Skip to comments.Sun's Fickle Heart May Leave Us Cold
Posted on 01/25/2007 4:40:59 PM PST by blam
Sun's fickle heart may leave us cold
25 January 2007
From New Scientist Print Edition.Stuart Clark
There's a dimmer switch inside the sun that causes its brightness to rise and fall on timescales of around 100,000 years - exactly the same period as between ice ages on Earth. So says a physicist who has created a computer model of our star's core.
Robert Ehrlich of George Mason University in Fairfax, Virginia, modelled the effect of temperature fluctuations in the sun's interior. According to the standard view, the temperature of the sun's core is held constant by the opposing pressures of gravity and nuclear fusion. However, Ehrlich believed that slight variations should be possible.
He took as his starting point the work of Attila Grandpierre of the Konkoly Observatory of the Hungarian Academy of Sciences. In 2005, Grandpierre and a collaborator, Gábor Ágoston, calculated that magnetic fields in the sun's core could produce small instabilities in the solar plasma. These instabilities would induce localised oscillations in temperature.
Ehrlich's model shows that whilst most of these oscillations cancel each other out, some reinforce one another and become long-lived temperature variations. The favoured frequencies allow the sun's core temperature to oscillate around its average temperature of 13.6 million kelvin in cycles lasting either 100,000 or 41,000 years. Ehrlich says that random interactions within the sun's magnetic field could flip the fluctuations from one cycle length to the other.
These two timescales are instantly recognisable to anyone familiar with Earth's ice ages: for the past million years, ice ages have occurred roughly every 100,000 years. Before that, they occurred roughly every 41,000 years.
Most scientists believe that the ice ages are the result of subtle changes in Earth's orbit, known as the Milankovitch cycles.
(Excerpt) Read more at environment.newscientist.com ...
Time to toss global warming on the trash heap and worry about the new ice age...Again.
Let me be the first....it'll be Bush's fault eventually, just to discredit Algore's global warming fanaticism. The lengths W will go to!
< / sarcasm>
So where are we in the cycle?
The guy"s name is Grandpierre. Big Peter?
GMU is my Alma Mater - it is where I learned to write computer simulations.
I guess we'd better get going on warming up that earth then!
There's no time to lose!
That's Attila Big Peter to you.
We're still coming out of the last Ice Age...some are calling it Global Warming.
My immediate world-threat list looks totally different.
I did my part today.
I drove my F250 Four Wheel Drive pickup truck with Triton 5.4 Liter V-8.
A 4200 pound gas guzzling behemoth.
Just doing my part to support global warming.
If Algore wins an Oscar, let's all burn some old tires to celebrate!!
...and ask a few of your liberal friends if they would like to participate! LOL!!
Holocene Interglacial Period? The last ice age ended about 10,000 years ago. So according to this theory we should stay warm a while longer.
Attila Big Peter. Good name.
It's entirely feasible to embrace both if we but put our minds to the task.
He's wrong. It's cow farts all the way.
Embracing both sides of a para a doc's will get you in a lawsuit.
IF true, then it's good we've been practicing our global warming skills. There's a plan for everything.....
Lord knows we have to worry about something...otherwise the blood-sucking political class and the screaming ninny news media would never be able to fund their lifestyles.
Betcha his wife calls him Hun...
Oh, good one!
Actually, I'm in the camp that is firmly convinced that anthropogenic (man made) global warming is affecting our current climate... and that it's the only thing keeping the overdue ice age at bay!!!!
So throw another log on the fire!
Download the book Fallen Angels (free from Baen's library) by Larry Niven, Jerry Pournelle and Michael Flynn for a fun story based on that premise. They use the opportunity to skewer every liberal sacred cow they can. Fun book.
Seriously, I agree with your comment about still being in the "warm up" phase following the last ice age. It is well within the range of recorded evidence that we've got a lot more natural warming to go before things change, or that we're just about to tip over into another ice age. The most alarming thing to me about the so called science of "global warming" is the conceit of the money grubbing whores jockeying for grant money that somehow what they have known during their lifetimes is "normal" or "right." They simply don't have a clue about the nature of reality.
Eat this data Gore you Idiot:
Ok, have we backed up 30+ years when all these "scientists" originally claimed that our current case of GW started out as "Global cooling"?
Anyone who believes ANY of these idiot "scientists" are mental cases. The same people who can't look out the window and tell if the sun is shining are going to tell us that the climate has changed due to human activity.
I did you one better and drove my Dodge 440 cu in engine motor home around. I've got a carbon footprint that kicks butt.
Thank you devolve. I like your ring of fire, didn't realize it got that big!
I'll go you both one better.
I love Korean food, especially kimchee. Regulate that alGore.
That's the "medium" size!
I have one about 600x600
Now if you tell me that you have two Holly 600 cfm double pumpers on that thing I will start to drool.
We used to have a Korean restaurant in the next town loved the place. Just a little store front run by a former American GI and his Korean wife.
I really miss that place.
Oh WOW, don't blow up the thread with that one, lol!
I wouldn't show that particular graph around here if I were you.
After all if you ignore the blue line and focus on the red (the CO2 ppmv data) then it appears to show that we have a current level about 25% higher then at any time in the past 400,000 years.
I still laugh when the kid skies into the tree top.
Ya, that was my final touch on that one. That KID has a mustache I think, or else it's his mouth??
If he is not careful, he will bite off his tongue.
Make that two handles I love, marktwain. I have "Fallen Angels", on the bookshelf, original hardback from '91. In postscript authors note that solar neutrino emmissions are lower than expected and "astronomers tell us that we are going into a new period of minimum solar activity".
Seems I read we had detected an increase in surface temp not only on Mars, where we actually have stuff, but the moon Triton and the (planet?) Pluto more recently. Pluto, despite moving into aphelion, showed an increase of over 3 degrees F during a recent eclipse of a star.
Memo to Algore: if you don't get the Plutonians to sign Kyoto, the nitrogen snow might vaporize, creating hellacious storms and blowing over their igloos.
If you look at both the blue and red traces, you will see that CO2 is an effect of temperature changes, not a cause. Sometime after the temperature starts rising, CO2 starts rising. Sometime after the temperature falls, CO2 falls.
Shoot, you must have better eyes than me. I'll have to go look at my original frame of that one!
The ring of fire is escaping! She needs an exorcism bad!
I did one way back with red glowing eyes, another one lost in the files, lol
Her face is a thirsty canvas
Always needing more paint
Yes, for her age she does not look good.