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Author Topic: Alpine Glaciers  (Read 6056 times)

JimD

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Alpine Glaciers
« on: September 02, 2013, 06:28:48 PM »
The Swiss Alpine glaciers' response to the global '2 °C air temperature target'
Nadine Salzmann et al 2012 Environ. Res. Lett. 7 044001

This paper models the effect on a selection of 101 Swiss glaciers to a 2C temperature rise using the IPCC scenario A1B.  This covers 50% of the glaciated area and 75% of the ice volume in Switzerland.

Under this scenario, which seems very optimistic to me, their conclusion is the following:
....and all glaciers have fully adjusted to the new climate conditions at around 2150. By this time and relative to the year 2000, the glacierized area and volume are both decreased to about 35% and 20%, respectively, and glacier-based runoff is reduced by about 70%.


Under this scenario the runoff from the glaciers will start to plummet circa 2050 with resulting very adverse impacts on agriculture and fresh water supplies.  Making the assumption here that a 2C rise is a bit on the low side it would seem reasonable that this dramatic fall off in water supplies will actually arrive sooner than 2050.  And that the eventual disappearance of Swiss glaciers will occur before 2150.

http://iopscience.iop.org/1748-9326/7/4/044001/article

Edited to change topic title.
« Last Edit: June 01, 2014, 09:32:10 PM by Neven »
We do not err because truth is difficult to see. It is visible at a glance. We err because this is more comfortable. Alexander Solzhenitsyn

How is it conceivable that all our technological progress - our very civilization - is like the axe in the hand of the pathological criminal? Albert Einstein

Shared Humanity

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Re: Swiss Alpine Galaciers
« Reply #1 on: October 21, 2013, 03:59:03 PM »
The retreating glaciers and thawing alpine permafrost is causing a dramatic increase in rock slides and avalanches.

http://www.swissinfo.ch/eng/specials/climate_change/research/Are_the_Alps_becoming_unstuck.html?cid=33426

http://www.nytimes.com/2013/05/30/world/europe/in-swiss-alps-glacial-melting-unglues-mountains.html?pagewanted%253Dall

http://www.swissinfo.ch/eng/swiss_news/Climate_change_causes_more_rock_slides.html?cid=36759038

Watch Swiss Alps mountainside disappear


http://www.whaleoil.co.nz/2013/04/huge-avalancherock-slide-in-french-alps-earlier-this-week-olala-putain/#axzz2iMd8X8iS

JimD

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Re: Swiss Alpine Galaciers
« Reply #2 on: October 21, 2013, 09:37:58 PM »
Holy crap SH!  That is awesome.

On the last one it completely dammed up the stream at the bottom.  If they don't dig it out (pretty hard to do that) it will form a lake and eventually overflow and potentially cause some kind of flood in the future.
We do not err because truth is difficult to see. It is visible at a glance. We err because this is more comfortable. Alexander Solzhenitsyn

How is it conceivable that all our technological progress - our very civilization - is like the axe in the hand of the pathological criminal? Albert Einstein

JimD

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Re: Swiss Alpine Galaciers
« Reply #3 on: December 17, 2013, 04:40:25 PM »
Climate Progress article on warming in the Alps and impact on glaciers.

Alps Warming At Double The Average Global Rate, New Study Confirms....Brunot said that at lower lying elevations under 1,000 meters there’s been around 40 percent less snow over the last 50 years....


http://thinkprogress.org/climate/2013/12/16/3068161/alps-warming-rapidly-climate-change/
We do not err because truth is difficult to see. It is visible at a glance. We err because this is more comfortable. Alexander Solzhenitsyn

How is it conceivable that all our technological progress - our very civilization - is like the axe in the hand of the pathological criminal? Albert Einstein

Shared Humanity

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Re: Alpine Galaciers
« Reply #4 on: December 17, 2013, 05:15:10 PM »
The hills are alive with the sound of rock slides......

