Re: Global warming hoax update
- From: FL Turbo <noemail@xxxxxxxxxx>
- Date: Fri, 04 May 2007 06:58:36 -0500
On Wed, 25 Apr 2007 08:01:29 -0500, "da pickle"
<jcpickels@(nospam)hotmail.com> wrote:
Anyone who states an opinion as scientific "truth" and that the opinion is
no longer worthy of question is preaching "dogma."
"Science" is DEMONSTRATED by people, and duplicatable.
Show me the evidence that duplicates and demonstrates that the actions of
humans caused the previous warming cycles of the Earth's climate as well as
the geological and biological changes that accompanied those cycles.
I don't know if anyone has posted this article, but it wouldn't hurt
to remind the True Believers of Global Warming that there just may be
something besides human activity that influences the climate.
Me?
I'm Agnostic.
http://environment.newscientist.com/channel/earth/mg19125691.100-global-warming-will-the-sun-come-to-our-rescue.html
Global warming: Will the Sun come to our rescue?
Exclusive
18 September 2006
Exclusive from New Scientist Print Edition.
Stuart Clark
It is known as the Little Ice Age. Bitter winters blighted much of the
northern hemisphere for decades in the second half of the 17th
century. The French army used frozen rivers as thoroughfares to invade
the Netherlands. New Yorkers walked from Manhattan to Staten Island
across the frozen harbour. Sea ice surrounded Iceland for miles and
the island's population halved. It wasn't the first time temperatures
had plunged: a couple of hundred years earlier, between 1420 and 1570,
a climatic downturn claimed the Viking colonies on Greenland, turning
them from fertile farmlands into arctic wastelands.
Could the sun have been to blame? We now know that, curiously, both
these mini ice ages coincided with prolonged lulls in the sun's
activity - the sunspots and dramatic flares that are driven by its
powerful magnetic field.
Now some astronomers are predicting that the sun is about to enter
another quiet period. With climate scientists warning that global
warming is approaching a tipping point, beyond which rapid and
possibly irreversible damage to our environment will be unavoidable, a
calm sun and a resultant cold snap might be exactly what we need to
give us breathing space to agree and enact pollution controls. "It
would certainly buy us some time," says Joanna Haigh, an atmospheric
physicist at Imperial College London.
----------------------------------------------------------------------
Heh.
I love this little aside.
Just when the article starts talking about solar activity determining
global climate, the author still is pining for new pollution controls
and worrying about that mythical "tipping point".
But nevermind.
Let's read on.
----------------------------------------------------------------------------
Global average temperatures have risen by about 0.6 °C in the past
century, and until recently almost all of this has been put down to
human activity. But that may not be the only factor at work. A growing
number of scientists believe that there are clear links between the
sun's activity and the temperature on Earth. While solar magnetic
activity cannot explain away global warming completely, it does seem
to have a significant impact. "A couple of years ago, I would not have
said that there was any evidence for solar activity driving
temperatures on Earth," says Paula Reimer, a palaeoclimate expert at
Queen's University, Belfast, in the UK. "Now I think there is fairly
convincing evidence."
What has won round Reimer and others is evidence linking climate to
sunspots. These blemishes on the sun's surface appear and fade over
days, weeks or months, depending on their size. More than a mere
curiosity, they are windows on the sun's mood. They are created by
contortions in the sun's magnetic field and their appearance foretells
massive solar eruptions that fling billions of tonnes of gas into
space. Fewer sunspots pop up when the sun is calm, and historically
these periods have coincided with mini ice ages.
The number of sunspots and solar magnetic activity in general normally
wax and wane in cycles lasting around 11 years, but every 200 years or
so, the sunspots all but disappear as solar activity slumps (see
"Field feedback"). For the past 50 years, on the other hand, the sun
has been particularly restless. "If you look back into the sun's past,
you find that we live in a period of abnormally high solar activity,"
says Nigel Weiss, a solar physicist at the University of Cambridge.
Fortunately, an indirect record of the sun's moods stretching back
thousands of years has been preserved on Earth in the concentrations
of rare isotopes locked into tree rings and ice cores. The story
begins way out beyond the orbit of Pluto, at the boundary of the sun's
magnetic field. While the sun is magnetically calm, its field extends
around 12 billion kilometres into space, but the field puffs up to 15
billion kilometres when the sun is active.
Cosmic rays - the high-energy particles from deep space that are
constantly hurtling towards us - are deflected by the field, so at
active times far fewer of them reach the Earth.
Hot link
So what does the sun's magnetic activity have to do with the climate
on Earth? To pin down the connection, Solanki and his colleagues
compared records of solar activity derived from tree rings with
meteorological records from 1856 to the present day. They found that
the temperature of the Earth's atmosphere changed in step with sunspot
numbers until 1970. This is the evidence that has done more than
anything else to convince climatologists to take the link seriously.
What's more, the most recent calculations by Solanki's team suggest
that the sunspot crash could lead to a cooling of the Earth's
atmosphere by 0.2 °C.
It might not sound much, but this temperature reversal would be as big
as the most optimistic estimate of the results of restricting
greenhouse-gas emissions until 2050 in line with the Kyoto protocol.
There is still a big puzzle, though. Astronomers and climate
scientists have always struggled to understand exactly how solar
activity could influence the temperature on Earth. Whatever the
variations in the sun's magnetic activity, the total energy it emits
changes by only 0.1 per cent - too small a change to have any direct
effect. As a result, the sun's role in climate change is highly
controversial. "People have been arguing over this for years," says
Reimer.
What other factor is at work? Important clues have emerged recently
from solar observatories, including the SOHO spacecraft operated by
NASA and the European Space Agency for the past 10 years. Although the
change in overall solar energy is small, measurements made by SOHO and
other solar observatories have revealed much greater variation in the
levels of ultraviolet radiation, which can peak at up to 100 times its
minimum level. "This means that there is scope for ultraviolet to have
a much larger effect on our atmosphere," says Haigh, who for the past
decade has been studying the impact of the sun's variability on
climate.
-------------------------------------------------------------------
---------
Evidently, the writer of the article does have at least some fear of
the Global Warmist's wrath for talking Heresy.
We have this disclaimer:
-------------------------------------------------------------------------------
There is a dangerous flip side to this coin. If global warming does
slow down or partially reverse with a sunspot crash, industrial
polluters and reluctant nations could use it as a justification for
turning their backs on pollution controls altogether, makingmatters
worse in the long run. There is no room for complacency, Svalgaard
warns: "If the Earth does cool during the next sunspot crash and we do
nothing, when the sun's magnetic activity returns, global warming will
return with a vengeance."
---------------------------------------------------------------------------------
God bless those people who yearn for a new, improved Kyoto Accord.
They are looking out for YOU.
.
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