Snow melt: record melt: Greenland lost 586 billion tons of snow in 2019

Snow melt: record melt: Greenland lost 586 billion tons of snow in 2019

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A new study states that Greenland lost a record amount of snow during an extra-hot 2019, melting enough to dissolve California in more than four feet (1.25 m) of water.
Two years later, when the ice melted in summer, it was reduced, breaking all records, with 586 billion tons (532 billion metric tons) of ice melted last summer. This is over 140 trillion gallons (532 trillion liters) of water.
A study in Nature Communications Earth and Environment states that this is more than the annual average loss of 259 billion tonnes (235 billion metric tons) since 2003 and an old record of 511 billion tonnes (464 billion metric tons) in 2012. Is easily surpassed. The study showed that in the 20th century, Greenland had several years of receiving snow.
“Not only is Greenland’s ice sheet melting, but it is also melting at a faster and faster pace,” said the study’s lead author, Ingo Sassagen, a geologist at the Alfred Wegener Institute in Germany.
Last year’s Greenland melting increased the global sea level by 0.06 inches (1.5 mm). “In our world it’s a small thing but it’s huge, it’s amazing,” said study co-author Alex Gardner, a NASA ice scientist. He added that melting into other ice sheets and glaciers add more water as well as an ocean that heats up – and this gradually turns into rising sea levels, coastal flooding and other problems.
While normal ice melting records in Greenland go back to 1948, scientists have had accurate records since 2003 of how much ice melts as NASA satellites measure the gravity of ice sheets. Gardner said that placing ice on a scale and weighing it equals water.
As large as the melt last year, two years ago only averaged around 108 billion tons (98 billion metric tons). This suggests that there is a second factor called Greenland Blocking, which is either super-charged or moistens climate-related melting, Gardner said.
In summer, Greenland weather typically has two factors, Gardner said. Last year, Greenland blocked – a high pressure on Canada that shifts the northern jet stream – causing warm southerly air from the United States and Canada to flow into Greenland, forcing more melting.
In 2017 and 2018, cooler Arctic air flowed into Greenland from the open ocean without blocking Greenland, creating summer milestones.
This year, Greenland’s heat is not melting, close to normal for recent times, Ruth Motram, an ice scientist at the Danish Meteorological Institute, who was not part of Sasgain’s research.
Motram and many other outside scientists said that Sasagne’s calculations make sense. In her study this month in the International Journal of Climatology, she found similar results and also calculated that Greenland’s coastal areas have warmed on average 3 degrees (1.7 ° C) in summer since 1991.
New York University ice scientist David Holland said, “The fact is that the 2019 all-time record is very important.”


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