The rapid melting is reshaping the coastal areas of Greenland and may change the human and animal ecosystems in the country’s coastal areas.
New research published in Journal of Geophysical Research: Earth Surface A study on October 27 found that the ice retreat in Greenland changed the way glaciers flow and where they fall into the sea. The researchers write that these changes may affect the future ice loss of Greenland.
Recent studies show that the annual loss of ice in Greenland is 500 gigatons, which is more than the amount of ice that can be replenished by new snowfall. Today’s annual ice loss has increased by 1
This new study, led by Twila Moon, a research scientist at the National Ice and Snow Data Center, breaks down these changes in more detail.
Moon and her colleagues combined two types of data from satellite imagery: how fast the ice sheet is moving and where the glacier ends on the downhill. When the glacier retreats, its end will not reach the trough as it used to.
They first discovered that glacier retreat has now become the norm in Greenland. The researchers wrote in the paper that in the past ten years, 89% of glaciers have basically receded. Almost no one has improved.
However, this reshaping of glaciers has transformed into various changes in glacier movement. Researchers have found that some glaciers are accelerating and flow faster to the sea. The flow of others is slower. In a few years to ten years, a glacier can perform these two functions at the same time, depending on the surrounding terrain.
A glacier is a glacier, so its flow depends not only on the rate of melting of the glacier, but also on the material below it.
For example, the Kjer and Hayes glaciers in northwest Greenland accelerated at their main sea estuary from the 1990s to 2010, but the ice estuary of other nearby oceans has slowed down. In one case, the southward part of one of the exits accelerated and then decelerated again.
Researchers have seen evidence of narrowing of ice channels, rerouting of meltwater paths, and even slowing of new ice, so glaciers are trapped in place, more like lakes than rivers.
All these local changes may be very important to predict how quickly Greenland’s ice will disappear in the future. These changes are also likely to affect how and where nutrients enter the water, the relative position of open fjords and ice, and where fresh water is available.
Research co-author Alex Gardner, a research scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California, said: “As the Arctic Ocean and the atmosphere warm, we can clearly see the speed of ice flowing into the ocean faster and the ice margins shrinking. “A statement.
“However, when we look closely, due to the differences in the characteristics of the bedrock and the seawater underneath the glacier at the front of the glacier, as well as the differences in melt water runoff, we can see the complexity of individual glacier reactions. Understanding the complexity of individual glacier reactions is important for improving The prediction of ice sheet changes and the associated sea level rise that will reach our shores is critical.”
This article was originally published by Live Science. Read the original article here.