Largest Tide Water Glacier In N. America Greatly Expanding

Discussion in 'Environment' started by Sinatra, Jun 3, 2009.

  1. Sinatra
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    Sinatra Senior Member

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    Alaska's enormous Hubbard Glacier is expanding at an incredible rate of 7 feet per day!

    This expansion actually is a threat to salmon runs in Disenchantment Bay.

    The USGS notes that this expansion is in contradiction to other glaciers in the world that are retreating. The USGS uses the Hubbard Glacier expansion as an example of "the calving glacial cycle in which glacier advance and retreat is more controlled by the mechanics of terminus calving than by climate fluctuations."

    USGS - Hubbard Glacier, Alaska

    Alaska's Hubbard Glacier is advancing at the rate of seven feet per day!

    [​IMG]
     
  2. k2skier
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    k2skier Senior Member

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    Yep, an anomaly. Quote from your link.

    This is in stark contrast with most glaciers, which have thinned and retreated during the last century.
     
  3. Sinatra
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    Sinatra Senior Member

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    And yet they maintain such current era retreating and advancing has little to do with climate changes - or lack thereof.

    And Alaskan glacier are not the only one...

    http://www.dailytech.com/Glaciers+in+Norway+Growing+Again/article13540.htm





    And the oft-repeated "melting polar ice caps" is also in dispute...

    http://wizbangblog.com/content/2009/05/16/news-flash-polar-ice-caps-not-melting.php

    http://blogs.telegraph.co.uk/james_..._nasty_shock_polar_ice_caps_blooming_freezing

    http://wattsupwiththat.com/2009/05/13/arctic-non-warming-since-1958/
     
    Last edited: Jun 3, 2009
  4. Old Rocks
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    Old Rocks Diamond Member

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    Despite the recent growth, most glaciers in the nation are still smaller than they were in 1982. However, Elvehøy says that the glaciers were even smaller during the 'Medieval Warm Period' of the Viking Era, prior to around the year 1350.

    DailyTech - Glaciers in Norway Growing Again
     
  5. Chris
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    Chris Gold Member

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    ROME, Italy (CNN) -- Melting glaciers in the Alps may prompt Italy and Switzerland to redraw their borders near the Matterhorn, according to parliamentary draft legislation being readied in Rome.

    Glaciers in the Alps near the Matterhorn are receding, forcing the border to be redrawn.

    Franco Narducci of Italy's opposition Democratic Party is preparing a bill to redefine the frontier with neighboring Switzerland, his office said Wednesday.

    Narducci is a member of the foreign affairs panel in Italy's lower Chamber of Deputies. Foreign Minister Franco Frattini has authorized the bill.

    Switzerland also has cooperated with Italy on the matter.

    The Italian Military Geographic Institute says climate change is responsible for the Alpine glaciers melting.

    Melting glaciers force Italy, Swiss to redraw border - CNN.com
     
  6. Chris
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    Chris Gold Member

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    Glaciers throughout Alaska are shrinking more and more rapidly, and scientists comparing old photos taken up to a century ago with digital images made during climbing expeditions today say the pictures provide the most dramatic evidence yet that global warming is real.

    And it's not only the glaciers reflecting the climate change. Everywhere on the treeless tundra north of the jagged slopes of Alaska's Brooks Range, explosive bursts of vegetation -- willows, alders, birch and many shrubs -- are thriving where permafrost once kept the tundra surface frozen in winter.

    Two geophysicists and a government geologist who spend much of their working lives exploring changes in the Arctic displayed dozens of photographs from the thousands in their files Thursday at the annual meeting of the American Geophysical Union in San Francisco.

    "You don't need science to prove the point," said Matt Nolan of the University of Alaska in Fairbanks. "This evidence is visual, and it's real.

    "All the glaciers in the Arctic National Wildlife Refuge are retreating from their most extended positions thousands of years ago, and the only scientific explanation for their retreat is a change in climate. There's no doubt at all, and the loss of glacial volume is accelerating."

    Bruce Molnia, a geologist with the U.S. Geological Survey, has gathered more than 200 glacier photos taken from the 1890s to the late 1970s and has visited more than 1,000 Alaskan glaciers in the past four years to photograph them from precisely the same locations and pointing in the same directions as the older ones.

    Where masses of ice were once surging down wide mountain passes into the sea, or were hanging from high and perilously steep faces, the surfaces in Molnia's images now stand bare. What remains from many of the retreating glaciers are stretches of open water or broad, snow-free layers of sediment.

    Shrinking glaciers evidence of global warming / Differences seen by looking at photos from 100 years ago
     
    Last edited: Jun 3, 2009
  7. Chris
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    Chris Gold Member

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  8. Sinatra
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    Sinatra Senior Member

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    Look at that astounding glacial growth!

    Global Warming??
     
  9. jreeves
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    jreeves Senior Member

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    Of course the glaciers are expanding, Obama is in office. Don't you remember he said he was going to heal our oceans?
     
  10. Chris
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    Chris Gold Member

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    The retreat of glaciers since 1850, worldwide and rapid, affects the availability of fresh water for irrigation and domestic use, mountain recreation, animals and plants that depend on glacier-melt, and in the longer term, the level of the oceans. Studied by glaciologists, the temporal coincidence of glacier retreat with the measured increase of atmospheric greenhouse gases is often cited as an evidentiary underpinning of anthropogenic (human-caused) global warming. Mid-latitude mountain ranges such as the Himalayas, Alps, Rocky Mountains, Cascade Range, and the southern Andes, as well as isolated tropical summits such as Mount Kilimanjaro in Africa, are showing some of the largest proportionate glacial loss.(IPCC)(Mölg)

    The Little Ice Age was a period from about 1550 to 1850 when the world experienced relatively cooler temperatures compared to the present. Subsequently, until about 1940, glaciers around the world retreated as the climate warmed substantially. Glacial retreat slowed and even reversed temporarily, in many cases, between 1950 and 1980 as a slight global cooling occurred. However, since 1980 a significant global warming has led to glacier retreat becoming increasingly rapid and ubiquitous, so much so that some glaciers have disappeared altogether, and the existence of a great number of the remaining glaciers of the world is threatened. In locations such as the Andes of South America and Himalayas in Asia, the demise of glaciers in these regions will have potential impact on water supplies. The retreat of mountain glaciers, notably in western North America, Asia, the Alps, Indonesia and Africa, and tropical and subtropical regions of South America, has been used to provide qualitative evidence for the rise in global temperatures since the late 19th century.(IPCC2) (NSIDC) The recent substantial retreat and an acceleration of the rate of retreat since 1995 of a number of key outlet glaciers of the Greenland and West Antarctic ice sheets, may foreshadow a rise in sea level, having a potentially dramatic effect on coastal regions worldwide.

    Retreat of glaciers since 1850 - Wikipedia, the free encyclopedia
     

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