NASA "Sonne häutet sich wie eine Schlange"

Geschrieben von Pez am 24. November 2003 15:14:43:

Als Antwort auf: VULKANE / ERDBEBEN / NATURPHÄNOMENE - 24.11.2003 (o.T.) geschrieben von Krümel am 24. November 2003 08:45:20:

Hab ich heute bekommen,
grüsse pez

Anbei einige interessante Kommentare und gesammelte Artikel von Herr Dr. Ralph Kutza
MfG
Manfred Zimmel
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Kaum dass den Menschen nicht mehr weisgemacht werden kann, die Sonnenaktivität sei völlig normal und verlaufe erwartungsgemäß nach dem angeblichen Aktivitäts-Peak im Jahr 2000 abklingend, ziehen die NASA-Fritzen ein wundersames Kaninchen aus dem Hut.
Man habe nun ganz neu erkannt, dass sich die Sonne "häute wie ein SCHLANGE" (eine Wortwahl, die esoterisch-spirituell-mystisch Angehauchte erheblich elektrisieren dürfte).
Durch mehr als 1000 koronale Massenauswürfe (CMEs) hinweg vollziehe sich in abschließender Weise ein gewalttätiger Magnetfeldwechsel der Sonne. Diese CMEs würden Überbleibsel der alten Magnetfeldorientierung der Sonne sowie Störungen, die durch Magnetfeldeinflüsse von Sonnenflecken entstanden seien, beseitigen wie bei einem "Frühjahrsputz". Während die Sonnenfleckenzahl im Juli 2000 ihr Maximum (des sog. 23. Sonnenzyklus) erreicht hätte, wäre dies bei den CMEs erst im Oktober 2002 der Fall gewesen.
Nun, was ist davon zu halten?
Erstmals räumt die NASA eimmerhin in, dass die langjährige Behauptung, im Jahr 2000 sei die solare Aktivität maximal gewesen, blanker Unsinn war.
Zum anderen legt der Bericht nahe, dass IMMER mit so einer gewaltigen CME-Aktivität zu rechnen sei, also alle ca. 11 Jahre und dabei mind. 2 Jahre über das Sonnenfleckenmaximum hinausgehend.
Letzteres ist aber fragwürdig, schon weil wir erst seit vergleichsweise wenigen Jahren diese Magnetfeldorientierung messen können. Und es gibt da dummerweise auch die brandaktuellen deutsch-skandinavischen Forschungerkenntnisse, wonach - belegt durch grönländische Eiskernuntersuchungen - die Sonnenaktivität in den letzten mindestens 1150 Jahren noch nie so hoch war wie in den letzten 60 Jahren. Also ist "aktuell" durchaus etwas ganz erheblich anders als in mindestens 1000 Jahren zuvor!
Angenommen, die NASA-Aussagen sind keine reine Ablenkung, sondern ernst gemeint, aber eine Magnetfeldumkehr der Sonne tritt sehr viel seltener auf als so rasant wie alle 11 Jahre: Dann wäre zum einen zu fragen, ob eine solche "Magnetfeld-Häutung" - sprich -Umkehr - nicht für die Erde extrem bedrohliche Begleitumstände zeitigen wird (Wird dadurch dann ein Erd-Polsprung getriggert? Das Erdmagnetfeld schwächt sich ja seit Jahren ab! Sind die Erde - zeitlich nach einer erfolgten Umgekehrung der Sonnenmagnetfeldausrichtung - erreichende CMEs häufiger gefährlich magnetisch orientiert, haben sie daduch also erheblich häufiger massives Schadenspotential, z.B. in Bezug auf Stromnetze, als in den Jahren zuvor?) ?
Zudem wäre danach zu fragen, wann denn mit einem Ende der "Häutung" bzw. dem CME-Bombardement zu rechnen ist, denn das mit dem CME-Peak im Oktober 2002 erscheint ja ganz aktuell für jedermann nachvollziehbar als ein schlechter Scherz.
Und: Man hätte doch schon viel früher - auch ohne den SOHO-Satelliten - bemerkt, dass CMEs erst Jahre nach dem Sonnenfleckenmaximum ihre maximale Zahl und Heftigkeit erreichen. Dann aber hätte man wiederum nicht bis jetzt "geglaubt" und behauptet, die GESAMTE solare Aktivität, also bezogen auf Sonnenflecken wie auch CMEs, sei im Jahr 2000 maximal. Insofern ist diese aktuelle NASA-Darstellung alles andere als glaubhaft, sondern sie wirkt wie ein Cover-up.
Es besteht jedenfalls leider die Möglichkeit, dass ein solcher Artikel vorbereitet worden ist für die Zeit, ab der man dem diesbezüglich interessierten Teil der Menschheit nicht mehr länger vormachen können würde, dass im Jahr 2000 der Aktivitätshöhepunkt gewesen sei. Das ist seit Ende Oktober 2003 eingetreten. Ursache für die gewaltige CME-Aktivität könnte auch ein sich von südlich der Ekliptik nähernder großer Himmelskörper (Planet X) sein. Wenn dies einer kleinen Minderheit zwar längst bekannt wäre - auch mitsamt den zu erwartenden, zunehmend verheerenden Folgen -, aber vor der Mehrheit verborgen bleiben sollte, würde man beizeiten Alternativ-Geschichten (wie die aktuelle NASA-Meldung?) erstellen, um die zunehmenden Zweifel an der Glaubwürdigkeit und Aufrichtigkeit offizieller Verlautbarungen zu zerstreuen.
RK


