# Astro-Climate-Connection

## Saturday, December 5, 2015

### Solar Terrestrial Climate Weave

Here is a modified plot of Paul Vaughan's Solar Terrestrial Climate Weave of volatility (i.e. either standard deviation or variance) of some, as yet, unspecified variable. Clearly, Paul finds that there is a seasonal pattern in the variance of this unspecified variable that repeats itself once every 11 years i.e. it changes phase by 180 degrees roughly every 5.5 years (2 x 5.5 = 11.0 years).

It would really help if Paul indicated the nature of the variable whose variance (or standard deviation) he is measuring so that others could share in this important [long-standing] discovery.

## Wednesday, November 25, 2015

### Previously established facts about the lunar influence upon the Quasi-Biennial Oscillation (QBO).

Pukite [1] has identified four spectral peaks that contribute the greatest power to his QBO model.

These are:

Period________Relative Strength____________Pukite's Attribution

These have been previously identified by Vaughan [2] who has attributed their discovery to Piers Corbyn on or before the 29th November 2009.

[N.B. Mean Parameters used (J2000) in this analysis are:

Synodic month = 29.5305889 days

anomalistic month = 27.554550 days

Draconic month = 27.212221 days

Tropical month = 27.321582 days

These are:

Period________Relative Strength____________Pukite's Attribution

**2.370 years**________54.6________________Draconic month annually aliased**2.528 years**________25.3________________Mf' annually aliased**2.715 years**________22.1________________Tropical month annually aliased**1.960 years**________21.6________________half x (the anomalistic cycle annually aliased)These have been previously identified by Vaughan [2] who has attributed their discovery to Piers Corbyn on or before the 29th November 2009.

[N.B. Mean Parameters used (J2000) in this analysis are:

Synodic month = 29.5305889 days

anomalistic month = 27.554550 days

Draconic month = 27.212221 days

Tropical month = 27.321582 days

Tropical year = 365.242189 days]

Vaughan[3], himself has shown that:

[N.B. this almost exactly twice the nominal mean period for the Earth's Chandler wobble

of 432.8 days i.e. 2 x 432.8 days = 2.370 tropical years]

2 (2.369718 x 2.715425) /(2.369718 + 2.715425) = 2.530930 tropical years

which rounds to

Synodic month = 29.5305889 days

nearest harmonic of tropical year:

(365.242189) / 12 = 30.43684908 days

physical aliasing:

(30.43684908)*(29.5305889) / (30.43684908 – 29.5305889) = 991.7881136 days

(991.78821136) / 365.242189 = 2.715426 tropical years which rounds to

Vaughan[3], himself has shown that:

**a) 1.960 tropical years - half x (the anomalistic lunar monthly cycle annually aliased).**

anomalistic month = 27.554550 days

nearest harmonic of tropical year:

(365.242189) / 13 = 28.095553 days

physical aliasing:

0.5 * (28.095553)*(27.554550) / (28.095553 – 27.554550) = 715.486162 days

(865.5210016) / 365.242189 = 1.958936 tropical years which rounds to

nearest harmonic of tropical year:

(365.242189) / 13 = 28.095553 days

physical aliasing:

0.5 * (28.095553)*(27.554550) / (28.095553 – 27.554550) = 715.486162 days

(865.5210016) / 365.242189 = 1.958936 tropical years which rounds to

**1.959 tropical years**.

**b) 2.37 tropical years - the Draconic lunar monthly cycle annually aliased**

Draconic month = 27.212221 days

nearest harmonic of tropical year:

(365.242189) / 13 = 28.095553 days

physical aliasing:

(28.095553)*(27.212221) / (28.095553 – 27.212221) = 865.5210016 days

(865.5210016) / 365.242189 = 2.369718 tropical years which rounds to

nearest harmonic of tropical year:

(365.242189) / 13 = 28.095553 days

physical aliasing:

(28.095553)*(27.212221) / (28.095553 – 27.212221) = 865.5210016 days

(865.5210016) / 365.242189 = 2.369718 tropical years which rounds to

**2.37 tropical years**.[N.B. this almost exactly twice the nominal mean period for the Earth's Chandler wobble

of 432.8 days i.e. 2 x 432.8 days = 2.370 tropical years]

**c) 2.528 tropical years [This is my little contribution]**

**This very close to the harmonic mean of 2.715 and 2.370 i.e.**

2 (2.369718 x 2.715425) /(2.369718 + 2.715425) = 2.530930 tropical years

which rounds to

**2.531 tropical years**

**d) 2.715 tropical years**

**- the Synodic or the Tropical lunar monthly cycles annually aliased.**

Synodic month = 29.5305889 days

nearest harmonic of tropical year:

(365.242189) / 12 = 30.43684908 days

physical aliasing:

(30.43684908)*(29.5305889) / (30.43684908 – 29.5305889) = 991.7881136 days

(991.78821136) / 365.242189 = 2.715426 tropical years which rounds to

**2.715 tropical years**.

**OR**

Tropical month = 27.321582 days

nearest harmonic of tropical year:

(365.242189) / 13 = 28.095553 days

physical aliasing:

(28.095553)*(27.321582) / (28.095553 – 27.321582) = 991.7877480 days

(991.7877480) / 365.242189 = 2.715425 tropical years which rounds to

As an added check, the above analysis indicates that if we take the beat period between the 2.370 tropical year aliased QBO Draconic period by the 2.715 tropical year aliased QBO Synodic period i.e.

2.715426 x 2.369718 / (2.715426 - 2.369718) =

we should get the same period as beat of the Draconic year (=346.62007589 days) with the tropical year i.e.

(365.242189 x 346.62007588) / (365.242189 - 346.62007589) = 6798.383967 days

__________________________________________________=

[1] http://contextearth.com/2015/11/07/more-refined-fit-of-qbo/#comment-174237

[2] https://tallbloke.wordpress.com/suggestions-14/comment-page-1/#comment-109035

[3] https://tallbloke.wordpress.com/suggestions-15/comment-page-1/#comment-109392

nearest harmonic of tropical year:

(365.242189) / 13 = 28.095553 days

physical aliasing:

(28.095553)*(27.321582) / (28.095553 – 27.321582) = 991.7877480 days

(991.7877480) / 365.242189 = 2.715425 tropical years which rounds to

**2.715 tropical years**.

**CHECK:**As an added check, the above analysis indicates that if we take the beat period between the 2.370 tropical year aliased QBO Draconic period by the 2.715 tropical year aliased QBO Synodic period i.e.

2.715426 x 2.369718 / (2.715426 - 2.369718) =

**18.61338**tropical yearswe should get the same period as beat of the Draconic year (=346.62007589 days) with the tropical year i.e.

(365.242189 x 346.62007588) / (365.242189 - 346.62007589) = 6798.383967 days

__________________________________________________=

**18.61336**tropical years.**References:**[1] http://contextearth.com/2015/11/07/more-refined-fit-of-qbo/#comment-174237

[2] https://tallbloke.wordpress.com/suggestions-14/comment-page-1/#comment-109035

[3] https://tallbloke.wordpress.com/suggestions-15/comment-page-1/#comment-109392

## Thursday, November 12, 2015

### A link between the Lunar tidal cycles and the planetary orbital periods of Venus, Earth, Jupiter and Saturn

**SUMMARY OF RESULTS:**

**The 2.334740 tropical year lunar tidal period is effectively just the synodic product of the lunar Draconic Year (DY) with the Synodic period of Venus and the Earth.**

**There is a link between the synodic orbital periods of Venus/Earth and Jupiter/Saturn with the Lunar Nodal Cycle (LNC), Lunar Anomalistic Cycle (LAC), and the lunar Draconic Year (DY).**

**[N.B. all values above are in tropical years]**

**N.B. In addition, a connection was found between the synodic orbital periods of Venus/Earth and Jupiter/Saturn and the LAC when the time variables were expressed in sidereal years.**