Swiss Alps mountainside disappear 300,000 cubic meters of rock to slide down a mountainside

nukefix

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Re: Alpine Galaciers
« Reply #5 on: June 01, 2014, 05:09:57 PM »
Global Land Ice Measurement from Space is a great resource on glaciers globally:

http://www.glims.org/

Clare

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NZ's Glaciers
« Reply #6 on: July 29, 2014, 09:34:08 PM »

cats

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Re: Alpine Glaciers
« Reply #7 on: August 16, 2014, 12:52:37 AM »
Thought others might find this interesting - http://people.ee.ethz.ch/~glacier/acam.html

Tor Bejnar

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Re: Alpine Glaciers
« Reply #8 on: August 18, 2014, 12:51:41 AM »
That 'The hills are alive with the sound of rock slides......' post (several posts back) happened in 2012:  http://blogs.agu.org/landslideblog/2012/05/22/the-remarkable-preonzo-landslide-in-switzerland-last-week/
I just noticed that December 17, 2013 post yesterday! :P
Arctic ice is healthy for children and other living things.

solartim27

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Re: Alpine Glaciers
« Reply #9 on: September 23, 2014, 05:48:47 PM »
x post from CA Drought:
Drought causes mudslide from Mt Shasta glacier
http://www.latimes.com/science/la-me-drought-glacier-melt-20140923-story.html
FNORD

BenB

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Re: Alpine Glaciers
« Reply #10 on: June 22, 2016, 12:35:06 PM »
The figures are out for length changes of Alpine glaciers in 2015:

http://glaciology.ethz.ch/messnetz/glacierlist.html

Summary:

92 retreated, 4 advanced and 3 were stationary.

Unterer Grindelwald lost another 450 metres, which means that it has lost a few kilometres in the past few years. Many smaller glaciers also lost significant proportions of their length, but the main story is that almost all of the glaciers monitored are retreating, year after year after year.

For reference, here are the summaries for past years:

2014: Retreating 85, advancing 5, stationary 4
2013: Retreating 70, advancing 12, stationary 6
2012: Retreating 95, advancing 1, stationary 2
2011: Retreating 96, advancing 1, stationary 2
2010: Retreating 88, advancing 3, stationary 5

Note: total numbers of glaciers vary because not quite all glaciers are measured each year. The pattern of far more glaciers retreating than advancing goes back many decades, although it has been particularly strong in the last 20 years.

skanky

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Re: Alpine Glaciers
« Reply #11 on: September 06, 2016, 12:11:45 PM »
More than 400 pieces of Alpine ice have been moved to a giant freezer - a first step in their journey to Antarctica.

The seemingly strange plan to send ice to the coldest place on Earth is part of a scientific mission to "rescue" some of the world's most endangered glacial ice.

Bubbles in old, deep glacial ice are frozen records of our past atmosphere.
Scientists say their purpose-built Antarctic ice bunker will keep these safe for future research.


"What we know for sure is that the ice will not be here in 50 or 100 years time - any glacier below 3,500m altitude will be gone by the end of the century," explained Jerome Chappellaz from France's National Centre for Scientific Research, one of the leaders of the project.

"[In the Alps], we're trying to recover ice cores from one of the glaciers that is in danger."
That glacier is at Col du Dome - just below the peak of Mont Blanc. It is one of two that the team has chosen to provide their frozen library with "reference ice" for regions where information on past climate and atmosphere is lacking.


More: http://www.bbc.co.uk/news/science-environment-37245768

Hefaistos

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Re: Alpine Glaciers
« Reply #12 on: May 02, 2017, 07:23:26 PM »
Desperation in the Alps, the snow season has 40 fewer days now, than in the 1970's. Ski resorts at both low and high altitudes saw snow arrive, on average, 12 days later and disappear 25 days earlier in 2015 than in 1970.
So, get the snow cannons out, let's increase the albedo a bit to save a few meters of glacier.
Don't know if the project's calculations are over-optimistic, "...calculations suggest that 4,000 snow machines running each year could grow the Morteratsch glacier by 800 meters within 20 years. The artificial-snow covering required at any given time is modest: a few centimeters thick and covering an area of about 0.5 sq. km at any given time. As the glacier thickens, the machines move to another patch of the glacier and start pumping out snow again."

https://qz.com/972621/to-save-its-famous-morteratsch-glacier-switzerland-is-testing-blowing-artificial-snow-to-prevent-glacier-melt/