Commentary on the Article about the Interplanetary Magnetic Field influences

Guest essay by Dr. Tim Ball

The comment by “steven” (Oct 9, 8:20 am) on this web site about an article by Lam, Chisham and Freeman (LCF) says correctly that “The science is getting settled-er and settled-er.” Finally, we are getting beyond the 30-year hiatus in climate science created by the IPCC focus on CO2. The LCF article extends knowledge a little, but fails to consider the wider climatological picture of interactions between solar events and weather patterns. It also contains some illogic. Impact of solar effects are more likely to be stronger at the Equator because of the spherical presentation of the Earth and its magnetic field to solar inputs, although it is true the Earth’s magnetic field is concentrated at the Poles (dipoles) and can concentrate incoming solar effects as evidenced by the aurora. These events are interesting and speak to the validity of the paper because aboriginal people of the Arctic used the aurora for weather forecasting.

The Jet Stream (traditionally called the Circumpolar Vortex) is a function of temperature and subsequent pressure difference at the boundary between cold polar air and warm tropical air.

It marks the Zero Energy Balance (ZEB) boundary between the polar areas of the atmosphere in negative energy balance and the intervening tropical area of positive energy balance. (Figure 1 A). The ZEB shifts seasonally as depicted for the Northern Hemisphere in Figure 1 B.

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So while the theory of this article may speak to the Jet stream and its inherent Rossby Waves, it doesn’t explain those Rossby Waves. More important it doesn’t explain the other important weather pattern determining upper level winds, the Equatorial Easterlies (EE). Their reversals are important because they drive the major weather patterns of El Nino and La Nina. Other questions include, what causes the EE to weaken and then reverse their direction? What creates the generally sinusoidal pattern of the Rossby Waves and the changes in the number of Waves generally between 1 and 8.

The challenge is to have a mechanism that explains the relationship between external forces creating internally generated weather patterns, the weather patterns created by internal forces and then the way those, in turn, are affected by external forces.

I first tried to address these issues publicly in an article on John Daly’s web site;

http://www.john-daly.com/guests/tim-ball.htm

Some readers will be interested in reading what was going on at John Daly’s web site before the IPCC hijacked climatology, as evidenced by the leaked CRU emails.

http://www.john-daly.com/guests.htm

Anthony wrote about John’s pioneering work,

http://wattsupwiththat.com/2011/11/23/john-l-dalys-message-to-mike-mann-and-the-team/

 

but he needs more recognition and celebration. You can read more about John here;

http://www.quadrant.org.au/blogs/doomed-planet/2009/11/john-l-daly

Phil Jones of the CRU provided a perverse accolade in the leaked emails when on hearing of John’s death he wrote, “in an odd way this is cheering news.” Undoubtedly, this would have amused John.

Here is another more recent article I wrote on the subject of changing major wind patterns and a possible solar connection. The problem is part of the ongoing difficulty of the difference between climatology and climate science. The latter tries to interrelate all the variables and factors, the latter only looks through specialized perspective of one piece of a very complex puzzle.

———————

What Causes El Niño / La Niña? IPCC Doesn’t Know, But Builds Models and Makes Projections Anyway

by DR. TIM BALL on DECEMBER 16, 2012

 

The Intergovernmental Panel on Climate Change (IPCC) perpetuates the deception that they examine all causes of climate change. They only examine human causes, which you can’t identify if you don’t know or understand natural causes. They tacitly acknowledged the problem by widening the definition in the 2007 Report, but little changed.

Studying human impact excludes anything outside the terrestrial system. They cynically included the Sun in their list of human forcing mechanisms (Figure 1), but then only studied variations in insolation (electromagnetic radiation) thus excluding other solar and astronomic changes.

