Sentences with word «supraglacial»

A decadal investigation of supraglacial lakes in West Greenland using a fully automatic detection and tracking algorithm.

We conclude that the ice sheet surface is efficiently drained under optimal conditions, that digital elevation models alone can not fully describe supraglacial drainage and its connection to subglacial systems, and that predicting outflow from climate models alone, without recognition of subglacial processes, may overestimate true meltwater release from the ice sheet.

Moulin discharges mapped inside ∼ 52 % of the source ice watershed for Isortoq, a major proglacial river, totaled ∼ 41 — 98 % of observed proglacial discharge, highlighting the importance of supraglacial river drainage to true outflow from the ice edge.

This led Luthje et al (2006) to conclude that the area covered by supraglacial lakes will remain constant even in a warmer climate.

The paper, «Efficient meltwater drainage through supraglacial streams and rivers on the southwest Greenland ice sheet,» was posted online by the Proceedings of the National Academy of Sciences on Monday.

We conclude that (i) the interior surface of the ice sheet can be efficiently drained under optimal conditions, (ii) that digital elevation models alone can not fully describe supraglacial drainage and its connection to subglacial systems, and (iii) that predicting outflow from climate models alone, without recognition of subglacial processes, may overestimate true meltwater export from the ice sheet to the ocean.

Mud and sediment from Subglacial Lake Whillans makes its first supraglacial appearance in January 2013.

Mindl, B., Anesio, A.M., Meirer, K., Hodson, A.J., Laybourn - Parry, J., Sommaruga, R., Sattler, B. (2007) Factors influencing bacterial dynamics along a transect from supraglacial runoff to proglacial lakes of a high Arctic glacier.

By better understanding these sudden drainages scientists hope to determine how supraglacial lakes will affect sea level rise as climate conditions shift in the future.

Greenland's many supraglacial lakes have been seen suddenly and mysteriously draining as climate change causes this region to warm, and now scientists have finally explained the mechanism behind this phenomenon.

Examination of recent rapid supraglacial (i.e. on the surface) lake drainage documented short term velocity changes due to such events around 10 %, but little significance to the annual flow of the large glaciers outlet glaciers (Das et.al, 2008).

We found that the volume of meltwater drained through this particular aquifer - crevasse field system is comparable to what comes out of a western Greenland supraglacial lake or river system.»

We use high - resolution WorldView - 1 / 2 satellite mapping and in situ measurements to characterize supraglacial water storage, drainage pattern, and discharge across 6,812 km2 of southwest Greenland in July 2012, after a record melt event.

But recent research shows that supraglacial rivers flowing over the ice sheet could swell oceans even more than massive icebergs or the drainage from Greenland's glacial lakes.

Low surface water storage (3.6 ± 0.9 cm), negligible impoundment by supraglacial lakes or topographic depressions, and high discharge to moulins (2.54 — 2.81 cm ⋅ d − 1) indicate that the surface drainage system conveyed its own storage volume every < 2 d to the bed.

Secondly, downwards percolation and flow of supraglacial and englacial systems.

Supraglacial lakes like this one (which is about 0.75 miles in diameter) dot the surface of the Greenland ice sheet during the summer seasonal melt.

We chose this particular lake because it wasn't far from one of the supraglacial river sites where we'd been working, and it was so massive — about a mile in diameter.

These glaciers are generally drained by supraglacial and englacial (within the glacier) meltwater channels, and meltwater channels at the base of the glacier are rare [3, 30].

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

TagsGreenland, Greenland Ice Sheet, Ice sheet, meltwater, Meltwater Lakes, Supraglacial Lakes, Glacial Lakes, lakes, glaciers, climate change, climate, global warming, Warming Temperatures, Drainage, ice loss, ice melt, Ice Flow

But now, a subsequent study is saying that while warming temperatures have created more of these supraglacial lakes, they are not likely to worsen Greenland's contribution to sea level rise.

(Ice lake or supraglacial lake.

Supraglacial lakes like this one (which is about 0.75 miles in diameter) dot the surface of the Greenland ice sheet during the summer seasonal melt.

Ryder Glacier is much different: Howat and others (2008) note that Ryder Glacier, North Greenland, accelerated by 300 % over a 7 week period following drainage of a supraglacial lake in 1995.

The role of supraglacial lakes in this has been a point of emphasis; Luthje et al, (2006) noted that the area covered by supraglacial lakes was independent of the summer melt rate, but controlled by topography.

Previous predictions of Greenland ice loss may have been greatly underestimated, as new research shows the region's «supraglacial» lakes could trigger faster ice melt in the future.

Greenland thawing: A scientist explores the remains of a supraglacial lake after it has drained Image courtesy of Sam Doyle