Articles Tagged "Solar News"

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Cluster Makes Crucial Step In Understanding Space Weather
Tuesday, July 27th 2010, 2:36 AM EDT
Co2sceptic (Site Admin)
Researchers using the four spacecraft of ESA's Cluster mission have uncovered the long journey that energetic ions undergo during geomagnetic storms and how they ultimately precipitate into the Earth's atmosphere. Such precipitation affects the composition of the ionosphere, preventing GPS and communications satellites from operating correctly.

The Earth's magnetic field acts a buffer zone, shielding the Earth from the permanent flow of ionised matter coming from the Sun. As a result of the interaction of the solar wind with the Earth's field, a protective bubble known as the magnetosphere is formed.

This comprises a complex mixture of electric and magnetic fields, charged particles and resultant current systems. One such system, the so-called Ring current, forms in a doughnut shape around the Earth, and is caused by trapped particles, from either the solar wind or from the Earth's ionosphere, gyrating around the magnetic field lines of the Earth. Changes in the ring current are responsible for global decreases in the Earth's surface magnetic field.

Click source to read FULL report
Source Link: spacedaily.com
Where Have All the Sunspots Gone?
Tuesday, August 25th 2009, 9:09 AM EDT
Co2sceptic (Site Admin)
Background

The authors write that "sunspots are dark regions on the solar disk with magnetic field strengths greater than 1500 gauss," and that "the 11-year sunspot cycle is actually a 22-year cycle in the solar magnetic field, with sunspots showing the same hemispheric magnetic polarity on alternate 11-year cycles."

What was done

Livingston and Penn report what has been known for quite some time now, i.e., that "something is unusual about the current sunspot cycle," and that is, as they describe it, that "the current solar minimum has been unusually long." More specifically, they state that "with more than 670 days without sunspots through June 2009, the number of spotless days has not been equaled since 1933." In addition, they say "the solar wind is reported to be in a uniquely low energy state since space measurements began nearly 40 years ago," citing the work of Fisk and Zhao (2009); and in light of this unique set of observations, they proceed to enlighten us about some important related matters.
Source Link: co2science.org
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Editorial: Sun-Caused Warming
Thursday, September 10th 2009, 2:08 AM EDT
Co2sceptic (Site Admin)
Climate Change: A team of international scientists has finally figured out why sunspots have a dramatic effect on the weather. It shows the folly of fearing the SUV while dismissing that thermonuclear furnace in the sky.

Mankind once worshiped the sun. Now the world studiously ignores it as nations prepare to hammer out a successor to the failed Kyoto Protocol, which expires in 2012, in Copenhagen in December. Something is indeed rotten in Denmark.

Our own government is committed to fighting climate change whether it be though Son of Kyoto or our own growth-capping, job-killing cap-and-trade legislation known as Waxman-Markey

Despite the sun being the major source of all energy on earth, supporters of man-caused global warming have dismissed the sun's role in climate change. They say the historic 11-year solar cycle changes the amount of energy reaching the earth by about only 0.1% — not enough to account for temperature rises this century.
Source Link: ibdeditorials.com
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The Sun could be heading into period of extended calm
Thursday, September 24th 2009, 5:47 AM EDT
Co2sceptic (Site Admin)
Researchers in the US may have discovered further evidence that the Sun is heading towards an extended period of quiet activity, the like of which has not been seen since the 17th century. The impact this may have on climate is poorly understood but it would be good news for satellite communications, which would continue to avoid the harsher impacts of space weather.

Scientists have long known that the Sun's magnetic activity varies over a cycle of approximately 11 years. Greater magnetic activity leads to more "sunspots", or darker patches visible on the solar surface. These sunspots are regions where the magnetic field lines have become twisted due to differential rotation in the outer layers of the Sun.

Particularly violent sunspots can result in the sudden release of magnetic energy in the form of solar flares, which cause the outpouring of protons and electrons into space. Some of these particles can reach the Van Allen radiation belt of Earth – the outer region of Earth's own magnetic field – where they are accelerated to speeds approaching the speed of light. During the solar maxima, when sunspot numbers are at their peak, the abundance of particles shooting around in the radiation belt can become a real hazard to the satellites that reside there.
Source Link: physicsworld.com
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Connections Among Solar Cycle, Stratosphere, and Ocean Discovered
Wednesday, September 9th 2009, 3:14 AM EDT
Co2sceptic (Site Admin)
Subtle connections among the 11-year-solar cycle, the stratosphere, and the tropical Pacific Ocean work in sync to generate periodic weather patterns that affect much of the globe, according to research results appearing in the journal Science.