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Figure 1: Source IPCC AR4

It’s a circular argument developed during the ozone debate. Ozone is created by the UV portion of sunlight. They assumed it was constant, which meant any change in ozone must have a terrestrial cause. Claim everything outside the terrestrial system is constant then climate change must have a terrestrial cause. Imply climate doesn’t change much naturally, and you can argue recent changes are unnatural – that is, caused by humans.

clip_image005

Figure 2: General Global Wind Patterns

Wind is the most ignored weather variable in weather and climate research. Increase global wind speed by one kph and it alters critical dynamic mechanisms, including evaporation and transport of energy. There are three large average surface wind patterns few know about: the tropical easterlies (tradewinds), the midlatitude westerlies and the polar easterlies, but variability results in significant weather changes.

Large gaps in knowledge and understanding create unquestioned acceptance of illogical situations. For example, El Niño creates warm water on one side of the Pacific and cool on the other; La Niña is opposite. Yet El Niño supposedly raises global temperatures but La Niña doesn’t. Some argue they are not opposite effects, but the explanations are disturbingly unscientific.

During a significant El Niño, tropical Pacific trade winds relax and warm waters from the Western Equatorial Pacific and from below the surface of the Pacific Warm Pool slosh to the east.

What do “relax” and “slosh” mean?

Wikipedia says,

El Niño/La Niña-Southern Oscillation, or ENSO, is a quasiperiodic climate pattern that occurs across the tropical Pacific Ocean roughly every five years.

However, it also says,

Mechanisms that cause the oscillation remain under study.

Oscillation is caused by ocean current reversal. Wind creates currents so it reverses first, but wind is created by pressure differences so it must reverse. What causes that? They apparently don’t know:

Despite this progress, serious systematic errors in both the simulated mean climate and the natural variability persist.

They conclude,

Finally, it remains unclear how changes in the mean climate will ultimately affect ENSO predictability.

But what causes ENSO?

The IPCC doesn’t know, because they generally ignore sun- / climate-related research. Sun-driven correlations or mechanisms have been ignored for a long time. Harry van Loon and Karen Labitzke expressed the problem in their New Scientist article of September 1988. They wrote,

“Serious” meteorologists still prefer to dismiss any claim that there is a noticeable relationship between the activity of the Sun and events on Earth. And yet, to our own surprise, we have found a highly significant correlation between the state of the atmosphere and solar activity.

They try to deflect the intimidation.

Our analyses are nothing more than statistics. We can only be sure that we are right if someone can explain how such a large influence on the atmosphere can be produced by comparatively small changes in the energy output of the Sun during the solar cycle.

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Figure 3: Rossby wave patterns

Labitzke and Landscheidt produced work on sunspots and ENSO relationships, but they’re not even referenced in IPCC reports. Senior IPCC author Kevin Trenberth knew of the work because he was a fellow presenter at a conference with Labitzke and van Loon. El Niño/La Niña are reversals of surface currents related to reversals of the weak upper level tropical easterlies, but what causes upper level flows to reverse?

Westerlies don’t reverse, but shift from Zonal Flow with few low amplitude Rossby Waves to Meridional Flow with more and higher amplitude Waves (Figure 3). Each produces distinctly different weather patterns. Rossby Waves change patterns are periodic, but the cause is unknown?

Most, but especially the IPCC, seek mechanisms of change within the terrestrial system, whether it’s ENSO, the Jet Stream, Pacific Decadal Oscillation (PDO), Atlantic Multivariate Oscillation (AMO) or other fluctuations. It is more likely the changes are driven externally. There’s a possible mechanism to explain major wind pattern changes like ENSO and the Rossby Waves.

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Figure 4: Solar wind compressing magnetosphere

Solar wind is ionized particles streaming from the sun with varying intensity. It hits the magnetosphere causing compression on the upwind side and a large tail downwind (Figure 4). Pressure on one layer will cause pressure on underlying layers right down through the stratosphere to the troposphere. There must be internal adjustments within each layer besides the transmission of energy, which result in horizontal adjustments of gases within the layer.