**Please look at:**

**http://astroclimateconnection.blogspot.com.au/2015/05/the-six-year-re-alignment-period.html**

**START OF MAIN POST:**

In an earlier post located at:

http://astroclimateconnection.blogspot.com.au/2015/11/two-new-connections-between-planetary.html

**A.**It was established that if you took the minimum period between the times of maximum change in the tidal stresses acting upon the Earth that are caused by changes in

**the direction**of the lunar tides (i.e. 1.89803 tropical years = 2.0 Draconic years), and

**amplitude modulate**this period by the minimum period between the times of maximum change in tidal stresses acting upon the Earth that are caused by changes in

**the strength**of the lunar tides (i.e. 10.14686 tropical years = 9.0 Full Moon Cycles), you found that the 1.89803 year tidal forcing term is split into a positive and a negative side-lobe, such that:

Positive side-lobe

[10.14686 x 1.89803] / [10.14686 – 1.89803] =

Negative side-lobe

[10.14686 x 1.89803] / [10.14686 + 1.89803] = 1.5989

**2.3348****tropical yrs**= 28.02 months (1)Negative side-lobe

[10.14686 x 1.89803] / [10.14686 + 1.89803] = 1.5989

**tropical yrs**

**(2)**

where

10.146856 tropical years = 3706.059873 days = 9.0 Full Moon Cycles (FMC) and 1.0 FMC = 411.78443029 days = 1.127428 tropical years is the synodic beat period between the mean anomalistic month and the mean Synodic month.

1.89803 tropical years = 693.2401518 days = 2.0 Draconic Years and

1.0 Draconic Year = 346.62007588 days = 0.949014 tropical years is the synodic beat period between the between the mean Draconic month and the mean Synodic month.

Equation (1) can be rewritten as:1.0 Draconic Year = 346.62007588 days = 0.949014 tropical years is the synodic beat period between the between the mean Draconic month and the mean Synodic month.

**(3)**

and equation (2) can be rewritten as:

**(4)**

where

= the Draconic month = 27.212221 days
= the Synodic month = 29.5305889 days

and 1.598939 tropical years = 583.999980 days which differs from the Synodic period of Venus and the Earth by only 1.90 hours.

Adding equations (3) and (4) gives you:

**(5)**

where

DY = 346.6190478 days = 0.9490115 tropical years, which differs from the Draconic year by only 1.48 minutes.

**Hence, the 2.334740 tropical year lunar tidal period is effectively just the synodic product of the lunar Draconic Year (DY) with the Synodic period of Venus and the Earth.**

**B.**It was established that:

**(6)**

where

LNC = Lunar Nodal Cycle = 18.6000 tropical years

LAC = Lunar anomalistic Cycle = 8.8505 tropical years

which, with the substitution of equation (5), can be rewritten as:

**(7)**

**Hence, equation (7) shows that there is a link between the synodic orbital periods of Venus/Earth and Jupiter/Saturn with the Lunar Nodal Cycle (LNC), Lunar Anomalistic Cycle (LAC), and the lunar Draconic Year (DY).**

## Friday, November 6, 2015

### Two new connections between the Planetary and Lunar Cycles

updated: 09/11/2015 (see bottom of post)

1. The Connection Between the Lunar Tidal Cycles and the Synodic Period of Venus and the Earth.

1. The Connection Between the Lunar Tidal Cycles and the Synodic Period of Venus and the Earth.

The first direct connection between the planetary orbital periods and the lunar tidal cycles can be found in a previous blog post that is located at:

In this post it was found that:

If you take the minimum period between the times of maximum change in the tidal stresses acting upon the Earth that are caused by changes in

**the direction**of the lunar tides (i.e. 1.89803 tropical years), and**amplitude modulate**this period by the minimum period between the times of maximum change in tidal stresses acting upon the Earth that are caused by changes in**the strength**of the lunar tides (i.e. 10.14686 tropical years), you find that the 1.89803 year tidal forcing term is split into a positive and a negative side-lobe, such that:
Positive side-lobe

[10.14686 x 1.89803] / [10.14686 – 1.89803] =

Negative side-lobe

[10.14686 x 1.89803] / [10.14686 + 1.89803] = 1.5989

1.89803 tropical years = 693.2401518 days = 2.0 Draconic Years and

1.0 Draconic Year = 346.62007588 days = 0.949014 tropical years.

[10.14686 x 1.89803] / [10.14686 – 1.89803] =

**2.3348****tropical yrs**= 28.02 monthsNegative side-lobe

[10.14686 x 1.89803] / [10.14686 + 1.89803] = 1.5989

**tropical yrs**

N.B.