The findings will help scientists get an edge on predicting the intensity of certain climate phenomena, such as the Indian monsoon and tropical Pacific rainfall, years in advance.

"It's been long known that weather patterns are well correlated to very small variations in total solar energy reaching our planet during 11-year solar cycles," says Jay Fein, program director in the National Science Foundation (NSF)'s Division of Atmospheric Sciences, which funded the research. "What's been an equally long mystery, however, is how they are physically connected. This remarkable study is beginning to unravel that mystery."
Source Link: theepochtimes.com
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Sun's Cycle Alters Earth's Climate
Friday, August 28th 2009, 4:37 AM EDT
Co2sceptic (Site Admin)
Weather patterns across the globe are partly affected by connections between the 11-year solar cycle of activity, Earth's stratosphere and the tropical Pacific Ocean, a new study finds.

The study could help scientists get an edge on eventually predicting the intensity of certain climate phenomena, such as the Indian monsoon and tropical Pacific rainfall, years in advance.

The sun is the ultimate source of all the energy on Earth; its rays heat the planet and drive the churning motions of its atmosphere.

The amount of energy the sun puts out varies over an 11-year cycle (this cycle also governs the appearance of sunspots on the sun's surface as well as radiation storms that can knock out satellites), but that cycle changes the total amount of energy reaching Earth by only about 0.1 percent. A conundrum for meteorologists was explaining whether and how such a small variation could drive major changes in weather patterns on Earth.
Source Link: space.com
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Great ball of fire! Video reveals explosive magnetic power of the Sun
Thursday, October 15th 2009, 6:40 AM EDT
Co2sceptic (Site Admin)
Dramatic eruptions on the Sun have been captured in rare footage by two Nasa spacecraft.

Filmed over two days, the images show large glowing clouds of gas bursting from the Sun's surface and held aloft by the star's twisted magnetic fields.

These huge solar prominences are several times larger than the Earth and are caused by the solar activity cycle. It is one of the most spectacular events that the twin STEREO (Solar TErrestrial RElations Observatory) craft have observed.

Seen against the brilliant solar surface in visible light, they appear as dark filaments because they are relatively cool compared with the Sun's core. But they are bright themselves when viewed against the blackness of space.
Source Link: dailymail.co.uk
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Solar Cycle Driven by More than Sunspots
Thursday, September 17th 2009, 1:53 PM EDT
Co2sceptic (Site Admin)
Sun also bombards Earth with high-speed streams of wind

Image Attachment
This artist's rendering shows the solar wind as it streaks by Earth.

Challenging conventional wisdom, new research finds that the number of sunspots provides an incomplete measure of changes in the Sun's impact on Earth over the course of the 11-year solar cycle. The study, led by scientists at the National Center for Atmospheric Research (NCAR) and the University of Michigan, finds that Earth was bombarded last year with high levels of solar energy at a time when the Sun was in an unusually quiet phase and sunspots had virtually disappeared.

"The Sun continues to surprise us," says lead author Sarah Gibson of NCAR's High Altitude Observatory. "The solar wind can hit Earth like a fire hose even when there are virtually no sunspots."
Source Link: nsf.gov
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Evidence for a solar signature in 20th-century temperature data from the USA and Europe from Geomagnetism and Palaeomagnetism, institut de physique du Globe de Paris
Tuesday, June 30th 2009, 10:10 AM EDT
Co2sceptic (Site Admin)
article image
Icecap Note: Extending the solar TSI (Hoyt and Willson) and US temperatures up to the present time and adding the ocean multidecadal cycles, we see that relationship continue. It also suggest the current cooling trend as it is similar to the trend down in solar and ocean temperatures in the late 1950s and 1960s

by Jean-Louis Le Mouël, Vincent Courtillot *, Elena Blanter, Mikhail Shnirman.
Source Link: pensee-unique.fr
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Solar Winds Triggered By Magnetic Fields
Thursday, November 5th 2009, 4:37 AM EST
Co2sceptic (Site Admin)
Solar wind generated by the sun is probably driven by a process involving powerful magnetic fields, according to a new study led by UCL researchers based on the latest observations from the Hinode satellite.

Scientists have long speculated on the source of solar winds. The Extreme Ultraviolet Imaging Spectrometer (EIS), on board the Japanese-UK-US Hinode satellite, is now generating unprecedented observations enabling scientists to provide a new perspective on the 50-year old question of how solar wind is driven.

The collaborative study, published in this month's issue of Astrophysical Journal, suggests that a process called slipping reconnection may drive these winds

Click source to read FULL article
Source Link: spacedaily.com
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