So, I posed this question to our guides in Patagonia in the Torres del
Paine park in Chile. The mountains there are 4000ish feet high which is
more than a kilometer, call it 1.5km. They told us the mountains were
under a km of ice, so that makes that the ice was 2.5ish km thick (above
current ground level, would have been a lot higher when the sea level
was lower because of the snow/ice had a lot of water locked up), call it
7-8000 ft thick, could have been quite a bit more. That ice, except for
the Great Southern Ice Sheet up in the mountains, is gone and the
climate/weather there is sorta like Colorado, warm in summer, cold in
winter.
The guides were going on about climate change and global warming, so I
asked why 2km of ice melted starting 10,000 years ago or whenever --
there were no power plants or SUVs at that time, and humans were just
starting to move over to the Americas, and certainly not way down to El
Fin del Mundo. They sorta locked up and dropped the subject and I
didn't press it.
Note that this expresses no opinion one way or the other on the subject
discussed below, but I have not seen an answer to this question. I am
wondering if global warming climate change disruption also caused the
ice age, but it certainly was not anthropogenic. Then if a big volcano
or two lets off, well then you got some pretty serious global cooling.
--R
On 2/23/15 4:52 PM, Andrew Strasfogel via Mercedes wrote:
Climate change may be to blame for frigid NortheastPublished: Monday,
February 23, 2015
Biting winds and frigid temperatures terrorizing the Northeast can be
linked to climate change, according to scientists at Rutgers and Wisconsin
universities.
Researchers found that since the 1990s, the North American jet stream that
pushes weather across the continent has become substantially more variable.
In their view, this variability can be linked to more rapid warming in the
Arctic in comparison to other parts of the world.
It can also help explain the lengthy cold snaps in the Northeast.
"The real story is how persistent the pattern has been. It's been this way
nearly continually since December 2013 ... warm in the west, cold in the
east," Jennifer Francis, Rutgers climate scientist, said in an article
in*Rutgers
Today*. "We think with the warming Arctic these types of very wavy
patterns, although probably not in the same locations, will happen more
often in the future."
The study <http://iopscience.iop.org/1748-9326/10/1/014005/article> was
published in *IOPscience* (Kurt Bresswein, Lehigh Valley *Express-Times*
<http://www.lehighvalleylive.com/breaking-news/index.ssf/2015/02/frigid_northeast_linked_to_war.html>,
Feb. 19). *-- MV*
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