations in river flows.

During retreat phase, a tidewater glacier may retreat on the order of 1 - 2 km yr - 1 concurrent with dramatic increases in ice velocity...»

Equivalently, while the increase in terminus speed and the glaciers overall maximum speed may remain under a factor of five, as the terminus retreats farther inland where the speeds now are comparatively slow, the relative speedup is much greater (e.g., if the terminus retreated to M26 with a speed of 16 000 m yr − 1, this would represent a twelve-fold speedup).

The papers questioned everything from the relative role of natural mechanisms in changes to the climate system vis - à - vis increased CO2 concentrations, the allegedly «unprecedented» nature of modern climate phenomena such as warming, sea levels, glacier and sea ice retreat, and the efficacy and reliability of computer climate models for projecting future climate states.

Black carbon disrupts the South Asian monsoon (by altering the land - sea temperature gradient that drives the movement of moist air), helps melt the Greenland ice sheet (by increasing the solar energy the darkened ice absorbs), and accelerates the retreat of Himalayan glaciers.

I say «it appears that temperatures have been on the increase for at least 200 years» because NASA (as well as others) tells us that most glaciers in the Northern Hemisphere (at least the ones for which we some type of recording) have been retreating since the 1700s.

Data gleaned from 56 meteorological stations showed heat waves increasing from 1980 to 2009, a period marked by glacier retreats, steadily rising average temperature in the Indus delta and changes in temperature behaviour in summer and winter.

Of course, other reasons could exist for glacier retreat (e.g. Kilimanjaro's glacier retreat is apparently due not to increased temperatures but rather to decreased participation — and perhaps human clearing of trees has a role in that!)

The 2009 State of the Climate Report of the US National Oceanic and Atmospheric Administration (NOAA) tells us that climate change is real because of rising surface air temperatures since 1880 over land and the ocean, ocean acidification, sea level rise, glaciers melting, rising specific humidity, ocean heat content increasing, sea ice retreating, glaciers diminishing, Northern Hemisphere snow cover decreasing, and so many other lines of evidence.

27 January 2000: The Hektoria Glacier system is stable, but increased summer melting from climate warming in the 1980s and 1990s affected the glacier system in two ways: (1) a seasonal speedup from summer melt water percolating through the glacier ice to its base, and (2) initial retreat of the Larsen Ice Shelf due to the effects of melt ponds (downstream from this image).

During the 1984 - 1994 period glacier retreat rates have increased substantially due to negative annual balances (Pelto, 1993).

Peru's overall demand for electricity is projected to increase an average of 4 percent each year between 2002 and 2030.23 Continued glacier retreat could create critical conditions between 2015 and 2025, affecting water supplies needed for 60 percent of the population and for hydroelectricity generation.20, 10,22

Some argue that the combined increase in temperature and humidity is the major reason for accelerated tropical glacier retreat in the Andes toward the latter half of the twentieth century.2

Thus, glacier retreat leads to an increase in spring runoff and a decline in summer runoff.

Isostatic rebound in response to glacier retreat (unloading), increase in local salinity (i.e., δ18Osw), have been attributed to increased volcanic activity at the onset of Bølling — Allerød, are associated with the interval of intense volcanic activity, hinting at a interaction between climate and volcanism - enhanced short - term melting of glaciers, possibly via albedo changes from particle fallout on glacier surfaces.

No one disputes global temperatures have been rising since the little ice age low points of the mid-1650's, when these very same glaciers were increasing and crushing villages and churches — PREVIOUSLY retreating before that when these same churches and villages were built in mountain valleys, and when Andean children were being buried on dry ground in front of retreating Andean glaciers!

This can be affected by warming temperatures, but also by changes in snowfall, increases in solar radiation absorption due to a decrease in cloud cover, and increases in the water vapor content of air near the earth's surface.2, 14,15,16,17 In Cordillera Blanca, Peru, for example, one study of glacier retreat between 1930 and 1950 linked the retreat to a decline in cloud cover and precipitation.18

Glaciers with geographic factors increasing mean net annual accumulation have had less negative annual balances and slower glacier retreat rates (Pelto, 1993).

We can also observe the effects of global warming in worldwide glacier retreat, declining Arctic ice sheets, sea level rise, warming oceans, ocean acidification, and increased intensity of weather events.

Some possible effects of global warming are the inundation of low - lying islands due to rising sea levels, increased frequency of severe storms and the retreat of glaciers and icecaps.

The evidence includes accelerated sea level rise, rising global temperatures, warming oceans, declining Arctic ice sheet, worldwide glaciers retreat, increase of extreme weather events and ocean acidification.

GRENOBLE, France, Jan. 22 (UPI)-- Glaciers in South America's Andes have been retreating at an increasing rate, which could affect the region's water supply in the near future, scientists say.

THERE HAS BEEN A WARMING TREND FROM THE 70s THRU THE LATE 90s,... accompanied by other changes tied to a warming trend (record low arctic sea ice extent & thickness, retreating glaciers, retreating snow lines, warming ocean surface temps, increases in sea height, de-alkalinizing oceans).

Sea levels have been creeping up for the past 50 years, as glaciers retreat and icecaps melt, and as oceans expand with increasing atmospheric temperatures.

So if human activity were causing a dramatic increase in glacier retreat, that change should have happened in the last seventy years or so.

As these glaciers retreat due to global warming (see Chapter 1), river flows are increased in the short term, but the contribution of glacier melt will gradually decrease over the next few decades.

I'll quote myself as a reply: «temperature increases from X to X +1 and the glaciers retreat by Y. Next temperature increase from X +1 to X +2 results in a retreat smaller then Y and so on.»

In other words, scientists are not providing support or confirmation for the narrative that says the post-1940s anthropogenic CO2 emissions increase has coincided with unusual, unprecedented, or alarming glacier retreat.

E.g. temperature increases from X to X +1 and the glaciers retreat by Y. Next temperature increase from X +1 to X +2 results in a retreat smaller then Y and so on.

PIG already makes the largest contribution to sea - level rise of any single Antarctic glacier and the fact that its bed increases in depth upstream for more than 200 km means there is the possibility of runway retreat that would result in an even bigger contribution to sea level.»

Retreat at Thwaites Glacier, on the other hand — another of West Antarctica's monster glaciers, and currently the subject of greatest concern among Antarctic ice experts — has slightly increased in the last few years, from about 1,100 feet to nearly 1,400 feet per year.