zaphod
Level 3 Rank
Posts: 210
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Post by zaphod on Dec 28, 2012 20:31:48 GMT
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Post by karlox on Dec 29, 2012 10:52:22 GMT
Some expert around please, take a look at following article (sorry for it is in Spanish) . It comments on new scientific support for the idea that planets could influence sun´s magnetic activity through cycles lasting for 88, 104, 150, 208, 506, 1000 or 2200 years. It refers to an article appeared in digital edition of Astronomy and Astrophysics. Results are from a multinational research team USA-SPAIN-SWITZERLAND and the article names J. A. Abreu and J. Beer del ETH from Zurich... Someone knows more about this? I find it most interesting... Please check www.agenciasinc.es/Noticias/Los-planetas-podrian-influir-en-la-actividad-magnetica-del-SolHad forgotten this translation on topic from the link also commented by Dr. Leif in Questions for Drs. Leif Svalgaard... Thanks for remind me !!  "The planets could disrupt the mechanism that generates the solar magnetic field in a key area of the interior of the star, according to an international study involving the Institute of Astrophysics of Andalusia (CSIC). The phenomenon would also explain other periodicities detected in the magnetic activity of the Sun PHOTOGRAPHS The Sun has an eleven-year cycle over which its magnetic activity. Image: NASA IAA (CSIC) | November 28, 2012 13:21 The Sun has an eleven-year cycle over which its magnetic activity, which manifests itself in the form of patches, which release energy explosions and ejections of material into interplanetary space, ranging from a minimum to a maximum. But beyond this familiar cycle, based on the number of spots that appear on the surface of the Sun, also observed by other magnetic activity with longer periods of 88, 104, 150, 208, 506, or 2200 thousand years. Now an international team of physicists, among which is the researcher Antonio Ferriz-Mas Solar Physics Group of the Institute of Astrophysics of Andalusia (IAA-CSIC) and professor at the University of Vigo, has found an excellent match between cycles long period of solar activity and tidal effects due to the planets. The results are featured today in the online version of the journal Astronomy & Astrophysics. The team, from Switzerland, Spain and the U.S., has painstakingly reconstructed solar magnetic activity of the last ten thousand years looking for that concentration cosmogenic isotopes (beryllium-10 and carbon-14) in ice cores from Antarctica and Greenland . The sample obtained a series periodicities, besides known eleven-year solar cycle, for which there was as yet no explanation in the framework of the dynamo theory, ie the theory that tries to account for how magnetic fields are generated solar and stellar. The magnetic flux warehouse The Sun does not rotate rigidly, but has a differential rotation. In particular, the regions in Ecuador rotating faster than the poles. But this differential rotation occurs only in the outer 30% of the Sun, in the area called convection. Under this zone is the radiative zone, in which the rotation is rigid. Right between the convective and radiative zone is a layer, the tacoclina, which produces very sharp transition between the two. This zone is crucial for the storage and amplification of solar magnetic field, since it would be located in the intense magnetic flux tubes originating sunspots observed on the surface. If tacoclina were slightly flattened and slightly deviating from the axial symmetry, for example, because rotase about an axis slightly inclined relative to the axis of rotation of the sun, the planets may exert torques about the effect of the tide tacoclina (similar to the Moon exerts on Earth's oceans). The tidal effect, though small, and hitherto neglected, could be sufficient to affect the ability to store tacoclina magnetic flux tubes. If so, should meet the same periods in solar activity in the torque exerted by the planets, as the team has discovered precisely. As indicated by Drs J. A. Abreu and J. Beer of the ETH Zurich (Switzerland), the influence of the planets on the solar magnetism long timescale is an interesting hypothesis, which would give a natural explanation for periods of between eighty-eight and 2200 years in the record of solar magnetic activity. If this were so, this study may have important implications for understanding how the Sun and, in particular, solar magnetic activity. Location: International Source: Institute of Astrophysics of Andalusia |
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Post by karlox on Dec 29, 2012 10:52:58 GMT
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Post by miedosoracing on Jan 5, 2013 1:18:46 GMT
Anyone find it interesting how many sun spots just popped up lately. It has been relatively calm and boom suns full.
