Articles Tagged "Solar News"

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Solar cycle may drive Venice's floods
Sunday, August 1st 2010, 6:04 AM EDT
Co2sceptic (Site Admin)
IF YOU want to see Venice while keeping your feet dry, don't go when the sun has lots of spots. Peaks in solar activity cause the city to flood more often, apparently by changing the paths of storms over Europe.

Several times a year, but most commonly between October and December, Venice is hit by an exceptional tide called the acqua alta. David Barriopedro at the University of Lisbon, Portugal, and colleagues were intrigued by studies showing the tides followed an 11-year cycle, just like the sun, showing peaks when the sunspots were most abundant. They looked at hourly observations of sea level between 1948 and 2008, which confirmed that the number of extreme tides followed peaks in the solar cycle (Journal of Geophysical Research Atmospheres, DOI: 10.1029/2009JD013114).

Records of air pressure over Europe over the same period revealed "acqua alta years" saw a lot of low-pressure systems over the north Adriatic Sea, while in quiet years these systems were further south.

This make sense, because flooding events in Venice are known to be triggered by low-pressure systems from the Atlantic. These systems allow sea levels to rise, while stormy winds blow from south to north, piling up seawater around Venice. In quiet solar years, the storms are shifted to the south, but it remains unclear exactly how solar activity has these affects on the weather.

Click source for more & links
Source Link: newscientist.com
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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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.

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Source Link: spacedaily.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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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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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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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 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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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 affecting global climate, say scientist
Friday, July 17th 2009, 5:31 AM EDT
Co2sceptic (Site Admin)
Research led by scientists at the National Science Foundation-funded National Center for Atmospheric Research (NCAR) in Boulder, Colorado, has shown that maximum solar activity and its aftermath have impacts on Earth similar to that caused by ocean currents La Niña and El Niño in the tropical Pacific Ocean.

The research, while establishing a key link between the solar cycle and global climate, may pave the way toward predictions of temperature and precipitation patterns at certain times during the approximately 11-year solar cycle.

"These results are striking in that they point to a scientifically feasible series of events that link the 11-year solar cycle with ENSO, the tropical Pacific phenomenon that so strongly influences climate variability around the world," said Jay Fein, program director in NSF's Division of Atmospheric Sciences. "The next step is to confirm or dispute these intriguing model results with observational data analyses and targeted new observations," he added.
Source Link: domain-b.com
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