Sun's magnetics coming alive again

When I last looked at the Ap geomagnetic index back in January, it looked pretty grim.

Solar geomagnetic index reaches unprecedented low – only “zero” could be lower – in a month when sunspots became more active

Now with the release yesterday of the new Ap data from NOAA, we see the largest jump in 2 years.

http://www.swpc.noaa.gov/ftpdir/weekly/Ap.gif

We’ve had a rash of sunspots lately, and it appears sol is awakening from its magnetic slumber. The question is: “dead cat bounce” or start of an upwards trend?

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Leif Svalgaard
May 9, 2010 5:35 pm

Leif Svalgaard says:
Ulric Lyons says:
May 9, 2010 at 3:24 pm
0.75 x 77 = 57.75 I thought your graph looked a bit dodgy.
The solution to the puzzle is the constant ‘k’ in wolf’s formula. SIDC uses 0.600, while SWPC [lately, at least] uses 1.000. and 1/0.6 is 1.667, so 67% more.
Your ‘dodgy’ comment is unbecoming for a gentleman.

Leif Svalgaard
May 9, 2010 6:31 pm

vukcevic says:
May 9, 2010 at 11:39 am
That is a ‘much ado about nothing’ ; in some older files there is typo error of pi/3 instead of 2pi/3.
VukGate continues:
So, the sunspot curve has 2pi/3, while the polar field curve uses pi/3 [at latest count]. And since only one of the cosine terms has this offset, there will be a continuously changing phase between the two, belying your claim:

vukcevic says:
May 9, 2010 at 9:48 am
The PF formula in essence, is the same as the sunspot formula with 3-4 year advance, to account for delay of magnetic polarity change between SS and PF .

And

vukcevic says:
May 9, 2010 at 3:01 pm
No need for recalculation, it is the labelling which needs to be adapted.

Well, taking your word for it, we get:
http://www.leif.org/research/Vuk-polar-fields-9.png
Hmmm, it is worse than we thought…
Because:

vukcevic says:
May 9, 2010 at 9:48 am
the Hale Cycle polarity reversals are shown clearly here
http://www.vukcevic.talktalk.net/LFC1.htm

It seems that some handy touch-up work was done with a reversal of the sign in 1921, to make it look like matching the Hale polarities. This shall henceforth be known as “Vuk’s trick”
I would like you to read and understand [and prove that you understood by stating it here in your own words] the 22-year cycle in geomagnetic activity, and how it tells you the polarity of the polar fields to convince yourself that there was no phase reversal of the polar fields at least since the 1840s.
If you refuse to do that, you have just shown yourself to use ostrich-science [“don’t want to know”].

Leif Svalgaard
May 9, 2010 6:33 pm

Ulric Lyons says:
May 9, 2010 at 4:39 pm
I hope some of you here have read my posts on “very cold winters in the last 1500 yrs”
Are they Northern Hemisphere winters? The Southern not being forced, or does it work on summers down under?

May 9, 2010 7:08 pm

Leif Svalgaard says:
May 9, 2010 at 5:24 pm
Wow, that has jumped up some, its almost at 75%!
Leif Svalgaard says:
May 9, 2010 at 5:35 pm
When in Rome……………………………
pseudo-scientists
[but you have a learning disability, it seems].
the impending falsification of your prediction and the ensuing abandonment of your ideas.

Leif Svalgaard
May 9, 2010 7:41 pm

Ulric Lyons says:
May 9, 2010 at 7:08 pm
[but you have a learning disability, it seems].
the impending falsification of your prediction and the ensuing abandonment of your ideas.

Well, I would immediately abandon my theory if my prediction comes out wrong [and not trying to ‘investigate’ where the data or Sun have gone wrong]. However the Sun is well on track for my low prediction…

Leif Svalgaard
May 9, 2010 9:17 pm

vukcevic says:
May 9, 2010 at 3:01 pm
Green looks pretty good to me, far better then anything Svalgaard, Hathaway & co. can come up with.
In my previous post your sloppiness was contagious and I wrongly stated that there would be a varying phase shift. This is not the case, the difference between 2pi/3 and pi/3 is a slight amplitude modulation and only a phase problem for a minor part of the curve. I think that in all your 2pi/3 to pi/3 machinations you got the sunspot curve offset wrong. It should also be pi/3 [then you have one less free parameter] and then you should do the phase difference between SSN and PF on the time offset 194x.x. Anyway, taking your SSN formula [removing the spurious sign reversal in 1921], your SSN curve [shifted earlier as precursor] and PF curve match very well http://www.leif.org/research/Vuk-polar-fields-10.png . In fact, SSN = 0.6444 PF [or DM as I call it]. This is the Svalgaard/Cliver/Kamide relationship you say is so bad. From our paper http://www.leif.org/research/Cycle%2024%20Smallest%20100%20years.pdf :
“Assuming that Rmax = 0 when DM = 0, we fit a straight line through the origin to the two data points for cycle 22 and cycle 23: Rmax = 0.6286 DM (in mTesla) and compute Rmax from this regression line for cycles 22, 23 and 24″ This ‘fit’ is just for calibration and not for statistical testing, as a relationship is taken as given from theory [meaning, that if the theory is right, then this would be the calibration, which we cannot otherwise compute because the sunspot number is arbitrarily defined].
This is, of course, not a surprise, because the same data [cycles 22 and 23] go into both correlations [yours and ours]. It is not difficult to curve fit over a short interval. One can fit almost anything [US postage cost, e.g.]. The issue comes when the fit is used to forecast [or hindcast] outside of the domain where it is defined. That is where the physics comes in. Your fit fails completely on cycle 20, for example, and requires a sign reversal neat year 1900, which we know from geomagnetism did not happen.
Now, you can recover a bit from the wrong sign disaster, by saying: “OK forget about the sign and use only the absolute value” [as you once claimed one had to do to avoid negative sunspot numbers]. After all, in our paper we only use the magnitude and not the sign. That results in this correlation http://www.leif.org/research/Vuk-polar-fields-11.png with an R^2 below 0.6 [as I found for the differences correlation]. And then the correlation is not REALLY good by any measure.

