.gov: Antarctic NOT melting

Discussion in 'Environmental' started by andy, Oct 22, 2008.

  1. litesong

    litesong litesong

    Ocean temperatures at the grounding line of Thwait's Glacier is measured.
    https://www.nytimes.com/2020/01/29/climate/thwaites-glacier-melting-antarctica.html
    More details from the article:
    The researchers, working on the Thwaites Glacier, recorded water temperatures at the base of the ice of more than 2 degrees Celsius, or 3.6 degrees Fahrenheit, above the normal freezing point. Critically, the measurements were taken at the glacier’s grounding line, the area where it transitions from resting wholly on bedrock to spreading out on the sea as ice shelves.
    Studies have forecast its total collapse in a century and also in a few decades. The presence of warm water in the grounding line may support estimates at the faster range.
    That is significant because the Thwaites, along with the Pine Island Glacier and a number of smaller glaciers, acts as a brake on part of the much larger West Antarctic Ice Sheet. Together, the two bigger glaciers are currently holding back ice that, if melted, would raise the world’s oceans by more than a meter, or about four feet, over centuries, an amount that would put many coastal cities underwater.

    “Warm waters in this part of the world, as remote as they may seem, should serve as a warning to all of us about the potential dire changes to the planet brought about by climate change,” said David Holland, a lead researcher on the expedition and director of New York University’s Environmental Fluid Dynamics Laboratory.
     
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  2. litesong

    litesong litesong

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  3. NeilBlanchard

    NeilBlanchard Well-Known Member

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  4. litesong

    litesong litesong

    Warmest day in Antarctica...... followed by another warmest Antarctic day, today........:

    20.75degC = 69.35degF.
    In conjunction with the warmest global January ever, man-made global warming just keeps warming. Ah, yeah..... January 2020 made it the 421st consecutive month over, the 20th century average temperature. All this heat, despite the Total Solar Irradiation being low for the last 13 or 14 years.
    ////////
    Further information:
    https://www.usatoday.com/story/news...st-had-its-hottest-january-record/4753438002/
    From the article:
    The planet's four warmest Januaries have occurred since 2016, and the 10 warmest Januaries have all occurred since 2002, NOAA said.
    Warmer temperatures mean melting snow and ice. The extent of Arctic sea ice was 5.3 percent below the average from 1981-2010, and Antarctic sea ice was 9.8 percent below the average.
    .....warmth itself is that it occurred without any assistance from an official El Niño event, Weather Underground meteorologist Robert Henson said. El Niño, a natural warming of Pacific Ocean water temperatures, also tends to produce warmer global temperatures.
    Looking ahead, NOAA scientists said that 2020 is also "very likely to rank among the five warmest years on record."
    ////////
    Last month to be below the 20th century average was some time in 1985, I think. Its good to know that the Antarctic isn't melting...... NOT!
     
    Last edited: Feb 16, 2020
    NeilBlanchard likes this.
  5. litesong

    litesong litesong

    An Antarctic iceberg the size of Seattle, just got lopped off the Pine Island Glacier:
    https://www.cbsnews.com/news/satell...an-seattle-break-away-from-antarctic-glacier/

    If we live long enough, we might see other icebergs busting off the Pine Island Glacier, as already has been seen.... & vast glacier Ice Sheet back-ups behind the Thwaites, speeding up.... as predicted.
    Of course, such predictions do NOT come from man-made global warming deniers.
     
    Last edited: Feb 15, 2020
    NeilBlanchard likes this.
  6. litesong

    litesong litesong

    Nasa photos show Antarctic melt during "heat wave":
    https://www.npr.org/2020/02/21/808187601/-antarctica-melts-nasa-says-showing-effects-of-record-heat
    From the article:
    Twitter
    [​IMG]



    Satellite images show the effects of a prolonged warm spell on Eagle Island, in the far north of the Antarctic Peninsula, NASA says. An inch of snowpack melted in just one day, the agency says. The blue areas in snow on the right are ponds of melted water.

    NASA
    Discussing the NASA images Friday, (Alexandra) Isern says, "....it's surprising to see such a rapid and dramatic shrinkage of snow and ice.You see those sort of things in Greenland and in the Arctic more often than you see them in the Antarctic," Isern says.
     
    Last edited: Feb 22, 2020
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  7. litesong

    litesong litesong

    Finally..... a good piece of global warming news, hopefully. Antarctic ice walls are their own best protection from AGW generated increasing heat.
    https://www.sciencedaily.com/releases/2020/02/200227114501.htm
    From the article:
    More knowledge has now been obtained from studying the measurement data collected from instruments that Anna Wåhlin and her researcher colleagues placed in the ocean around the Getz glacier in West Antarctica.

    The ice's edge blocks warm seawater

    Gertz has a floating section that is approximately 300 to 800 metres thick, beneath which there is seawater that connects to the ocean beyond. The glacier culminates in a vertical edge, a wall of ice that continues 300-400 metres down into the ocean. Warm seawater flows beneath this edge, towards the continent and the deeper ice further south.

    "Studying the measurement data from the instruments, we found that the ocean currents are blocked by the ice edge. This limits the extent to which the warm water can reach the continent. We have long been stumped in our attempts to establish a clear link between the transport of warm water up on the continental shelf and melting glaciers.

    Now, we understand that only a small amount of the current can make its way beneath the glacier. This means that around two-thirds of the thermal energy that travels up towards the continental shelf from the deep sea never reaches the ice."
    ///////////
    That is all to the good, that two-thirds of AGW generated energy does not reach ice. However, that still leaves the remaining two-thirds of AGW generated energy to unravel the environment in other ways.
    Yeah, good news is nice. But, that still leaves other bad news to be discovered about excess AGW generated energy.
     
    Last edited: Mar 1, 2020
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  8. litesong

    litesong litesong

    With the continuing Antarctic warming & ice melt, this article delineates, what was thought to be a land spur peninsula, but now is revealed as an island, separate from Antarctic mainlands. Named Sif Island after a Norse goddess, it is about 1150 feet long.
    https://www.livescience.com/uncharted-island-discovered-antarctica.html

    Appears the title of this thread is wrong, started by a man-made global warming denier?
     
    NeilBlanchard likes this.
  9. litesong

    litesong litesong

    Here's an analysis of the warmest recorded days of Antarctica that occurred this past January:
    https://www.uow.edu.au/media/2020/a...ntarctica-recorded-a-2075c-day-last-month.php
     

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