Variations in solar wind pressure would create a bellows effect on the atmosphere below the tropopause. Weaker equatorial winds would respond by stopping and reversing their flow thus triggering the ENSO and other periodic oscillations. This is facilitated at low latitudes because Coriolis Effect (CE) of the Earth’s rotation is very weak. Jet Stream flow is much stronger and CE is correspondingly stronger at middle latitude. The bellow effect is insufficient to overcome these forces, so the wind reaction is increased sinuosity as it swings between Zonal and Meridional flow.

Using a narrow definition of climate change to achieve a political agenda means the IPCC ignores most major climate mechanisms, especially outside the terrestrial system. Despite this, they build climate models and make definitive projections that are the basis of devastating and completely unnecessary policies.

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October 10, 2013 2:04 am

impact of solar effects are more likely to be stronger at the Equator because of the spherical presentation of the Earth and its magnetic field to solar inputs, although it is true the Earth’s magnetic field is concentrated at the Poles (dipoles) and can concentrate incoming solar effects as evidenced by the aurora.
Any thoughts on my contribution would be welcome
Climate Change and the Earth’s Magnetic Poles,
A Possible Connection
http://www.akk.me.uk/Climate_Change.htm

Stephen Wilde
October 10, 2013 2:20 am

Good to see such matters getting more attention now that it has ‘clicked’ as to the significance of jet stream variability.
My position is well enough known here.
Who will turn out to have been right ?

Editor
October 10, 2013 2:49 am

Greg says: “Interesting reference but wrong conclusion.”
And your understanding of the term ENSO may be too restricting. Yu et al (2003) included the low-frequency component under the term.
Yu et al (2003):
http://airsea-www.jpl.nasa.gov/publication/paper/Yu-etal-2003-jgr.pdf
The abstract of Yu et al (2003) begins:
“This study speculates that the low-frequency ENSO might have a regulating effect on the activity of episodic westerly wind bursts (WWB) in the western equatorial Pacific (WEP) based upon the analysis of two contrasting El Niño-Southern Oscillation (ENSO) phases during the 1996–2000 period and the onset of the 1982 El Niño. It suggests that rPWEP, the equatorial sea level pressure (SLP) gradient between 130E and 160E, could be a key parameter in relating ENSO to the WWB generation.”
From the text Yu et al (2003):
“The system oscillates between warm (El Nino) to neutral or cold (La Nina) conditions with a periodicity of roughly 2–7 years. WWB affect the onset of an El Niño…because they generate downwelling Kelvin waves that travel a great distance to suppress the thermocline in the eastern equatorial Pacific Ocean and trigger the El Niño related warming of the sea surface…”
From the summary of Yu et al (2003):
“This study suggests that the ENSO might have a regulating effect on the generation of WWB based upon the evidence from the case analysis. Two contrasting ENSO phases, i.e., the onset El Niño phase in the winter/spring of
1996/1997 and the La Niña mature phase in the winter/ spring of 1999/2000 and also the onset of the 1982 El Niño were analyzed.”
Greg says: “It is generally known that El Nino events start in Nino1 region off Peru…”
The dominance of El Niño events evolving from east to west El Niño ended in the 1970s. This was the basis for Trenberth and Stepaniak creating the Trans-NINO Index. See “Indices of El Niño Evolution”:
http://www.cgd.ucar.edu/staff/trenbert/trenberth.papers/tniJC.pdf
Trenberth and Stepaniak write:
In particular, before about 1976/77, when there was an abrupt climate shift in the Pacific circulation centered in the Tropics…El Niño events tended to develop first along the coast of South America and then spread westward, as was found in the composites of Rasmusson and Carpenter (1982) based on six warm ENSO events from 1951 to 1972. More recent events developed first in the central Pacific and then spread eastward…”
That suggests that the rest of your hypothesis is unfounded conjecture, Greg.
Greg says: “re ‘sloshing’ , if you used more grown up language you may get taken more seriously”
I am taken seriously by everyone who wants to understand the basic processes of ENSO.
The word “slosh” is also used in peer-reviewed papers during discussions of ENSO. See Hunt and Tsonis (2004):
http://onlinelibrary.wiley.com/doi/10.1029/EO081i048p00581/abstract
See Inman et al. (1996):
http://journals.tdl.org/icce/index.php/icce/article/viewArticle/5229
“Slosh” is also used in press releases and FAQ webpages:
http://www.geotimes.org/june04/NN_ElNinoprediction.html
And:
http://faculty.washington.edu/kessler/occasionally-asked-questions.html
Greg says: “BTW water also ‘piles up’ because it is less dense. ‘Piles’ of less dense water will not flow back under gravity.”
The phenomenon that carries the initial warm water east during the evolution of an El Niño is called a Kelvin wave.
See the discussion of equatorial Kelvin and Rossby waves in the TAMU webpage (from Robert H. Stewart’s online book):
http://oceanworld.tamu.edu/resources/ocng_textbook/chapter14/chapter14_02.htm
Stewart writes:
“Kelvin and Rossby waves are the ocean’s way of adjusting to changes in forcing such as westerly wind bursts. The adjustment occurs as waves of current and sea level that are influenced by GRAVITY, Coriolis force f, and the north-south variation of Coriolis force ∂f/∂y = . There are many kinds of these waves with different spatial distributions, frequencies, wavelengths, speed and direction of propagation. If GRAVITY and f are the restoring forces, the waves are called Kelvin and Poincare waves.”
Also see Taichi Sakagami’s (Duke University) YouTube presentation:

ENSO Basics 101, Greg.

Editor
October 10, 2013 2:55 am

Greg says: “Thanks for the NOAA/Kessler FAQ link Bob…”
You’re welcome. Obviously, Greg, the quote you provided from that webpage is outdated.

October 10, 2013 3:02 am

Dr. Tim Ball said:
“The important point is that the flow of the circumpolar vortex does not reverse, unlike the subtropical winds. However, they are affected as flow changes between zonal and meridional.”
http://www.john-daly.com/guests/tim-ball.htm
This is worth a read on the subject:
http://en.wikipedia.org/wiki/Sudden_stratospheric_warming

Robertvd
October 10, 2013 3:08 am

This is why the indians lost America. Of course real scientist work like this and that is one of the reasons why the IPPC can rule. Divide and conquer.
ps What do you think of the Electric Universe theory?

Bob Layson
October 10, 2013 3:18 am

On a point of usage I must say that where I come from to ‘slosh’ to is to chuck, push, tip or in some way propel liquid about (not that all propulsion of liquids is a kind of sloshing) . The activity of sloshing may, and often does, result in a sloshing sound.

Editor
October 10, 2013 3:30 am

Tim Ball says: “My goodness, such vitriol sloshing around.”
Nice attempt at humor, but it doesn’t work.
Tim Ball says: “The correct term is ‘wind driven set up.’ I think most can understand that phrase.”
Actually, the correct term for the initial transport (sloshing) of warm water east during the evolution of an El Niño is “Kelvin wave”.
Tim Ball says: “I am aware of all the points and topics raised.”
Then you ignored “all the points and topics” in your post here at WUWT.
Tim Ball says: “My concern is the lack of explanation for the wind reversals that drive the reversed ocean currents and water set up. The traditional explanation is the reversal of pressures and this was determined by measuring the pressure difference between Tahiti and Darwin. It begs many questions, some of which I tried to addressed in my article.”
I answered your question with the discussion of Westerly Wind Bursts in my earlier reply to you. Yet you continue to choose to ignore it.
You may wish to revise your post, Dr. Tim Ball, because what you claim is unknown is, in fact, well known.