10.146856 tropical years = 3706.059873 days = 9.0 Full Moon Cycles (FMC) and

1.0 FMC = 411.78443029 days = 1.127428 tropical years.1.89803 tropical years = 693.2401518 days = 2.0 Draconic Years and

1.0 Draconic Year = 346.62007588 days = 0.949014 tropical years.

The time period of the positive side-lobe is almost exactly the same as that of the Quasi-Biennial Oscillation (QBO). The QBO is a quasi-periodic oscillation in the equatorial stratospheric zonal winds that has a mean period of oscillation of approximately 28 months.

Even more remarkable is the time period of the negative side-lobe. It is almost exactly the same as that of the synodic period of the orbits of Venus and the Earth (i.e. 583.92063 days = 1.5987 tropical years), agreeing to within an error of only ~ 1.8 hours.

2. The Connection Between the Lunar Tidal Cycles and the Synodic Period of Jupiter and Saturn.

**(8/19.8592) + (8/18.6000) + (4/8.8505) = 3/(2.3348)**

where

**19.8592**tropical yrs = the synodic period of Jupiter and Saturn.

18.6000 tropical yrs = time for the lunar line-of-nodes to precess around the Earth w.r.t. the stars.

8.8505 tropical yrs = time for the lunar line-of-apse to precess around the Earth w.r.t. the stars.

**2.3348**tropical yrs = 28.02 months approximately equal to the average length of the QBO.

This can be rewritten as:

**(8/19.8592) + (8/9.0697) = 3/(2.3348)**

Hence, we have an expression where the first term on the left is a bi-decadal oscillation, the second term on the left is a quasi-decadal oscillation and the denominator of the first term on the right is near to, but not precisely at, the nominal QBO oscillation period of 2.371 tropical years.

Remarkably, however, the denominator of the first term on the right-hand side is exactly that of the positive side-lobe produced by the amplitude modulation in part 1.

Hnece, we have established two new connections between the synodic periods of Earth/Venus and Jupiter/Saturn that directly link into the variations in the stresses placed upon the Earth's atmosphere and oceans by the luni-solar tidal cycles

UPDATE: 09/11/15

A third connection between the orbital period of Jupiter and the lunar Draconic year.

In my 2008 paper (that was eventually published in 2010) i.e.

Wilson, I.R.G., 2011, Are Changes in the Earth’s Rotation

Rate Externally Driven and Do They Affect Climate?

The General Science Journal, Dec 2011, 3811.

http://gsjournal.net/Science-Journals/Essays/View/3811

I showed that:

5.0 Draconic years = 0.4 Jupiter orbits = 4 x 433.275 days = 4 x Chandler wobble = 2 x QBO

(with 1 Jupiter orbit = 4332.75 days = 11.8627 tropical years)

This is equivalent to:

50 Draconic years = 4 x 11.8627 topical years = 4 x orbital period of Jupiter.

Thanks oldbrew for reminding every one of this additional connection between the Lunar Draconic cycle and orbit of Jupiter that I made back in 2008.

(with 1 Jupiter orbit = 4332.75 days = 11.8627 tropical years)

This is equivalent to:

50 Draconic years = 4 x 11.8627 topical years = 4 x orbital period of Jupiter.

Thanks oldbrew for reminding every one of this additional connection between the Lunar Draconic cycle and orbit of Jupiter that I made back in 2008.

