Retreating Greenland glacier is growing again

Posted: March 25, 2019 by oldbrew in climate, Natural Variation, News, Ocean dynamics, Temperature
Tags: , ,

Jakobshavn glacier, West Greenland [image credit: Wikipedia]


Without jumping to hasty conclusions, this is an interesting development not predicted by the IPCC’s supposed experts. Natural ocean/climate oscillations are implicated. Against assumptions, rising carbon dioxide levels cannot explain these latest observations.

A new NASA study finds a major Greenland glacier that was one of the fastest shrinking ice and snow masses on Earth is growing again, reports The GWPF.

The scientists were so shocked to find the change, Khazendar said: “At first we didn’t believe it.

“We had pretty much assumed that Jakobshavn would just keep going on as it had over the last 20 years.”

NASA research shows that Jakobshavn Glacier, which has been Greenland’s fastest-flowing and fastest-thinning glacier for the last 20 years, has made an unexpected about-face. Jakobshavn is now flowing more slowly, thickening, and advancing toward the ocean instead of retreating farther inland.

The glacier is still adding to global sea level rise – it continues to lose more ice to the ocean than it gains from snow accumulation – but at a slower rate.

The researchers conclude that the slowdown of this glacier, known in the Greenlandic language as Sermeq Kujalleq, occurred because an ocean current that brings water to the glacier’s ocean face grew much cooler in 2016. Water temperatures in the vicinity of the glacier are now colder than they have been since the mid-1980s.

In a study published today in Nature Geoscience, Ala Khazendar of NASA’s Jet Propulsion Laboratory in Pasadena, California, and colleagues report the change in Jakobshavn’s behavior and trace the source of the cooler water to the North Atlantic Ocean more than 600 miles (966 kilometers) south of the glacier.

The research is based on data from NASA’s Oceans Melting Greenland (OMG) mission and other observations.

Continued here.

Comments
  1. oldbrew says:

    ‘Box, who wasn’t part of the study, said Jakobshavn is “arguably the most important Greenland glacier because it discharges the most ice in the northern hemisphere. For all of Greenland, it is king.” ‘

    https://m.phys.org/news/2019-03-big-u-turn-key-greenland-glacier.html

    The whitewash of this evidence is already underway e.g….
    ‘While this is “good news” on a temporary basis, this is bad news on the long term’.

    Sounds like bluster.
    – – –
    NASA’s Oceans Melting Greenland (OMG) mission

    Mission’s not working out too well 😆

  2. Graeme No.3 says:

    “The glacier is still adding to global sea level rise – it continues to lose more ice to the ocean than it gains from snow accumulation – but at a slower rate”.
    I always thought that glaciers advanced when snow accumulation increased.
    And why is it advancing TOWARDS the ocean instead of retreating further INLAND if the water in the ocean has turned cooler?

  3. daveburton says:

    I wondered the same thing, Graeme No.3. If Jakobshavn is now “thickening, and advancing toward the ocean instead of retreating farther inland,” then how can it also still be losing ice? If it is lengthening and thickening, where’s it losing ice?

    Note that Jakobshavn has been retreating for a very long time. It was retreating rapidly when CO2 was under 290 ppmv:

  4. stpaulchuck says:

    “We had pretty much assumed …”
    can you say, “confirmation bias”?

  5. daveburton says:

    I found a newer version of that Jakobshavn map (updated through 2014):

  6. Stephen Richards says:

    They clearly don’t look at their satelite data even when Tony Heller points it out to them.

  7. oldbrew says:

    In 2015 NASA found the Antarctic wasn’t doing what they expected either…

    NASA Study: Mass Gains of Antarctic Ice Sheet Greater than Losses
    https://www.nasa.gov/feature/goddard/nasa-study-mass-gains-of-antarctic-ice-sheet-greater-than-losses

    Time to back off the ‘rapidly warming’ propaganda?

  8. Phoenix44 says:

    I do sometimes wonder if the intensified demands that we must act now are not just the result of politicisation but because scientists are nervous about a reversal of warming.

  9. Graeme No.3 says:

    Dave Burton: Thanks. Will file that with the map of Glacier Bay https://soundwaves.usgs.gov/2001/07/fieldworks2.htm.

  10. Gamecock says:

    This affects me how?