http://spaceflightnow.com/news/n0311/19sunflip/

Sun does magnetic flip
NASA-GSFC NEWS RELEASE
Posted: November 19, 2003

Research with the Solar and Heliospheric Observatory (SOHO) spacecraft has revealed the process that may implement the reversal in the direction of the Sun's magnetic field that is known to occur every 11 years. This newly recognized factor in the Sun's magnetic flipping is the cumulative effect of more than a thousand huge eruptions called Coronal Mass Ejections (CMEs).

The CMEs blast billions of tons of electrified gas into space, carrying away the Sun's old magnetic field and allowing a new one with a flipped orientation to form.


This sequence from the Large Angle and Spectrometric Coronagraph (LASCO) instrument on SOHO shows a magnetic structure called a streamer emanating from the Sun. It is a twisted magnetic loop rising from the south pole of the Sun that has trapped hot, electrified gas within, which is glowing brightly. Four days later, a coronal mass ejection erupts from the same region (white and red area near the bottom of second image). After the CME is gone, the streamer has disappeared as well (bottom image). Credit: NASA and the European Space Agency


Reversal of the solar magnetic field is a major event in the Sun's 11-year cycle of stormy activity, when the Sun goes from quiet to active and back again, and the study is the first evidence linking the reversal to CMEs. Since CMEs occasionally disrupt satellites, radio communication, and power systems, solar scientists hope this link will eventually help them better forecast the powerful eruptions.

"The Sun is like a snake that sheds its skin," comments Dr. Nat Gopalswamy of NASA's Goddard Space Flight Center, Greenbelt, Md., lead author of the new report, which appears in the Astrophysical Journal. "In this case, it's a magnetic skin. The process is long, drawn-out and it's pretty violent. More than a thousand coronal mass ejections, each carrying billions of tons of gas from the polar regions, are needed to clear the old magnetism away. But when it's all over the Sun's magnetic stripes are running in the opposite direction."

"This analysis of nearly eight years of CME data is a big step forward in making sense of space weather," said Dr. Joseph Gurman, NASA Project Scientist for SOHO at NASA's Goddard Space Flight Center, Greenbelt, Md. "By identifying the solar origin of these events with CMEs of different speeds and appearances, and at different latitudes, it improves our capability to predict space weather that can affect the Earth, at different phases of the solar activity cycle."

Apparently random CMEs turn out to be signs of the Sun's diligent housekeeping. It keeps sweeping away, out into space, untidy magnetic fields created by sunspots and other contortions in its atmosphere. The climax comes in a busy period of "spring cleaning" after the count of sunspots has peaked, every 11 years. It leaves the Sun with its main magnetic field completely overturned, and its north and south magnetic poles swapped around.

The Astrophysical Journal report published by Gopalswamy and his colleagues takes stock of seven years of observations of such events by the SOHO spacecraft. It also compares them with the mass ejections recorded in 1979-85 by a US Air Force satellite, P78-1. Helping the scientists to decipher the events seen by the spaceborne telescopes are data from ground-based instruments at Kitt Peak, Ariz., and Nobeyama, Japan.

