Stories
Slash Boxes
Comments

SoylentNews is people

posted by chromas on Saturday August 22 2020, @10:00PM   Printer-friendly
from the friend-or-floe? dept.

Sea level rise quickens as Greenland ice sheet sheds record amount:

Greenland's massive ice sheet saw a record net loss of 532 billion tonnes last year, raising red flags about accelerating sea level rise, according to new findings.

That is equivalent to an additional three million tonnes of water streaming into global oceans every day, or six Olympic pools every second.

Crumbling glaciers and torrents of melt-water slicing through Greenland's ice block—as thick as ten Eiffel Towers end-to-end—were the single biggest source of global sea level rise in 2019 and accounted for 40 percent of the total, researchers reported in the journal Communications Earth & Environment.

[...] "2019 and the four other record-loss years have all occurred in the last decade," lead author Ingo Sasgen, a glaciologist at the Helmholtze Centre for Polar and Marine Research in Germany, told AFP.

The ice sheet is now tracking the worst-case global warming scenario of the UN's climate science advisory panel, the IPCC, noted Andrew Shepherd, director of the Centre for Polar Observation and Modelling at the University of Leeds.

[...] Until 2000, Greenland's [runoff ...] was compensated by fresh snowfall.

[...] In 2019, the ice sheet lost a total of 1.13 trillion tonnes, about 45 percent from glaciers sliding into the sea, and 55 percent from melted ice, said Sasgen. It gained about 600 billion tonnes through precipitation.

A study in the same journal last week concluded that the Greenland's ice sheet has passed a "tipping point", and is now doomed to disintegrate, though on what time scale is unknown.

Journal References:
Ingo Sasgen, Bert Wouters, Alex S. Gardner, et al. Return to rapid ice loss in Greenland and record loss in 2019 detected by the GRACE-FO satellites [open], Communications Earth & Environment (DOI: 10.1038/s43247-020-0010-1)

Michalea D. King, Ian M. Howat, Salvatore G. Candela, et al. Dynamic ice loss from the Greenland Ice Sheet driven by sustained glacier retreat [open], Communications Earth & Environment (DOI: 10.1038/s43247-020-0001-2)


Original Submission

 
This discussion has been archived. No new comments can be posted.
Display Options Threshold/Breakthrough Mark All as Read Mark All as Unread
The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.
  • (Score: 0, Disagree) by Anonymous Coward on Sunday August 23 2020, @02:32AM (3 children)

    by Anonymous Coward on Sunday August 23 2020, @02:32AM (#1040624)

    3 degrees? Wait for the micronova that turns the moon red, melting the surface to glass that happens every 15k years as found by the apollo missions. Then 18 hrs later the dust shell will hit the earth and chaos ensues.

    3 degrees over a hundred years is hilarious to be concerned about.

    Starting Score:    0  points
    Moderation   0  
       Disagree=1, Total=1
    Extra 'Disagree' Modifier   0  

    Total Score:   0  
  • (Score: 0) by Anonymous Coward on Sunday August 23 2020, @04:32AM (2 children)

    by Anonymous Coward on Sunday August 23 2020, @04:32AM (#1040668)

    Wow, found the conspuracy googler. Melting surface to glass every 15k years? Try thinking that through crazy buddy.

    Sun activity is a worry, but so far it is not the cause.

    • (Score: 0) by Anonymous Coward on Sunday August 23 2020, @04:44AM (1 child)

      by Anonymous Coward on Sunday August 23 2020, @04:44AM (#1040672)

      Apollo 11 Observations of a Remarkable Glazing Phenomenon on the Lunar Surface.
      T. Gold. Science. New Series, Vol. 165, No. 3900 (Sep. 26, 1969), pp. 1345-1349. 10.1126/science.165.3900.1345
      http://science.sciencemag.org/content/165/3900/1345 [sciencemag.org]

      Melted glass from a cosmic impact 12,900 years ago
      Ted E. Bunch, et al. Proceedings of the National Academy of Sciences Jul 2012, 109 (28) E1903-E1912; DOI: 10.1073/pnas.1204453109
      https://www.pnas.org/content/109/28/E1903 [pnas.org]

      • (Score: 0) by Anonymous Coward on Monday August 24 2020, @04:00AM

        by Anonymous Coward on Monday August 24 2020, @04:00AM (#1041035)

        An example of cherry picked facts applied out of context to something completely tangential. Then the obligatory conclusion drawn based on zero logic and applied in an attempt to discredit properly applied research and study.

        This is basis of just about every conspiracy theory out there.