Activity on the Sun but it's still the old cycle
Interesting happenings on the Sun the last few days.
We are between the two sunspot cycles, we had seen a few spots from Cycle 24 but we are now seeing a burst of sunspots from Cycle 23.
More at
Space Weather
This week, three big sunspots are crossing the face of the sun and on March 25th one of them (989) produced a strong M-class solar flare. Many readers have asked, is this the new solar cycle? No, it's the old one. Although Solar Cycle 24 has begun, these are not Cycle 24 spots. Their magnetic polarity associates them with old Cycle 23.
Meanwhile Wired magazine is
going all doom and gloom:
Prepare for the Worst, Because Solar Storms Are About to Get Ugly
Every 11 years or so, the sun gets a little pissy. It breaks out in a rash of planet-sized sunspots that spew superhot gas, hurling clouds of electrons, protons, and heavier ions toward Earth at nearly the speed of light. These solar windstorms have been known to knock out power grids and TV broadcasts, and our growing reliance on space-based technology makes us more vulnerable than ever to their effects. On January 3, scientists discovered a reverse-polarity sunspot, signaling the start of a new cycle � and some are predicting that at its peak (in about four years) things are gonna get nasty. Here's a forecast for 2012.
And this article from a 2003 post on
Space.com points to some interesting data:
Sun's Output Increasing in Possible Trend Fueling Global Warming
In what could be the simplest explanation for one component of global warming, a new study shows the Sun's radiation has increased by .05 percent per decade since the late 1970s.
The increase would only be significant to Earth's climate if it has been going on for a century or more, said study leader Richard Willson, a Columbia University researcher also affiliated with NASA's Goddard Institute for Space Studies.
The Sun's increasing output has only been monitored with precision since satellite technology allowed necessary observations. Willson is not sure if the trend extends further back in time, but other studies suggest it does.
"This trend is important because, if sustained over many decades, it could cause significant climate change," Willson said.
In a NASA-funded study recently published in Geophysical Research Letters, Willson and his colleagues speculate on the possible history of the trend based on data collected in the pre-satellite era.
They show a graph that explores historical temperature from tree rings with observed sunspots. A very strong correlation...
Posted by DaveH at March 27, 2008 2:14 PM