Editor
October 10, 2013 3:57 am

jorgekafkazar says: “Ich bin ein Slosher.”
Thanks, that’s funny.
jorgekafkazar says: “I share that concern, Tim, and have needled Bob about this more than a few times, and his replies have always been good natured.”
If memory serves, the last time you asked, I had not yet assembled all of the papers that described the causes of Westerly Wind Bursts for “Who Turned on the Heat?”
I have, however, addressed the subject a couple of times in comments here at WUWT since then. See my August 14, 2012 at 8:32 am comment here:
http://wattsupwiththat.com/2012/08/10/not-hot-ocean-sst-around-the-usa-not-anywhere-near-record-levels/#comment-1057462
And my December 15, 2012 at 1:53 am comment here:
http://wattsupwiththat.com/2012/08/10/not-hot-ocean-sst-around-the-usa-not-anywhere-near-record-levels/#comment-1057462
I’ll be happy to prepare a blog post on that subject, Jorge. I’ll simply reprint that chapter I included in the above comment and we can discuss it at length.
Regards

Greg Goodman
October 10, 2013 4:28 am

Bob Tisdale says:
Greg says: “Thanks for the NOAA/Kessler FAQ link Bob…”
You’re welcome. Obviously, Greg, the quote you provided from that webpage is outdated.
==
hey, you propose a reference, then when I read it you tell me it’s “obviously” out of date.
Explanations I’ve seen (including several links you’ve provided) have all been hand-waving generalities. Just another orthodoxy whipped up in the absence of a clear proof. In your endeavours to educate yourself and understand ENSO you seem have bought into the orthodoxy.
How about an alternative hand-waving generalised argument?
Soli-lunar driven tides in the thermocline cause a rise in deep, cold water along the peruvian coast. This equally means warmer, surface water flows in the opposite direction. This will cause a lens of warmer water which, being less dense, will settle with a higher mean level than the global average. As the warmth accumulates, tropical storms are triggered causing up draft. This induces zonal wind increase, deflected by Coriolis effect and becoming trade winds.
More water gets driven west creating atm depression in pacifiic warm pool which again amplifies trade winds.
Once the deep tide starts to ebb, the warm water will start to rise, now being than gravitational equilibrium it will start to flow back along the equatorial counter currents.
Most of that will tie with what you have already picked up except that it provides an initial cause. That seems to me a lot more satisfactory that saying “it triggers itself”.
ARGO data should make this detectable hence falsifiable.
I have already seem such an animation of the thermocline but it only ran for two years. We see such a wave but it’s too short to say more.

Greg Goodman
October 10, 2013 4:32 am

BTW like surface tides, these will have many counteracting periods that interact and vary the tidal range.That plays directly into your ENSO hypothesis of long term periodic variations in amplitude providing a means to jack up (or jack down) temps.

Doug Huffman
October 10, 2013 4:32 am

John F. Hultquist says: October 9, 2013 at 9:23 pm “Also, there is this famous quote:
“”When I use a word,” Humpty Dumpty said in rather a scornful tone, “it means just what I choose it to mean — neither more nor less.” (Through the Looking Glass, Chapter 6)
One of my rhetorical favorites, but I always include the punchline;
“But ‘glory’ doesn’t mean ‘a nice knock-down argument’,” Alice objected.
“When I use a word,” Humpty Dumpty said, in rather a scornful tone, “it means just what I choose it to mean—neither more nor less.” [ … ] “The question is,” said Humpty Dumpty, “which is to be master—that’s all.”

vukcevic
October 10, 2013 4:34 am

Tim Ball says:
October 9, 2013 at 10:57 pm
My concern is the lack of explanation for the wind reversals that drive the reversed ocean currents and water set up. The traditional explanation is the reversal of pressures and this was determined by measuring the pressure difference between Tahiti and Darwin.
The cumulative pressure T-D difference correlates strongly with tectonic activity in the equatorial Pacific,
http://www.vukcevic.talktalk.net/SOI.htm
since tectonics precedes the pressure by a dozen years, it could be cause (or a proxy for another less known variable) but not consequence.
No respectable scientist is likely to stand out and accept a half baked hypothesis (as in the above), but sometimes may be necessary ‘tack against the wind’ in order to move a bit forward.

