NASA study on hottest summers in Greenland churned out a new discovery and it’s worrying!
New Delhi: In addition to providing us with many ideas on how the universe works, the US NASA’s space agency has always warned us about potential hazards such as Earth’s buzzing asteroids, hurricanes and storms, and especially climate change.
With its global warming and climate change discourse in recent years, its rapidly growing effects have raised questions about the future’s habitability of the Earth.
Last month, NASA’s IceBridge mission has told us about the first pictures of a huge new crack in the huge Greenland Petermann Glacier, which send signals to worry about the glacier’s livelihood.
Now, NASA scientists have drawn attention to another concern still in Greenland. A study conducted in 2010 and 2012 – the hottest summers recorded Greenland – Ice rink on the glacier on the west coast of the island has not only melted faster than usual, glided towards the interior of the glacier in a Giant wave, such as a heater heats the slides of the plastic box.
The wave has been maintained for four months, the upstream ice continues to descend to replace the mass loss for at least four months.
This solitary wave is a new discovery that may increase the possible loss of ice in Greenland admits as the climate continues to heat up, causing an impact in the future rate of sea level rise.
The study was conducted by three scientists – including a leader of Indian origin who led the study – Jet Propulsion Laboratory of NASA in Pasadena, California, and was the first to accurately track the mass loss of a glacier Melting ice by horizontal movement of a GPS sensor.
Using data from a single GPS sensor on the Greenland Network (GNET), located at the bottom of the rock alongside Glacier Track, research has been published in the journal Geophysical Research Letters.
According to a NASA report Track is one of Greenland’s main selling points in the ocean, draining about 11 billion tonnes (gigatonnes) of ice per year in the 2000s – on the weight of 30 000 Empire State buildings. In the hot summer of 2012, however, it lost 6 million million additional masses in the form of a solitary wave. The melting process noted above can not explain weight loss.
The wave crossed the glacier that flows during the months of June to September at a rate of about 4 km (4 km) per month during the first three months, reaching 12 km in September. The amount of moving mass was 1.7 giga ton, roughly about half a giga ton per month. Glacier track generally flows at the rate of one or two miles (a few miles) per year.
The wave was not detected by usual methods for detecting Greenland ice loss, such as the degree of thinning of glaciers with airborne radar. “You could literally be there and you will not see any indication of the wave,” said scientist Eric Larour JPL, co-author of the new paper. “There would be no cracks or other unique surface features.”
The researchers observed the same wave pattern in GPS data for 2010, the second hottest recorded in Greenland. Although they do not quantify the exact size and speed of the wave in the year 2010, the GPS data movement patterns indicate that it must have been less than the 2012 wavelength, but similar in speed.