Sentences with phrase «bottom of the glacier»

Where the ice meets the bedrock at the very bottom of the glacier, the meltwater is exposed to phosphorus - rich rocks that are pulverized by the moving glacier.

Derived from the French word for mill, these vertical wells drain surface melt water and can be dozens of metres deep or can extend down to the very bottom of a glacier.

By having upstream and downstream stations on each glacier, Scambos will see the dynamic nature of glacial response — the manner in which the bottom of the glacier accelerates before its higher reaches do, thus causing it to stretch, thin and welt up with crevasses the way Sjögren Glacier did.

If the ice at the bottom of a glacier melts, the point where it connects to the bedrock moves backward, farther inland, losing ice to the ocean in the process.

«It is pretty hard to get to the base of a glacier to see what's going on there, but the glacial polish can tell us about the composition of the gunk on the bottoms of glaciers and when the polish was formed.»

To study the advance and retreat of glaciers over nearly 10,000 years, scientists extracted sediment cores from the bottom of glacier - fed Kulusuk Lake in southeast Greenland.

Scientists can take sediment cores from the bottom of glacier - fed lakes to see how much silt and organic material settled over time, along with other indicators of a changing climate.

«Our observations provide a crucial piece of evidence to support that suspicion, as they directly reveal the intensity of ice melting at the bottom of the glaciers during that period,» Khazendar said.

Crevasses are a significant hazard on any glacierised terrain, and can extend all the way down to the bottom of the glacier.

I imagine the mechanics would be similar to those that allow meltwater above a certain depth to cut a channel clear to the bottom of a glacier.

«Our observations provide a crucial piece of evidence to support that suspicion, as they directly reveal the intensity of ice melting at the bottom of the glaciers during that period,» Ala Khazendar of NASA's Jet Propulsion Laboratory, Pasadena, California, who was involved in both the studies, said in a statement released Tuesday.

This includes the loss of reflectivity («albedo») caused by sunlight striking dark exposed rock rather than white ice, the lubricating effect of melt water penetrating to the bottom of glaciers, and many other «dynamical changes».

Scientists can take sediment cores from the bottom of a glacier - fed lake to see how much silt and organic material settled to the lake bottom over time, along with other indicators of a changing climate.

For example, when cryoconite holes melt deep enough to drain out the bottom of a glacier, their contents can eventually reach the ocean, flushing nutrients into the marine ecosystem.

Those warm currents melted the bottoms of any glaciers that terminated in the ocean.

If the ice at the bottom of a glacier melts, the point where it connects to the bedrock moves backward, farther inland, losing ice to the ocean in the process.

The water seeped down to lubricate the bottom of the glacier.

The bottom of the glacier is often melting and the age of the glacier is difficult to determine.

This flows to the bottom of the glaciers through holes, which helps glaciers retreat faster and dumps more water into the ocean.

Sudden water input caused by short term extremes, such as massive rain storms of the draining of a surface lake, however... allows [the meltwater] to pool and lubricate the bottom of the glaciers and accelerate ice loss.

In the past 20 years, the grounding line where the bottom of the glacier meets the ocean retreated by 25 kilometers, whereas over the previous 10,000 years it only moved back by 90 kilometers.

Sudden water input caused by short term extremes, such as massive rain storms or the draining of a surface lake, however... allows [the meltwater] to pool and lubricate the bottom of the glaciers and accelerate ice loss.