  11. DB says:

    More on the glacier two-step from January 2009. Richard Kerr writes:

    Galloping Glaciers of Greenland Have Reined Themselves In
    http://science.sciencemag.org/content/323/5913/458.1.summary
    “Things were looking bad around southeast Greenland a few years ago. There, the streams of ice flowing from the great ice sheet into the sea had begun speeding up in the late 1990s. Then, two of the biggest Greenland outlet glaciers really took off, and losses from the ice to the sea eventually doubled. Some climatologists speculated that global warming might have pushed Greenland past a tipping point into a scary new regime of wildly heightened ice loss and an ever-faster rise in sea level.

    “So much for Greenland ice’s Armageddon. ‘It has come to an end,’ glaciologist Tavi Murray of Swansea University in the United Kingdom said during a session at the meeting. ‘There seems to have been a synchronous switch-off’ of the speed-up, she said. Nearly everywhere around southeast Greenland, outlet glacier flows have returned to the levels of 2000. An increasingly warmer climate will no doubt eat away at the Greenland ice sheet for centuries, glaciologists say, but no one should be extrapolating the ice’s recent wild behavior into the future….

    “Taken together, the data show ‘there’s a pattern of speeding up to maximum velocity and then slowing down since 2005,’ Murray said. ‘It’s amazing; they sped up and slowed down together. They’re not in runaway acceleration. Something happened that has switched off’ the acceleration event of 2003 to 2005.”

  12. Edward Hurst says:

    Interesting how the glacier hardly changed between 1964 and 2001!

  13. daveburton says:

    Graeme No.3 wrote, “…with the map of Glacier Bay https://soundwaves.usgs.gov/2001/07/fieldworks2.htm

    That link doesn’t work for me. Did you mean this one?

    I converted that map of Glacier Bay to .png format, and put it on my server, here:

    This MRC article…
    http://archive2.mrc.org/articles/new-york-times-best-evidence-global-warming-melting-1700s
    includes this larger and slightly higher resolution version of the same Glacier Bay map:

    I found an even bigger, higher resolution version, and put it on my server, here:

    But they’re all pretty stale. Do you know where there’s a newer version?

  14. oldbrew says:

    NASA has a visualization here ending in 2006. Nothing much happened (?) between 1942 and 1997, in terms of net change, but it seems there was some backwards and forwards motion (see second image below).

    Jakobshavn Glacier Flow in the year 2000 and Calving Front Retreat from 2001 to 2006
    https://svs.gsfc.nasa.gov/3374

  15. oldbrew says:

    NASA has now come up with this. ‘Interrupted’ 😆

    Jakobshavn’s Interrupted Thinning Explained
    Released on March 25, 2019

    The deep water warms through most of the 1990s, but cools dramatically after 2015.

    https://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=4688&button=recent

  16. johnm33 says:

    There’s a more or less current zoomable image here. http://bslmagb.nerc-bas.ac.uk/iwsviewer/?image=DataPolarview/111_S1jpeg2000_201903/S1A_IW_GRDH_1SDH_20190322T095204_554C_N_1.8bit.jp2
    and a bed elevation image here https://www.researchgate.net/profile/Lu_An3/publication/315956178/figure/fig1/AS:614300364324868@1523472028236/a-Bed-elevation-above-mean-sea-level-of-Jakobshavn-Isbrae-JI-West-Greenland-and.png
    The glacier is flowing freely until it hits the cill below it’s present calving front, there’s so much ice sliding into the fjord it can’t retreat much before it refills, the whole fjord is full of saline water, tidally driven, back as far as the round feature, about the middle of the image.

  17. oldbrew says:

    We need to see what happens after 2015. As the report says:

    The researchers conclude that the slowdown of this glacier, known in the Greenlandic language as Sermeq Kujalleq, occurred because an ocean current that brings water to the glacier’s ocean face grew much cooler in 2016. Water temperatures in the vicinity of the glacier are now colder than they have been since the mid-1980s.

    That knocks the bottom out of greenhouse gas theory. Wasn’t the ‘missing heat’ supposed to be hiding in the oceans?

    It’s all nonsense and they are running out of places to hide.

  18. oldbrew says:

    Slow Learners
    Posted on March 28, 2019 by tonyheller

    Last spring, I pointed out that Greenland’s Jakobshavn Glacier has been growing since 2012, after 170 years of retreat.
    . . .
    Greenland’s second largest glacier, the Petermann Glacier, has also been growing since 2012.

    https://realclimatescience.com/2019/03/slow-learners/
    [includes graphics]

  19. craigm350 says:

    Reblogged this on WeatherAction News and commented:
    Interesting and as Oldbrew points out, Tony Heller has shown another Greenland glacier is growing:

    https://realclimatescience.com/2019/03/slow-learners/

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