What emerges is a systematic pattern in the outbursts, according to the new research. It changes during the sunspot cycle, as the numbers of dark sunspots seen each day on the Sun's bright surface first increases and then diminishes again. The mass ejections are often directly associated with the sunspots, which always lie in the Sun's equatorial belt or at mid-latitudes.

Other mass ejections occur near the Sun's poles, far away from any sunspots. These events are most frequent at the peak of sunspot activity, but they can continue for a while as the count of sunspots begins to decline. By getting rid of the magnetic remnants of previous activity, the high-latitude outbursts groom the polar magnetic fields in a new configuration, according to the team.

When SOHO began its watch early in 1996, the Sun was quiet. There were very few sunspots and CMEs happened less than once a day. But during the most intense solar activity, 1999-2000, there were more than five a day, on average twice as many as scientists expected. What's more, the average speed of the ejected clouds of gas doubled, from 990,000 to 1,980,000 kilometres per hour (about 610,000 to 1,200,000 miles/hr.).

When the sunspot count passed its peak in July 2000, CMEs continued at a high rate. They did not reach their own peak in frequency until October 2002. Events followed a different timescale in the two polar regions of the Sun. A flurry of high-latitude mass ejections occurred near the solar north pole, completing the magnetic reversal there by November 2000. The south polar region lagged behind, and its new magnetic pole was not "clean" until May 2002. In effect, the solar snake shed the magnetic skin first from its head and then from its tail.

The scientific team includes Gopalswamy, Dr. Alejandro Lara and Dr. Seiji Yashiro of the Catholic University of America, Washington, DC, and Dr. Russell A. Howard of the Naval Research Laboratory, Washington, DC. SOHO is a project of international cooperation between ESA and NASA.





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http://news.bbc.co.uk/1/hi/sci/tech/3226844.stm


Last Updated: Friday, 21 November, 2003, 14:45 GMT

Sun 'sheds its skin like a snake'

By Dr David Whitehouse
BBC News Online science editor



A large flare glares from the Sun's limb...
Astronomers have discovered a key fact required to understand the Sun's 11-year cycle of activity.
Sunspots and flares on the Sun's surface follow the cycle, but expelled gas clouds do not.

It seems that these ejections trail the sunspot peak - they peaked in 2002, two years after sunspots.

The expelled gas takes away the Sun's old magnetic skin allowing a new one to emerge to start a new cycle.

Rotation and convection

The Sun's 11-year cycle of activity - as recognised by the coming and going of sunspots - has been known since 1843, when Heinrich Schwabe, a German astronomer, noticed the pattern.

Years later the activity was recognised as being of magnetic origin by George Ellery Hale, the American astronomer, who, in 1908, saw that sunspots were intensely magnetic.


...and a gas cloud starts on its way
Since then many theories have been put forward to explain the solar rhythm.

The accepted theory is that the sunspot cycle is a consequence of rotation and convection inside the Sun.

The fact that the Sun's outer layers are bubbling, and that the Sun rotates faster at the equator than the poles, and faster on the inside than on the surface, results in a solar dynamo that, over 11 years, becomes increasingly wound up.

So at some stage during the magnetic cycle the Sun has to somehow shed its old, contorted magnetic skin, and allow a newer, less troubled one, to emerge.

'Like a snake'

The Soho (Solar Heliospheric Observatory) satellite may have obtained evidence about how the Sun does it.

Eight years of observing gas eruptions - Coronal Mass Ejections (CME's) - show that they are removing the Sun's old magnetic field bit by bit, first from one pole and the equator, and then the other pole.

"The Sun is like a snake that sheds its skin," says Nat Gopalswamy of Nasa's Goddard Space Flight Center, author of a report in the Astrophysical Journal.

"In this case, it's a magnetic skin. The process is long, drawn-out and it's pretty violent. More than a thousand coronal mass ejections, each carrying billions of tons of gas from the polar regions, are needed to clear the old magnetism away. But when it's all over the Sun's magnetic stripes are running in the opposite direction."

"This analysis of nearly eight years of CME data is a big step forward in making sense of space weather," says Joseph Gurman, Nasa Project Scientist for Soho.

"By identifying the solar origin of these events with CME's of different speeds and appearances, and at different latitudes, it improves our capability to predict space weather that can affect the Earth, at different phases of the solar activity cycle."






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