Sentences with phrase «subglacial melting»

Untersee is a good model for Mars, he says, because it is supplied by subglacial melt — water that accumulates at the bottom of an ice pile — rather than from surface melting, which does not occur on Mars.

Not exact matches

As many surface melt - water lakes form each summer around the Greenland ice sheet, the possibility exists that similar subglacial lakes may be found elsewhere in Greenland.

«The location of the melting strengthens the idea that freshwater from the local subglacial drainage system is responsible for the evolving ice shelf features.»

Shifts in subglacial drainage patterns change the location of these basal channels, which could impact the ice shelf's stability by unevenly distributing the melting at the base.

The IceSat satellite, which Fricker uses to monitor subglacial lakes and which others use to monitor the sagging tops of melting glaciers, can function only 66 days per year due to a technical glitch.

«They show clearly that... the surface melt must have contributed to the rapid rise, the refilling of the subglacial lake,» Joe MacGregor, a glaciologist from the University of Texas, who was not involved in the research, said.

Priscu is looking forward to a similar U.S. effort called the Whillans Ice Stream Subglacial Access Research Drilling project next year, which will use a similar approach of melting a hole with hot water in order to reach the river - fed Whillans Ice Stream in West Antarctica.

Rutishauser said that the salinity of the Devon subglacial lake, which is four or five times saltier than seawater, is due to the melting of the basal ice from the surrounding rock formations.

I know that, such as East Antarctica, which ice sheet's thickness could reach several kilometers therefore huge pressure and geothermal flux results in melting, then the subglacial lakes and water channels.

Geothermal heat flux is an important factor in controlling basal ice temperatures, and subglacial volcanoes regularly cause localised melting in ice sheets.

Runoff from steep ice - cliffs, or through subglacial flow driven by water percolating through pores or fractures, will convert a high fraction of melting into ablation.

The data suggested that, like mountain glaciers, melt - induced glacier acceleration actually stops in years of intense melting once subglacial water erodes through the sediments and creates channels for water flow (Sundal et al. 2011).

Melt - induced speed - up of Greenland ice sheet offset by efficient subglacial drainage.

The edge of the Thwaites glacier [credit: NASA photograph by Jim Yungel] This BBC report seems unaware that a study in 2014 found that parts of the Thwaites Glacier are subject to melting due to subglacial volcanoes and other geothermal «hotspots».

sod hasn't been along to explain that electric bicycles stop polar ice melting, so to forestall him Lloyd et al (2015) A seismic transect across West Antarctica: Evidence for mantle thermal anomalies beneath the Bentley Subglacial Trench and the Marie Byrd Land Dome.

It is driven by poorly understood processes occurring at the ice - ocean interface, such as subglacial discharge into the ocean, turbulent plume dynamics, submarine melting, and iceberg calving.

The piece about the Greenland ice sheet had not a peep about the effect of geothermal activity under the ice sheet and the basal melting that is occurring driving the vigorous subglacial hydrology as outlined in Rogozhina et al, 2016.

Now, a new study finds that these subglacial volcanoes and other geothermal «hotspots» are contributing to the melting of Thwaites Glacier, a major river of ice that flows into Antarctica's Pine [continue reading...]

Geothermal activity can affect basal melt dynamics through increased lubrication and enhanced flow of subglacial streams.

Sole, A. J., D. W. F. Mair, P. W. Nienow, I. D. Bartholomew, M. A. King, M. J. Burke, and I. Joughin (2011), Seasonal speedup of a Greenland marine - terminating outlet glacier forced by surface melt - induced changes in subglacial hydrology, Journal Of Geophysical Research - Earth Surface, 116, 2011.