## Saturday, October 31, 2015

### Part B: Are Lunar Tides Responsible for Most of the Observed Variation in the Globally Averaged Historical Temperature Anomalies?

**RETRACTION: The claim made in this blog post that**

**the peak differential lunar force across the Earth's diameter (that is parallel to the Earth’s equator) produces an annually aliased signal with a period of 20.58 years is incorrect. The 384 day period in the peak differential lunar tidal force data that is used to establish 20.58 year bi-decadal period only exists for periods around the 4.53 year long term maxima in lunar tidal force. It turns out that the long term mean spacing between the short-term peaks in the differential tidal force is close to length of the Full Moon cycle, which is equal to 1.12743 tropical years. Hence, the 384 day spacing between peaks does not last long enough for the beat period of 20.58 years to physically meaningful. I would like to thank Paul Vaughan for pointing out this stupid mistake upon my part. In my next post, I will explain why the bi-decadal oscillation is more likely to be explained by a 20.85 tropical year period related to annual aliasing of the lunar tropical and anomalistic months.**

**PART B: A Mechanism for the Luni-Solar Tidal Explanation**

**PART A: Evidence for a Luni-Solar Tidal Explanation**

**[Please see the last post]**

**PART B: A Mechanism for the**

**Luni-Solar Tidal Explanation**

**A. Brief Summary of the Main Conclusions of Part A**.

Evidence was presented in Part A

**to show that the solar explanation for the Quasi-Decadal and Bid-Decadel Oscillations was essentially untenable. It was concluded that the lunar tidal explanation was by far the most probable explanation for both features.**

In addition, it was concluded that observed variations in the historical world monthly temperature anomalies data were most likely determined by factors that control the long-term variations in the ENSO phenomenon.

Further evidence was presented in Part A to support the claim that the ENSO climate phenomenon was being primarily driven by variations in the long-term luni-solar tidal cycles. Leading to the possibility that variations in the luni-solar tides are responsible for the observed variations in the historical world monthly temperature anomaly data

Copeland and Watts [1] did a sinusoidal model fit to the first difference of the HP smoothed HadCRUT3 global monthly temperature anomaly series and found that the top two frequencies in the data, in order of significance, were at 20.68 and 9.22 years.

It is generally accepted that the ~ 9.1 - 9.2 year spectral feature is caused by luni-solar tidal cycles associated with the first sub-multiple of the 18.6 year Draconic cycle 9.3 (=18.6/2) = 9.3 years, possibly merged with the 8.85 year lunar apsidal precession cycle, such that (8.85 + 9.3)/2 = 9.08 years . Hence the question really is:

**Can a plausible luni-solar tidal explanation be given for the 20.68 yr bi-decadal oscillation?**

**B. A Potential Luni-Solar Tidal Mechanism**

Wilson [2] has found that the times when Pacific-Penetrating Madden Julian Oscillations (PPMJO) are generated in the Western Indian Ocean are related to the phase and declination of the Moon. This findings provides observational evidence to support the hypothesis that the lunar tidal cycles are primarily responsible for the onset of El Nino events.

The peak differential tidal force of the Moon (dF) (in Newtons) acting across the Earth's diameter (dR = 1.2742 x 10^7 m), along a line joining the centre of the two bodies, is given by:

where G is the Universal Gravitational Constant (= 6.67408 x 10^-11 MKSI Units), M(E) is the mass of the Earth (= 5.972 x 10^24 Kg), m(M) is the mass of the Moon (= 7.3477 x 10^22 Kg), and R is the lunar distance (in metres) (N.B. that the negative sign in front of the terms on the right hand side of this equation just indicates that the gravitational force of the Moon decreases from the side of the Earth nearest to the Moon towards the side of the Earth that faces away from the Moon.)

Hence, the component of this peak differential lunar force (in Newtons) that is parallel to the Earth's equator is:

In like manner, the component of the peak differential tidal force of the Sun (in Newtons) acting across the Earth's diameter that is parallel to the Earth's equator is:

where Rs is the distance of the Earth from the Sun and Dec(S) is the declination of the Sun.

