Heat Wave Wallops Greenland

August 2, 2019

Houston Chronicle:

 The heat wave that smashed high temperature records in five European countries a week ago is now over Greenland, accelerating the melting of the island’s ice sheet and causing massive ice loss in the Arctic.

Greenland, the world’s largest island, is a semi-autonomous Danish territory between the Atlantic and Arctic oceans that has 82% of its surface covered in ice.

The area of the Greenland ice sheet that is showing indications of melt has been growing daily, and hit a record 56.5% for this year on Wednesday, said Ruth Mottram, a climate scientist with the Danish Meteorological Institute. She says that’s expected to expand and peak on Thursday before cooler temperatures slow the pace of the melt.

More than 10 billion tons (11 billion U.S. tons) of ice was lost to the oceans by surface melt on Wednesday alone, creating a net mass ice loss of some 197 billion tons (217 billion U.S. tons) from Greenland in July, she said.

“It looks like the peak will be today. But the long-term forecast is for continuing warm and sunny weather in Greenland, so that means the amount of the ice loss will continue,” she said Thursday in a telephone interview from Copenhagen.

The scope of Wednesday’s ice melt is a number difficult to grasp. To understand just how much ice is being lost, a mere 1 billion tons — or 1 gigaton — of ice loss is equivalent to about 400,000 Olympic-sized swimming pools, the Danish Meteorological Institute said . And 100 billion tons (110 billion U.S. tons) corresponds to a 0.28 mm (0.01 inch) rise in global sea levels.

Mottram said since June 1 — roughly the start of the ice-loss season — the Greenland ice sheet has lost 240 gigatons (240 billion metric tons) this year. That compares with 290 gigatons lost overall in the 2012 melt season, which usually goes through the end of August.

A June 2019 study by scientists in the U.S. and Denmark said melting ice in Greenland alone will add between 5 and 33 centimeters (2 to 13 inches) to rising global sea levels by the year 2100. If all the ice in Greenland melted — which would take centuries — the world’s oceans would rise by 7.2 meters (23 feet, 7 inches), the study found.

The current melting has been brought on by the arrival of the same warm air from North Africa and Spain that melted European cities and towns last week, setting national temperature records in Belgium, Germany, Luxembourg, the Netherlands and Britain.

11 Responses to “Heat Wave Wallops Greenland”

  1. Sir Charles Says:

    12 billion tons in 24 hours. That’s half a cubic kilometre every hour.

  2. rsmurf Says:

    This is why you keep the cooler closed in the summer!

  3. grindupbaker Says:

    OK but it’s the West Antarctic ice sheet (WAIS) that’s the sleeping giant for the next 200 years rather than Greenland. The WAIS will (must) start waking up in the next few decades.

    • rhymeswithgoalie Says:

      I expect by the time people start moving back from the coast due to the nearer-term melt (and storm surges) that more people will be willing to accept the inevitability of losing the WAIS.

  4. rhymeswithgoalie Says:

    Ugh! I went to that Laurie Garret Twitter thread and found “Steve Goddard” throwing his shït.

  5. redskylite Says:

    Some impressive photographs from Buzzfeed news.

    Photos Show Greenland’s Ice Sheet Turning Into Rivers In A “Major Melting Event”
    “This is not science fiction. It is the reality of climate change.”

    Greenland’s massive ice sheet is experiencing one of its biggest melting events on record, losing some 11 billion tons of ice in a 24-hour period after Earth’s hottest June and July in recorded history.

    https://www.buzzfeednews.com/article/gabrielsanchez/greenland-ice-melt-climate-change-warming-arctic


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