The Original and the Reversed Milankovitch Cycles comparison
This is the Reversed Milankovitch Cycle:
"The modern interpretation of Milankovitch’s work is that you get an interglacial when enough energy reaches 65N latitude in Summer to melt the snow. Without the snow albedo drops and enough heat is retained to keep it warm. A glacial period starts when too little heat reaches 65N in Summer to melt the snow. Over years the snow builds up into ice sheets and the increased ice albedo keeps it cold.”
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What really happens is that you get an interglacial when enough energy reaches 65 SOUTH latitude in Southern Hemisphere Summer to accumulate the solar energy in the oceanic waters.
In our times the Southern Hemisphere’s summer COINCIDES with the earth’s PERIHELION.
That is why Earth is in a WARMING TREND PHASE now. Milankovitch had calculated his cycle in high preciseness. The only difference is:
Milankovitch Cycle should be read REVERSED.
Milankovitch Cycle should be read Reversed !
Milankovitch Cycle should be read Reversed !
Of course climate changes.
And of course the planet's rotational spin is almost constant.
Also Earth has a very thin atmosphere; Earth has a very small greenhouse phenomenon in its atmosphere and it doesn’t warm the planet.
The cause of climate change is not the Earth's atmosphere. The cause of climate change is orbital.
Milutin Milankovitch has explained everything 100 years ago.
The ( Ṃ ↓ ) represents the Original Milankovitch Cycle grapheme.
And the ( Ẇ ↑ ) represents the Reversed Milankovitch Cycle grapheme.
( Ṃ ↓ ) - supposedly this is the Original Milankovitch Cycle. Please take notice of the dot under ( Ṃ ↓ )
The dot's position represents the present time, when Planet Earth is in Original Milankovitch Cycle Minima:
The Original Milankovitch Cycle shows a cooling trend.
( Ẇ ↑ ) - and this is the Reversed Milankovitch cycle. Please take notice of the dot above ( Ẇ ↑ )
The dot's position represents the present time, when Planet Earth is in Reversed Milankovitch Cycle Maxima:
( Ẇ ↑ ) The Reversed Milankovitch Cycle shows a warming trend.
Milankovitch had to reverse his cycle to match the instrumental data. But he didn’t have a time.
It was a critical mistake in Milankovitch’s assumptions.
Now it is time for us to make the necessary correction. 100 years have passed, Milankovitch agrees, if it is necessary, for us to make a correction.
Right now Planet Earth is in an orbital forced warming trend. And these are culmination times.
The very slow warming trend will continue for about a 1,5 millennia on. Then slowly and gradually the Global Temperatures will become cooler.
The ( Ṃ ↓ ) represents the Original Milankovitch Cycle grapheme.
And the ( Ẇ ↑ ) represents the Reversed Milankovitch Cycle grapheme.
Milankovitch Cycle should be read Reversed !
The dot's position represents the present time warming trend, when Planet Earth is in Reversed Milankovitch Cycle Maxima: ( Ẇ ↑ )
At present Perihelion occurs in the middle of the Southern Hemisphere summer.
At present Perihelion occurs in the middle of the Northern Hemisphere winter. Consequently at present Perihelion occurs in the middle of the Southern Hemisphere summer.
In the summer Earth's axis tilts toward sun. At Perihelion Earth receives 7% more intense sunlight than at the Aphelion.
This is because the Earth's orbit is not circular but elliptical, with the Sun located in one of the foci of the ellipse.
When we apply Stefan-Boltzmann Law we come to conclusion that at present, when Perihelion occurs in the middle of the Southern Hemisphere summer, Earth absorbs more solar energy and that leads to orbital forced warming trend.
It happens because North and South Hemispheres have an unequal distribution of land and oceanic surfaces.
The Southern Hemisphere is mostly covered with oceans (water) and the Northern Hemisphere is crowded with continents (soil).
As a result there is a major difference in each Hemisphere surface qualities. The surface is what interacts with incoming solar flux.
cp. ocean = 1 cal /gr oC
cp. land = 0,19 cal /gr oC
Let's apply the Rotating Planet Surface Solar Irradiation Absorbing-Emitting Universal Law:
Jemit = σΤe⁴/(β*N*cp)¹∕ ⁴ (W/m²)
We can see now that when insolated, the land emits more intensively IR radiation back to space than the ocean does.
It is just happening that way at present. When Southern Oceans are tilted towards sun Earth is at Perihelion (at closest to sun position).
At present more intense insolation (+7%) falls on oceanic waters. That leads to orbital forced global warming trend.
It all happens according to Reversed Milankovitch Cycle.
And it happens according to Stefan-Boltzmann Law.
And of course the average global insolation remains reasonably constant.
And Jabs = [ Φ (1-a) So /4 ] (W/m²)
What changes in the time is the Earth's surface IR radiation intensity.
That is why I say there is an orbital forced Global Warming Trend.
This is the 21.170 years Milankovitch Cycle. Only the Milankovitch Cycle should be read Reversed !
Axial precession is the movement of the rotational axis of Earth
What I have to complement is about the axial precession.
Axial precession is the movement of the rotational axis of Earth. According to the Milankovitch Cycle, precession has a cycle of roughly 21.170 years.
It is moving 1day every 58 years.
So we have 365 days * 58 years/day = 21.170 years
Precession doesn’t change the total amount of solar radiation that hits Earth.
But precession primarily alters the perihelion and aphelion.
Overall, this increases the seasonal differences from one hemisphere to the other.
The warming trend we observe now started some 6.500 years ago. It is a very slow process. The MWP ( the Medieval Warm Period ) is a confirmation of the existence of a long warming trend.
The LIA ( the Little Ice Age ) was observed as a colder atmosphere and more snowy winters. Also the glaciers were increasing.
On the other hand oceans continued accumulating heat.
It is a very long cycle. We are observing the Reversed Milankovitch Cycle culmination period. It will last about a millennia and a half and then there will be a cooling trend.
It is a culmination phase phenomenon.
It is similar to the common Solstice we observe every year.. Around Solstices the day is almost the same, only very tiny changes can be observed. It is a culmination time of a year. When day stops getting shorter and then it starts getting longer. A very slow and small changes can be observed.
The same with the 7.500 years long warming trend. It comes to its culmination now. First it will stop to get warmer, and then very slowly it will change to a cooling trend.
But as I have said it is a very long and a very slow process. It will take some 1.500 years to complete.
That is why I say there is an orbital forced Global Warming Trend.
It is the 21.170 years long Milankovitch Cycle.
Only the Milankovitch Cycle should be read Reversed !
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What Earth's surface does, is to still emerging from an ice age!
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https://www.cristos-vournas.com
The faster a planet rotates (n2>n1) the higher is the planet’s average (mean) temperature T↑mean:
Tmin↑→ T↑mean ← T↓max