The relatively rapid daily rotation of the Earth compared to the length of lunar month means that the effects upon the Earth of two differential tidal forces only changes slightly during any given single day. Hence, it is possible to define a slowly changing peak luni-solar differential tidal force acting across the Earth's diameter that is parallel to the Earth's equator, by simply adding each of the two forces above vectorially.

The geocentric solar and lunar distances, solar and lunar declinations and Sun-Earth-Moon angles were calculated at 0:00, 06:00, 12:00, and 18:00 hours UTC for each day designated period (JPL Horizons on-Line Ephemeris System v3.32f 2008, DE-0431LE-0431 [3].) . This data was then used to calculate the peak differential luni-solar tidal force using the equations cited above. Figure 1a shows the calculated peak differential luni-solar tidal force for the period from Jan 1st 1996 to Dec 31 2015:

Figure 1a

The geocentric solar and lunar distances, solar and lunar declinations and Sun-Earth-Moon angles were calculated at 0:00, 06:00, 12:00, and 18:00 hours UTC for each day designated period (JPL Horizons on-Line Ephemeris System v3.32f 2008, DE-0431LE-0431 [3].) . This data was then used to calculate the peak differential luni-solar tidal force using the equations cited above. Figure 1a shows the calculated peak differential luni-solar tidal force for the period from Jan 1st 1996 to Dec 31 2015:

Figure 1a

This plot shows that luni-solar differential tidal force reaches maximum strength roughly every 4.53 years (i.e every 60 anomalistic lunar months = 1653.273 days or every 56 Synodic lunar months = 1653.713 days), with the individual short term peaks near these 4.53 year maximums being separated by almost precisely 384 days (or more precisely 13 Synodic months = 383.8977 days). In order to emphasize this point, figure 1a is re-plotted in figure 1b for the time period spanning from 2000.0 to 2004.5:

Figure 1b.

**C. Discussion**

What figures 1a and 1b show is that peak luni-solar differential tidal stress acting upon the Earth's equatorial regions reaches maximum strength roughly every a 4.53 years. This is very close to half the 9.08 year quasi-decadal oscillation. It also shows that around these 4.53 peaks in tidal stress, the individual peaks in tidal stress are almost precisely separated by 13 Synodic months.

Wilson [4] has proposed that:

*"The most significant large-scale systematic variations of*

*the atmospheric surface pressure, on an inter-annual to*

*decadal time scale, are those caused by the seasons. These*

*variations are predominantly driven by changes in the level*

*of solar insolation with latitude that are produced by the*

*effects of the Earth's obliquity and its annual motion around*

*the Sun. This raises the possibility that the lunar tides could*

*act in "resonance" with (i.e. subordinate to) the atmospheric*

*pressure changes caused by the far more dominant solar-driven*

*seasonal cycles. With this type of simple “resonance”*

*model, it is not so much in what years do the lunar tides*

*reach their maximum strength, but whether or not there are*

*peaks in the strength of the lunar tides that re-occur at the*

*same time within the annual seasonal cycle."*

In essence, what Wilson [4] is saying is that we should be looking at tidal stresses upon the Earth that are in resonance with the seasons. (i.e. annually aliased). If we do just that, we find that the peaks in luni-solar differential tidal stressing every 13 synodic months (= 383.8977 days) will realign with the seasons once every:

**(383.8977 x 365.242189) / (383.8977 - 365.242189) = 7516.06.07 days = 20.58 tropical years**

This is remarkable close to the 20.68 year bi-decadal oscillation seen by Copeland and Watts [1] in their sinusoidal model fit to the first difference of the HP smoothed HadCRUT3 global monthly temperature anomaly series.

Keeling and Whorf [5] gives support to this hypothesis by noting that the realignment time (or beat period) between half of a 20.666 tropical year bi-decadal oscillation and the 9.3 year Draconic cycle is simply 5 times the 18.6 year Drconic cycle:

(10.333 x 9.30) / (10.333 - 9.30) = 93.02 years = 5 x 18.6 tropical years

which is a well known seasonal alignment cycle of the lunar tidal cycles where:

1150.5 Synodic months = 33974.94253 days = 93.020 tropical years

1233.0 anomalistic months = 33974.76015 days = 93.020 tropical years

1248.5 Draconic months = 33974.45667 days = 93.019 tropical years

which only about 7.3 days longer than precisely 93.0 tropical years.

