The RoanokeSlant

This file is a US personal journal of commentary of examples of the Roanoke Times and Liberal Media Slant...... lbhagen@aol.com .......The Google Blogspot Cookie Notice is required for the EU!

Monday, September 28, 2015

 

Mother Nature At Work: Glaciers and Cows Calving

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Reflecting on some of Mother Nature’s realities about Basic Earth Science as a comparison to the man-made global warming AGW Alarmists materials so prevalent in today’s media.
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The AGW Alarmists love to show videos of land-based glaciers breaking off (calving) and crashing into the water.
A major example is: "CHASING ICE" captures largest glacier calving ever filmed
https://www.youtube.com/embed/hC3VTgIPoGU?rel=0
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No mention that calving is a totally natural process and happened during the Little Ice Age and is NOT unique to warming; in fact it is glacier retreat that is related to warming resulting from either the sun above or volcanoes below or both.
The video byline:  More Proof of Man-made Global Warming!  Really?
The dialogue goes on to overlay the calving of an advancing glacier to the retreating of a stagnant glacier, two very different natural processes.
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The old adage applies: things are either growing or they are dying.
It’s interesting that by definition a large mass of ice is labeled a glacier only if it is moving.
Glaciers move because they are incredibly heavy, they reside on sloping ground and their weight causes the ice on the bottom to melt into a layer of water thereby providing lubrication to facilitate the sliding.
This process is called: Regelation – I first saw this interesting (and counter-intuitive) demonstration in a class in 1956 (yes -- I am that old).
https://www.youtube.com/watch?v=gM3zP72-rJE
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Most glaciers slide downhill until they meet a body of water.  Typically, there is a significant cliff at that point.  The leading edge of the glacier cantilevers out over the ledge.  When the weight of the cantilevered portion exceeds the strength of the ice above the ledge the ice breaks off and the extended ice falls into the water often with great fanfare.
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Many of our current Northern Hemisphere glaciers grew during the Little Ice Age, following the Medieval Warm Period.  The “natural global warming” that ended the Little Ice Age circa 1750 stopped the growth of most glaciers in the Northern Hemisphere and caused them to start their melting and retreat.
An excellent documented example is Mendenhall Glacier in Juneau Alaska.
http://roanokeslant.blogspot.com/2015/08/obama-avoids-mendenhall-glaciers.html-
That warming process, that is still going on today, started well before there was any man-made CO2.  There has been less than one degree warming in the past 250 years and no significant temperature change in the past 18 years.
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Once glacier retreat starts, it typically accelerates because more snow and ice is not accumulating on top of it and more and more earth and rocks are exposed around it.  Those materials absorb the sun’s energy, warm-up, and accelerate the melting in contrast to glacial ice that reflects much of the sun’s energy.
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One can observe this process on a winter’s day when a small bare spot appears on a blacktop surface covered with light snow.  Accelerated melting occurs at the bare spot and it quickly expands outward compared to areas where there is no blacktop exposed.
(Unfortunately many people have never seen snow on a blacktop driveway!)
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Everyone should be skeptical of the claims being made about “man-made” global warming by AGW Alarmists and reflect on the facts that:
There is natural-global warming:  The Only Kind So Far!
http://roanokeslant.blogspot.com/2015/09/natural-global-warming-only-kind-so-far.html
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The Climate is Changing; The Climate Has Always Been Changing!
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Arctic Report
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The Arctic Ocean is warming up, icebergs are growing scarcer and in some places the seals are finding the water too hot, according to a report to the Commerce Department yesterday from Consulafft, at Bergen, Norway
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Reports from fishermen, seal hunters and explorers all point to a radical change in climate conditions and hitherto unheard-of temperatures in the Arctic zone.  Exploration expeditions report that scarcely any ice has been met as far north as 81 degrees 29 minutes.
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Soundings to a depth of 3,100 meters showed the gulf stream still very warm.  Great masses of ice have been replaced by moraines of earth and stones, the report continued, while at many points well known glaciers have entirely disappeared.
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Very few seals and no white fish are found in the eastern Arctic, while vast shoals of herring and smelts which have never before ventured so far north, are being encountered in the old seal fishing grounds.  Within a few years it is predicted that due to the ice melt the sea will rise and make most coastal cities uninhabitable.
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I must apologize; I neglected to mention that this report was from November 2, 1922, as reported by the AP and published in The Washington Post - 93 years ago – and article confirmed by Snopes.

http://www.snopes.com/politics/science/globalwarming1922.asp
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Another Little Ice Age:
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During the period 1940 to 1974 there was significant cooling in the Northern Hemisphere.  So much so that “concerned scientists” reached a “consensus”, that earth was entering another Little Ice Age and many people would face starvation and freezing.  This was widely publicized in both NewsWeek and Time magazines:
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Newsweek, April 28, 1975 Text Article:http://denisdutton.com/cooling_world.htm
Graphics:http://www.denisdutton.com/newsweek_coolingworld.pdf
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Time, June 24, 1974
Weather extremes around the globe and artic ice thickening and displacing wildlife southward.
http://www.time.com/time/magazine/article/0,9171,944914,00.html
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Mendenhall Glacier’s Retreat and Obama      September 11, 2015
https://dddusmma.wordpress.com/2015/09/11/mendenhall-glaciers-retreat-and-obama/
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Obama Avoids Mendenhall Glacier’s Lessons On “Natural” Global Warming
http://roanokeslant.blogspot.com/2015/08/obama-avoids-mendenhall-glaciers.html
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Obama’s Arctic Trip: Selling Economic Disaster For A Falsified Hypothesis
http://roanokeslant.blogspot.com/2015/09/obamas-arctic-trip-selling-economic.html
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The Complexity Of Earth’s Climate System Beyond The AGW Alarmists Comprehension Or Modeling
http://roanokeslant.blogspot.com/2015/09/the-complexity-of-earths-climate-system.html
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Alarmist Climate AGW “Scientists” In Conflict With Mother Nature
http://roanokeslant.blogspot.com/2015/05/alarmist-climate-agw-scientists-in.html
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Man-made Global Warming or Mother Nature's Normal Climate?
http://roanokeslant.blogspot.com/2015/01/man-made-global-warming-or-mother.html
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Global Warming Meets Mother Nature
http://roanokeslant.blogspot.com/2014/01/global-warming-meets-mother-nature.html
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Click for PowerPoint novice realistic view of Global Warming and Climate Change
http://www.roanokeslant.org/AGW-Skeptic2D/
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