Greg Goodman
October 10, 2013 4:38 am
October 10, 2013 4:45 am

Because I work with a neural network http://www.global-warming-and-the-climate.com/enso-and-tidal-forcing.htm and look at some of the drivers of ENSO, I would like to point to another possibility.
And that is that the variations of length of day LOD are affected by both the magnetic field and from variation in tidal forcing.
Because tidal forcing causes small mass deformation of Earth’s crust, the Oceans and of the atmosphere this cause small variations in the LOD.
I have seen by the help of ANN that LOD is also affected variations in Earth’s magnetic field. I think that some of this connection could be as a result of deformations of Earth’s crust from magnetic variations which cause changes in LOD so that Earth’s angular momentum is uphold.

Greg Goodman
October 10, 2013 4:49 am

In the last frame “JUN” where it stops you can see the high thermocline in the east and the cool SST matches a low sea height anomaly.
conversely the warmer western waters are above normal height despite the lower thermocline. This is the ‘lens’ of warmer water I referred to.
It could also be that perigee cycle is affecting atmosphere ( Richard Holle has been suggesting it’s linked to declination period) and the causality is in the other direction. Maybe a detailed analysis could detect a determining phase lag.
Either would seem better than ‘it causes itself’.

Old'un
October 10, 2013 4:58 am

BOB TISDALE:
‘SLOSH’ works for me Bob – keep up the good work!

vukcevic
October 10, 2013 5:02 am

Per Strandberg (@LittleIceAge) says:
……………….
Largest decadal change in the LOD is strongly correlated to the sunspot cycle
http://www.vukcevic.talktalk.net/SSN-LOD.htm

rgbatduke
October 10, 2013 5:37 am

Part of the impact of solar events could rest with muons. I have never found a historical data base on muons counts so have been unable to see if any type of correlation exists. Periods of increased muons making it through the earth’s atmosphere do seem to affect the winds pushing south out of the Arctic.
I don’t understand this. You assert that you don’t have historical data and then you state that a relationship exists you could only infer from the data. Which is it? I’m not being critical, BTW, only curious.
I’m fond of muons, but I would have thought muon flux is ALWAYS too low to be a “player” in the Earth’s energy balance. Sure, you get order of 100 MeV per event, but we’re talking integer counts of events per cubic meter of air per second, not nearly enough to make it anywhere near the order 10^19 eV needed to make a single joule, even in the entire air column above a square meter of surface. Decay is into electron plus gamma ray plus neutrino, and the gamma ray and neutrino basically are lost without a high probability of thermalizing at all. So I don’t see muons as a direct source of heat, not even if they manage to catalyze the occasional fusion event during their ~2 microsecond lifetime.
They might be some sort of proxy for something else, just like the neutron count for which there IS good data. Indeed, I wouldn’t be surprised if they covary with the neutron count (and hence countervary with solar state). Could you explain your assertion in more detail, plus why you think that they affect (or even are just correlated) with the winds?
That, BTW, is one thing I missed in Dr. Ball’s discussion above as well. Beyond a vague assertion that magnetosphere compression affects pressures (somehow) it was more about “could” than “does”. The Aleutians used the aurora to forecast the weather — how? What were the forecasts? How are they connected to probable weather patterns further south, and are they connected as cause or effect? Basically this is asserting a correlative relationship stable enough to be observed and useful to a primitive people, so surely we can make the observation more concrete by now and do more than just speculate as to causes. Otherwise, sure, I agree, the climate is difficult to compute or predict and there is little evidence that GCMs are successful at computing/predicting it.
rgb

Greg Goodman
October 10, 2013 5:53 am

Per Strandberg , using ANN is an interesting and potentially useful idea but usual GIGO rules apply.
LOD is affected by changes in angular momentum due to large masses of water moving between troposphere and oceans. Also by interactions of fluid mass (mostly ocean) on the solid earth.
To even BEGIN to look at this implies looking a tidal _movement_ not the primary tidal forcing vector.
The interactions of ocean tides with the continental boundaries is where changes in LOD originate, not where the moon is. Also distance of the moon, not the trivial data you fed in.
It is worth noting how often your estimate is out of phase totally with ENSO. How about showing the corr. coeff. I’d guess about 0.2

