It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Thank you.
Some features of ATS will be disabled while you continue to use an ad-blocker.
WASHINGTON (AFP) – For years, scientists have been predicting the Sun would by around 2012 move into solar maximum, a period of intense flares and sunspot activity, but lately a curious calm has suggested quite the opposite.
According to three studies released in the United States on Tuesday, experts believe the familiar sunspot cycle may be shutting down and heading toward a pattern of inactivity unseen since the 17th century.
The signs include a missing jet stream, fading spots, and slower activity near the poles, said experts from the National Solar Observatory and Air Force Research Laboratory.
"This is highly unusual and unexpected," said Frank Hill, associate director of the NSO's Solar Synoptic Network, as the findings of the three studies were presented at the annual meeting of the American Astronomical Society's Solar Physics Division in Las Cruces, New Mexico.
"But the fact that three completely different views of the Sun point in the same direction is a powerful indicator that the sunspot cycle may be going into hibernation."
Solar activity tends to rise and fall every 11 years or so. The solar maximum and solar minimum each mark about half the interval of the magnetic pole reversal on the Sun, which happens every 22 years.
Hill said the current cycle, number 24, "may be the last normal one for some time and the next one, cycle 25, may not happen for some time.
"This is important because the solar cycle causes space weather which affects modern technology and may contribute to climate change," he told reporters.
Experts are now probing whether this period of inactivity could be a second Maunder Minimum, which was a 70-year period when hardly any sunspots were observed between 1645-1715, a period known as the "Little Ice Age."
"If we are right, this could be the last solar maximum we'll see for a few decades. That would affect everything from space exploration to Earth's climate," said Hill.
Solar flares and eruptions can send highly charged particles hurtling toward Earth and interfere with satellite communications, GPS systems and even airline controls.
Geomagnetic forces have been known to occasionally garble the world's modern gadgetry, and warnings were issued as recently as last week when a moderate solar flare sent a coronal mass ejection in the Earth's direction.
The temperature change associated with any reduction in sunspot activity would likely be minimal and may not be enough to offset the impact of greenhouse gases on global warming, according to scientists who have published recent papers on the topic.
"Recent solar 11-year cycles are associated empirically with changes in global surface temperature of 0.1 Celsius," said Judith Lean, a solar physicist with the US Naval Research Laboratory.
If the cycle were to stop or slow down, the small fluctuation in temperature would do the same, eliminating the slightly cooler effect of a solar minimum compared to the warmer solar maximum. The phenomenon was witnessed during the descending phase of the last solar cycle.
This "cancelled part of the greenhouse gas warming of the period 2000-2008, causing the net global surface temperature to remain approximately flat -- and leading to the big debate of why the Earth hadn't (been) warming in the past decade," Lean, who was not involved in the three studies presented, said in an email to AFP.
A study in the March 2010 issue of Geophysical Research Letters explored what effect an extended solar minimum might have, and found no more than a 0.3 Celsius dip by 2100 compared to normal solar fluctuations. "A new Maunder-type solar activity minimum cannot offset the global warming caused by human greenhouse gas emissions," wrote authors Georg Feulner and Stefan Rahmstorf, noting that forecasts by the Intergovernmental Panel on Climate Change have found a range of 3.7 Celsius to 4.5 Celsius rise by this century's end compared to the latter half of the 20th century.
"Moreover, any offset of global warming due to a grand minimum of solar activity would be merely a temporary effect, since the distinct solar minima during the last millennium typically lasted for only several decades or a century at most."
Originally posted by snowen20
reply to post by xacto
That is interesting, I was looking at this earlier today.
That being said, is there a reason that you posted a wall of text?
Just curious.
S&F
Originally posted by stereologist
reply to post by thruthseek3r
So how long is long? I can't wait to see you eat crow! You might want to look up the locations of the observatories to see if any of them are from Washington. I've visited one where you can look at the screen and see the live image of the Sun. That was Kitt Peak in AZ.
I have a dog that does the same thing. Call it and it runs in the opposite direction. Researchers find something and a few people just have to run in the opposite direction. Be careful. My dog has been hit by cars due to its reckless contrarian habits.
This trick won't work for so long because the truth will be revealed soon my fellow ATSers.
What has to happen will happen whether you like or not.
There are many ways to make statistics and studies say what you want to say.
What we would need out there is a definite proof of an unbiased study, which would be hard to obtain, especially in this time frame. I'm waiting for your reply.
Originally posted by stereologist
reply to post by thruthseek3r
Here is what you posted.
This trick won't work for so long because the truth will be revealed soon my fellow ATSers.
So what is soon? Is this a day, a week, a year, or a decade, or longer?
What has to happen will happen whether you like or not.
Not sure if you are suggesting fate, but I do not believe in fate.
There are many ways to make statistics and studies say what you want to say.
Where are you going with this comment? Are you saying that the sun is, or is not going to "hibernate"?
What we would need out there is a definite proof of an unbiased study, which would be hard to obtain, especially in this time frame. I'm waiting for your reply.
There were 3 independent studies here. Are you suggesting 1 or more is biased?
You would realize that ain't no such thing as coincidences nor luck, only part of what has to happen.
only telling you that studies can be manipulated to say whatever ones want the others to see.
Originally posted by stereologist
reply to post by Ophiuchus 13
Don't think you understand magnetism. Besides, what does this have to do with anything being discussed here?
Now when you pull them apart after attraction what happens you feel a lil snap between the 2 mags. This snap is both mags regathering their original energies.