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Post by cuttydyer on Jan 5, 2013 6:41:16 GMT
Anyone find it interesting how many sun spots just popped up lately. It has been relatively calm and boom suns full. Yes, grabbed my attention. Is it unusual for spots to suddenly form at the higher latitudes this far into a cycle? |
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bigbud
Level 3 Rank
Posts: 180
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Post by bigbud on Jan 5, 2013 9:33:23 GMT
solar activity is rising again, following the tidal cycle This tidal peak is a fairly strong one, and the next one in the summer even stronger. This sunspotcycle is out of phase with the Jupiter-Saturn cycle. Right now the Jupiter-Saturn cycle would favor a new sunspot cycle (if we were not out of phase). So perhaps that explains the high latitude spots, that are normal early in a cycle. See my thread  bb |
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Post by semimadscientist on Jan 19, 2013 20:17:30 GMT
Hello everyone, it's been a long time since I posted on the forum, and on the Solar Cycle 24 Main Discussion XI almost all of the guys I used to know have disappeared. The discussion has been virtually extinct for a long time, and I'm glad that more people are posting in this thread now, although it's by no means busy. I'd really like some scientific discussion back here on this thread, i.e. mainstream theories and inputs from the experts to contribute their thoughts and correct the more pseudoscience inputs.
Since I was last here, the spiky nature of this cycle has been lost, and I put this down to the loss of sychrony between the two hemispheres of the sun. And it seems that this cycle may turn- out to be a double- peaker, similar to the past two.
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Post by lsvalgaard on Jan 20, 2013 3:21:03 GMT
Hello everyone, it's been a long time since I posted on the forum, and on the Solar Cycle 24 Main Discussion XI almost all of the guys I used to know have disappeared. The discussion has been virtually extinct for a long time, and I'm glad that more people are posting in this thread now, although it's by no means busy. I'd really like some scientific discussion back here on this thread, i.e. mainstream theories and inputs from the experts to contribute their thoughts and correct the more pseudoscience inputs. Since I was last here, the spiky nature of this cycle has been lost, and I put this down to the loss of sychrony between the two hemispheres of the sun. And it seems that this cycle may turn- out to be a double- peaker, similar to the past two. Or have a dozen peaks like cycle 14:  or  |
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Post by semimadscientist on Jan 20, 2013 14:39:53 GMT
Thanks Dr S, I've been looking for a good, comprehensive graph of this cycle so far, and those you've posted certainly help! At the present point, there are elements of the multiple- peaks of cycle 14 and of the dual peak of the past few cycles. It'll be really interesting to see how such a low cycle as this turns out.
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Post by kalohux on Jan 21, 2013 22:44:05 GMT
It is not cool not to answer everybodys questions. Is there some kind of secret word I have to write to be answered or do you have some secret club I have not been invited to? I have waited since november 2012 for someone to tell me how to browse the SAM images archive. I am not expecting an answer.  |
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Post by justsomeguy on Jan 22, 2013 21:16:29 GMT
Or have a dozen peaks like cycle 14: or I am still betting we are at or near peak based on the magentic flip happening now - namely no long drawn out cycel 14. Do we have data on magnetic pole flip for 14? |
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Post by semimadscientist on Jan 23, 2013 20:38:30 GMT
I am still betting we are at or near peak based on the magentic flip happening now - namely no long drawn out cycel 14. Maybe; the determiner is the southern hemisphere now, the North has peaked: www.solen.info/solar/images/cycle24.pngCould be that the South will equal the North, or, like during the Maunder Minimum, one hemisphere could produce fewer spots at the peak of that hemisphere relative to the peak of the other. If that will be the case, then cycle 24 could have peaked already. |
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Post by lsvalgaard on Jan 24, 2013 14:57:03 GMT
I am still betting we are at or near peak based on the magentic flip happening now - namely no long drawn out cycel 14. Maybe; the determiner is the southern hemisphere now, the North has peaked: www.solen.info/solar/images/cycle24.pngCould be that the South will equal the North, or, like during the Maunder Minimum, one hemisphere could produce fewer spots at the peak of that hemisphere relative to the peak of the other. If that will be the case, then cycle 24 could have peaked already. cycle 14 may be a guide:  |
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Post by chickenlittle on Jan 25, 2013 22:49:47 GMT
Leif,
Could you post your Sunspot Group Numbers for cycle 14, together with a similar graph for cycle 24 to date, above and below as you do, also with separate lines for the northern and southern hemispheres. thanks.
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Post by semimadscientist on Jan 26, 2013 13:33:57 GMT
cycle 14 may be a guide: This is interesting, in that I wasn't aware that the two hemispheres were so far apart, and that one was lower than the other, during cycle 14. Is this time- lag between the two hemispheres the sole mechanism of "double peakedness" in solar cycles? Also, do you have a source of separate northern and southern hemispheric activity like your graph of cycle 14 for other solar cycles? Thanks again. |
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