geran
October 10, 2013 5:54 am

vukcevic says:
October 10, 2013 at 5:02 am
>>>>>
Very interesting graphic prompts a question or two:
1) The LOD line appears to stop about 1980, if my eyes are not deceiving me. Why?
2) Is a correct interpretation then that decreased sun spots coincide with decreased LOD?
Thanks

rgbatduke
October 10, 2013 5:54 am

Because tidal forcing causes small mass deformation of Earth’s crust, the Oceans and of the atmosphere this cause small variations in the LOD.
I have seen by the help of ANN that LOD is also affected variations in Earth’s magnetic field. I think that some of this connection could be as a result of deformations of Earth’s crust from magnetic variations which cause changes in LOD so that Earth’s angular momentum is uphold.

Not that small. Tidal rise and fall of the oceans is order of a meter (and as high as several meters, depending on where you are). IIRC tidal rise and fall of the crust is order of tens of centimeters. That may not sound like a lot UNTIL one takes into account the size of the earth — there’s actually rather a lot of energy involved, but still a small amount of heat per square meter on the surface. Finally, the atmosphere itself “sloshes” up and down in response to the tides, and (on a sphere) the not-exactly vertical motion is accompanied by a coriolis twisting.
I don’t think LOD itself is a cause of anything profound, but it could be a proxy for (as you note) the angular momentum of the Earth shifting around as its moment of inertia undergoes small changes in response to the also shifting tidal torque. That still leaves us with the chore of deducing the causal connection, which to me is not obvious. ANNs (recall) are generalized nonlinear function approximators, and given sufficient internal complexity and a set of inputs they can fit pretty much anything, so successfully building a NN is not sufficient to prove a meaningful relationship — they’ll fit UNmeaningful data or noise if you work hard enough building them.
The real question is whether a network trained on (say) half of the data predicts the other half, and even moreso, if a network trained on one half of the data and tested/validated against the other half of the data can PREDICT data outside of either test or trial set. That’s the predictive modeling game no matter what sort of box, black or otherwise, you wish to use to make the predictions. And then there is causality. Remember, you could be observing an inversion of causality. ENSO causes a mass uplift of the troposphere, which increases the moment of inertia of the planet, which might affect LOD. The NN doesn’t know which is cause and which is effect!
rgb

Greg Goodman
October 10, 2013 5:59 am

” The Aleutians used the aurora to forecast the weather — how? What were the forecasts? ”
Good point, in the early 21st century some northern european tribes used GCMs.
That does not means there was any correlation between the predictions and reality.

Ike
October 10, 2013 6:07 am

well, what a shame. Poor scientist…
Shutdown Cancels Entire US Antarctic Research Program
http://www.livescience.com/40274-shutdown-cancels-antarctic-research.html

October 10, 2013 6:08 am

RGB You say
“Basically this is asserting a correlative relationship stable enough to be observed and useful to a primitive people, so surely we can make the observation more concrete by now and do more than just speculate as to causes. Otherwise, sure, I agree, the climate is difficult to compute or predict and there is little evidence that GCMs are successful at computing/predicting it.”
This points out the difference between computation which is nearly impossible and the prediction of quasi repetitive patterns which is reasonably straight forward. In the latesy post at
http://climatesense-norpag.blogspot.com
I make perfectly reasonable predictions of the coming cooling and also identify the best proxy for solar activity .I say
“Furthermore Fig 8 shows that the cosmic ray intensity time series derived from the 10Be data is the most useful proxy relating solar activity to temperature and climate. – see Fig 3 CD from Steinhilber
http://www.pnas.org/content/early/2012/03/30/1118965109.full.pdf
NOTE !! the connection between solar “activity” and climate is poorly understood and highly controversial. Solar ” activity” encompasses changes in solar magnetic field strength, IMF, CRF, TSI ,EUV, solar wind density and velocity, CMEs, proton events etc. The idea of using the neutron count as a useful proxy for changing solar activity and temperature forecasting is agnostic as to the physical mechanisms involved.”
I really think this is the most useful approach to forecasting per se.