Keeling Whorf [5] claimed that 93 period lunar tidal cycle is able to naturally re-produce the hiatus in the quasi-decadal oscillations of the rate-of-change of the smoothed global temperature anomalies that matched observed between 1900 and 1945.

It could be argued, however, that Keeling and Whorf's figure 03 [reproduced as figure 02 below] actually points a hiatus period between about 1920 and 1950's as this is the period over which the phase changes between the mean solar sunspot number and the peaks in their temperature anomaly curve:

Wilson [6] made a more accurate determination of the times at which the lunar-line-of-nodes aligned with the Earth-Sun line roughly once every 9.3 years {the blue line in figure 3 below] and when the lunar line-of-apse aligned with the Earth-Sun lineonce every 4.425 years [the brown line in figure 3 below]. They then used this to determine the 93 year cycle over which these two alignment cycles constructively and destructively interfered with each other [the red line in figure 3 below]. showing that the period of destructive interference actually extended from about 1920 to 1950's.

Finally, Wilson [6] presented some data that showed that there was circumstantial evidence that the 93 year lunar tidal cycle does in fact influence temperature here on Earth.

Wilson [6] found that

[1] Copeland, B. and Watts, A. (2009), Evidence of a Luni-Solar Influence on the Decadal and Bidecadal Oscillations in Globally Averaged Temperature Trends, retrieved at:

http://wattsupwiththat.com/2009/05/23/evidence-of-a-lunisolar-influence-on-decadal-and-bidecadal-oscillations-in-globally-averaged-temperature-trends/

[2] Wilson, I.R.G. (2016) Do lunar tides influence the onset of El Nino events via their modulation of Pacific-Penetrating MAdden Julian Oscillations?, submitted to the The Open Atmospheric Science Journal.

[3] JPL Horizons on-Line Ephemeris System v3.32f 2008, DE-0431LE-0431 – JPL Solar System Dynamics Group, JPL Pasadena California, available at: http://ssd.jpl.nasa.gov/horizons.cgi, Jul 31, 2013.

[4] Wilson, I.R.G. (2012), Lunar Tides and the Long-Term Variation of the Peak Latitude Anomaly of the Summer Sub-Tropical High Pressure Ridge over Eastern Australia., The Open Atmospheric Science Journal, 6, pp. 49-60.

[5] Keeling, CD. and Whorf, TP. (1997), Possible forcing of global temperature by the oceanic tides. Proceedings of the National Academy of Sciences., 94(16), pp. 8321-8328.

[6] Wilson, I.R.G. (2013), Long-Term Lunar Atmospheric Tides in the Southern Hemisphere, The Open Atmospheric Science Journal, 7, pp. 51-76.

**Hence, it is plausible to propose that the 9.08 year quasi-decadal oscillation and the 20.68 year bi-decadal oscillation can both be explained by variations in the tidal stresses on the Earth's equatorial oceans and atmosphere caused by the peak differential luni-solar tidal force acting across the Earth's diameter that is parallel to the Earth's equator.**

Keeling and Whorf [5] gives support to this hypothesis by noting that the realignment time (or beat period) between half of a 20.666 tropical year bi-decadal oscillation and the 9.3 year Draconic cycle is simply 5 times the 18.6 year Drconic cycle:

(10.333 x 9.30) / (10.333 - 9.30) = 93.02 years = 5 x 18.6 tropical years

which is a well known seasonal alignment cycle of the lunar tidal cycles where:

1150.5 Synodic months = 33974.94253 days = 93.020 tropical years

1233.0 anomalistic months = 33974.76015 days = 93.020 tropical years

1248.5 Draconic months = 33974.45667 days = 93.019 tropical years

which only about 7.3 days longer than precisely 93.0 tropical years.

