They are right in that the ends of the ices ages were foillowed by increases in CO2 about 800-1000 years later.
And talking about the Little Ice Age:
#1
http://en.wikipedia.org/wiki/Ice_age#Causes_of_ice_ages
The causes of ice ages are not fully understood for both the large-scale ice age periods and the smaller ebb and flow of glacial–interglacial periods within an ice age.
Solar variation refers here to changes in the amount of
total solar radiation and its spectral distribution
Apart from solar brightness variations,
more subtle solar magnetic activity influences on climate from cosmic rays or the Sun's ultraviolet radiation cannot be excluded although confirmation is not at hand since physical models for such effects are still too poorly developed.
In my view:
This doesn’t take into account solar wind and major magnetic effects eg:
The 93 million mile long magnetic ropes that link the Sun and Earth seem to be a major conduit for this energy. That together with the solar wind whizzing past the planet at a million miles an hour being affected by these ropes towards the magnetosphere. That's my understanding of a possible mechanism that could affect our climate.
#2
http://en.wikipedia.org/wiki/Greenhouse_effect
See above (In my view)
#3
http://en.wikipedia.org/wiki/Climate_sensitivity
See above (In my view) and this from Christopher Monckton of Brenchley on the topic: “Even if temperature had risen above natural variability, the recent solar Grand Maximum may have been chiefly responsible. Even if the sun were not chiefly to blame for the past half-century’s warming, the IPCC has not demonstrated that, since CO2 occupies only one-ten-thousandth part more of the atmosphere that it did in 1750, it has contributed more than a small fraction of the warming. Even if carbon dioxide were chiefly responsible for the warming that ceased in 1998 and may not resume until 2015, the distinctive, projected fingerprint of anthropogenic “greenhouse-gas” warming is entirely absent from the observed record”
#4
http://www.skepticalscience.com/co2-lags-temperature.htm
“When the Earth comes out of an ice age,
the warming is not initiated by CO2 but by changes in the Earth's orbit”. I think this may be only part of the answer See above (In my view)
From the first link on “Causes of Ice Ages” The causes of ice ages are not fully understood for both the large-scale ice age periods and the smaller ebb and flow of glacial–interglacial periods within an ice age
#5
http://www.skepticalscience.com/co2-temperature-correlation.htm
“The UNEP and the IPCC like to speak about correlation between “global temperatures and CO2”, but
they never speak about correlation between solar activity and global temperatures because, they say, the Sun's activity has a negligible influence on Earth's climate – as if the planet were receiving heat from other more important sources!”
http://www.mitosyfraudes.org/Calen/correlaEng.html
#6
http://www.skepticalscience.com/Visual-depictions-of-CO2-levels-and-CO2-emissions.html
Excellent videos I enjoyed them. Not ignoring the physics of GHG regarding C02. but many are saying that it trails the warming, by some 800 years, not driving the warming.
#7
http://www.skepticalscience.com/news.php?n=143
“it varies over a 11 year cycle”
This is misleading, the total sunspot cycle is over 22 years.
Also they are only measuring total solar irradiance (TSI) (sunlight)
not the other Sun outputs! See above (In my view)
#8
http://www.agu.org/login/
Can’t read the full PDF without paying – pity.
So to sum up, the links you gave were very interesting but don’t move me from my view.
Some thing to think about the strong correlation between the Milankovitch_cycles
WP and the Ice Ages. if there was a stronger influence from inner solar dynamics, I think it would overwhelm the Milankovitch cycles.
http://en.wikipedia.org/wiki/Milankovitch_cycles
Yes, I see your point and agree. I notice there are quite a few problems for the Milankovitch cycles theory eg: 100,000-year problem, 400,000-year problem, Stage 5 problem etc…..
Effect exceeds cause
The effects of these variations are primarily believed to be due to variations in the intensity of solar radiation upon various parts of the globe.
Yes, maybe if we take into account the inner solar dynamics of the solar winds and magnetic effects rather than just the solar radiation.
Thanks Reality Check and Dancing David for making me spend time looking at these links.
Sorry for such a long post and I’m about to make it even longer stating my “understanding” and a piece on
magnetic ropes linking the Sun and Earth or as NASA calls them now Flux Transfer Event "I think there are two varieties of FTEs: active and passive."
The 93 million mile long magnetic ropes that link the Sun and Earth seem to be a major conduit for this energy. That together with the solar wind whizzing past the planet at a million miles an hour being affected by these ropes towards the magnetosphere. That's my understanding of a possible mechanism that could affect our climate.
Here's what NASA have found and say:
Magnetic Portals Connect Sun and Earth
Oct. 30, 2008: During the time it takes you to read this article, something will happen high overhead that until recently many scientists didn't believe in. A magnetic portal will open, linking Earth to the sun 93 million miles away. Tons of high-energy particles may flow through the opening before it closes again, around the time you reach the end of the page.
"It's called a flux transfer event or 'FTE,'" says space physicist David Sibeck of the Goddard Space Flight Center. "Ten years ago I was pretty sure they didn't exist, but now the evidence is incontrovertible."
(snip)
Now that Cluster and THEMIS have directly sampled FTEs, theorists can use those measurements to simulate FTEs in their computers and predict how they might behave. Space physicist Jimmy Raeder of the University of New Hampshire presented one such simulation at the Workshop. He told his colleagues that the cylindrical portals tend to form above Earth's equator and then roll over Earth's winter pole. In December, FTEs roll over the north pole; in July they roll over the south pole.
Sibeck believes this is happening twice as often as previously thought. "I think there are two varieties of FTEs: active and passive." Active FTEs are magnetic cylinders that allow particles to flow through rather easily; they are important conduits of energy for Earth's magnetosphere. Passive FTEs are magnetic cylinders that offer more resistance; their internal structure does not admit such an easy flow of particles and fields. (For experts: Active FTEs form at equatorial latitudes when the IMF tips south; passive FTEs form at higher latitudes when the IMF tips north.) Sibeck has calculated the properties of passive FTEs and he is encouraging his colleagues to hunt for signs of them in data from THEMIS and Cluster.
"Passive FTEs may not be very important, but until we know more about them we can't be sure."
There are many unanswered questions: Why do the portals form every 8 minutes? How do magnetic fields inside the cylinder twist and coil?
"We're doing some heavy thinking about this at the Workshop," says Sibeck.
Meanwhile, high above your head, a new portal is opening, connecting your planet to the sun.
http://science.nasa.gov/headlines/y2008/30oct_ftes.htm
Comments anyone?