May 10, 2010 3:39 am

Leif Svalgaard : May 9, 2010 at 9:17 pm
……….
Vuk-Gate, I like that, there is a ring to it. Notoriety or obscurity, hey no contest there. I should have checked the Hale cycle graph, it must have been an experiment, done and forgotten, sloppy again. It is removed now.
I am encouraged by your http://www.leif.org/research/Vuk-polar-fields-10.png and 7 year shift effect (phase 2pi/3, pi/3 ?), have to look into it.
Following the B-L theory everything is fine, until the sun hits SC1, 10 & 20. It has also well recognised problem with diffusion for the weak and strong cycles.
My formula follows pretty well the SS period, amplitude and longer term undulations, but fails at same time as the B-L (SC1,10 & 20), this may not be a coincidence.
Now let’s consider a compromise, as I speculate:
The standard solar theory is fine but it is not complete.
Lets assume that there is a external feedback as a part of the process.
External input (as per the formula) is building up to its peaks 1860 &1970 (~110year), the sun follows this build up (amplitude and period), however as the peak approaches there is a sudden collapse in the output; solar magnetic resources are depleted by the previous highs) (?!), the output fails to match. As the external peak passes there is a recovery (nudged by strong external input – BL fails here, vuk Ok). From there the sun can easily follow on the down and up slope again for the next ~100+ years.
You could say, B-L, does OK, it doesn’t need vukcevic. Not so, B-L is not good for recovery from 1800, 1900 lows either, relying on probability for the regular 100+ year recoveries is not convincing, that’s where vuk comes in (not to mention good amplitude and frequency agreement).
The weak external input around 1800’s 1910’s 2020’s (~110 year) explains why the low cycles linger for longer, since there is no strong external input to hurry the sun to the next cycle (the BL diffusion time problem is solved by vuk).
If so then SC20 is satisfactorily resolved, B-L is happy, vukcevic is happy and importantly Svalgaard ‘Rmax’ is happy. What a happy day, hip, hip hurray! Just a speculation (no mechanism available!).
I have to come back for more on http://www.leif.org/research/Vuk-polar-fields-10.png

May 10, 2010 4:32 am

Leif Svalgaard : May 9, 2010 at 9:17 pm
…..
To look at correlation for the rectified values may be wrong.
As I understand formula r = [sum(i =1 to n) of (xi-x mean)(yi-y mean)]/[(n-1)(dev x*dev y)]
since mean values and standard deviation are altered by rectification process.
Therefore one has to stick to signed values.
The unidirectional meridional flow analysis achieves polarity change. Gravity change and possible magnetic feedback from the magnetospheres also would be a positive only (unipolar) value functions, so Hale cycle could be explained in terms of the meridional flow.

May 10, 2010 4:33 am

Leif Svalgaard says:
May 9, 2010 at 6:33 pm
“Are they Northern Hemisphere winters? The Southern not being forced, or does it work on summers down under?”
I refer you to:
Ulric Lyons says:
May 7, 2010 at 3:03 am

May 10, 2010 5:35 am

Leif Svalgaard says:
May 9, 2010 at 7:41 pm
After you have examined my findings in detail, It will be apparent to you, as to why I have clearly no intention of abandoning Planetary Ordered Solar Theory, regarding short term Global temperature change, or the cause and nature of the Hale cycle. And good luck with your prediction!

Leif Svalgaard
May 10, 2010 5:46 am

vukcevic says:
May 10, 2010 at 4:32 am
Therefore one has to stick to signed values.
If so, you polar field formula is wrong, because its sign is wrong before 1900. You still did not respond to my request for your understanding of the 22-year cycle in geomagnetic activity and how one can infer the polarity from that. Ostrich science….

May 10, 2010 6:23 am

Polarity switch can be achieved by adding the third factor to the equation, but it isn’t such a good fit (SS undulation) and it is a bit messy.
Q.
A. I am still looking for my daughter’s old compass.
My Q: What about BL-Vuk hypothesis?

Leif Svalgaard
May 10, 2010 6:42 am

vukcevic says:
May 10, 2010 at 6:23 am
Polarity switch can be achieved by adding the third factor to the equation, but it isn’t such a good fit (SS undulation) and it is a bit messy.
So, you acknowledge that the polarity is wrong, but can be fixed by adding another wheel.
A. I am still looking for my daughter’s old compass.
Ostrich science. You don’t want to know. Now, there is no need to be afraid of this. It is not difficult to understand, even for engineers. Make a stab at it, and show you can reason or at least follow an argument chain. If not, well, perhaps that is not a surprise then.
My Q: What about BL-Vuk hypothesis?
Total nonsense. But, as you say, no mechanism implied, so no need to consider anything.

May 10, 2010 7:48 am

The return of Murphy`s winter, 1837/8, will be from late January/February 2017, earlier in January will be milder. {+179.05=112 Venus synodic periods}

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