Keeling Whorf [5] claimed that 93 period lunar tidal cycle is able to naturally re-produce the hiatus in the quasi-decadal oscillations of the rate-of-change of the smoothed global temperature anomalies that matched observed between 1900 and 1945.

**APPENDIX**

It could be argued, however, that Keeling and Whorf's figure 03 [reproduced as figure 02 below] actually points a hiatus period between about 1920 and 1950's as this is the period over which the phase changes between the mean solar sunspot number and the peaks in their temperature anomaly curve:

**Figure 2**

Wilson [6] made a more accurate determination of the times at which the lunar-line-of-nodes aligned with the Earth-Sun line roughly once every 9.3 years {the blue line in figure 3 below] and when the lunar line-of-apse aligned with the Earth-Sun lineonce every 4.425 years [the brown line in figure 3 below]. They then used this to determine the 93 year cycle over which these two alignment cycles constructively and destructively interfered with each other [the red line in figure 3 below]. showing that the period of destructive interference actually extended from about 1920 to 1950's.

**Figure 3**

Finally, Wilson [6] presented some data that showed that there was circumstantial evidence that the 93 year lunar tidal cycle does in fact influence temperature here on Earth.

Wilson [6] found that

*"...when*

*the Draconic tidal cycle is predicted to be mutually enhanced by the*

*Perigee-Syzygy tidal cycle there are observable effects upon the climate variables in the South Eastern part of Australia. Figure 4 below shows the median summer time (December 1st to March 15th) maximum temperature anomaly (The Australian BOM High Quality Data Sets 2010), averaged for the cities of Melbourne (1857 to 2009 – Melbourne Regional Office – Site Number: 086071) and Adelaide (1879 to 2009 – Adelaide West Terrace – Site Number 023000 combined with Adelaide Kent Town – Site Number 023090), Australia, between 1857 and 2009 (blue curve).*

*Superimposed on figure 4 is the alignment index curve from figure 3, (the red line). A comparison between these two curves reveals that on almost every occasion where there has been a strong alignment between the Draconic and Perigee-Syzygy tidal cycles, there has been a noticeable increase in the median maximum summer-time temperature, averaged for the cities of Melbourne and Adelaide. Hence, if the mutual reinforcing tidal model is correct then this data set would predict that the median maximum summer time temperatures in Melbourne and Adelaide should be noticeably above normal during southern summer of 2018/19*."

**Figure 4**

__References__[1] Copeland, B. and Watts, A. (2009), Evidence of a Luni-Solar Influence on the Decadal and Bidecadal Oscillations in Globally Averaged Temperature Trends, retrieved at:

http://wattsupwiththat.com/2009/05/23/evidence-of-a-lunisolar-influence-on-decadal-and-bidecadal-oscillations-in-globally-averaged-temperature-trends/

[2] Wilson, I.R.G. (2016) Do lunar tides influence the onset of El Nino events via their modulation of Pacific-Penetrating MAdden Julian Oscillations?, submitted to the The Open Atmospheric Science Journal.

[3] JPL Horizons on-Line Ephemeris System v3.32f 2008, DE-0431LE-0431 – JPL Solar System Dynamics Group, JPL Pasadena California, available at: http://ssd.jpl.nasa.gov/horizons.cgi, Jul 31, 2013.

[4] Wilson, I.R.G. (2012), Lunar Tides and the Long-Term Variation of the Peak Latitude Anomaly of the Summer Sub-Tropical High Pressure Ridge over Eastern Australia., The Open Atmospheric Science Journal, 6, pp. 49-60.

[5] Keeling, CD. and Whorf, TP. (1997), Possible forcing of global temperature by the oceanic tides. Proceedings of the National Academy of Sciences., 94(16), pp. 8321-8328.

[6] Wilson, I.R.G. (2013), Long-Term Lunar Atmospheric Tides in the Southern Hemisphere, The Open Atmospheric Science Journal, 7, pp. 51-76.

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