Calm down, all is well in the universe !
NASA: Climate Change caused by Changes in Earth’sSolar Orbit and Axial Tilt – Not by Cars and Fossil Fuel
For more than 60 years, the National Aeronautics and Space Administration (NASA) has known that the changes occurring to planetary weather patterns are completely natural and normal. But the space agency has chosen to let man-made Climate Emergency to go on and let “Persons or Its” Explore the truth for themselves knowing the sheeple Believe everything the Newsman says as Gospel truth and that news Man is Puppet controlled by the Globalist Media.
It will very enjoyable in the next couple of years when the Sheeple find out Climate Change was all a Hoax “Egg on their face” and we can all Laugh at them for been so dumb and hopefully it will teach young people to read books and do some research.
The Serbian astrophysicistMilutin Milankovitch is best known for developing one of the most significanttheories relating Earth motions and long-term climate change. Born in 1879 inthe rural village of Dalj (then part of the Austro-Hungarian Empire, todaylocated in Croatia), Milankovitch attended the Vienna Institute of Technologyand graduated in 1904 with a doctorate in technical sciences.
A portrait of Milutin Milankovitch. (Drawing by Hailey King)
After a brief stint as thechief engineer for a construction company, he accepted a faculty position inapplied mathematics at the University of Belgrade in 1909—a position he heldfor the remainder of his life.
Milankovitch dedicated hiscareer to developing a mathematical theory of climate based on the seasonal andlatitudinal variations of solar radiation received by the Earth. Now known asthe Milankovitch Theory, it states that as the Earth travels through spacearound the sun, cyclical variations in three elements of Earth-sun geometrycombine to produce variations in the amount of solar energy that reaches Earth:
1. Variations in the Earth’sorbital eccentricity—the shape of the orbit around the sun.
2. Changes in obliquity—changesin the angle that Earth’s axis makes with the plane of Earth’s orbit.
3. Precession—the change in thedirection of the Earth’s axis of rotation, i.e., the axis of rotation behaveslike the spin axis of a top that is winding down; hence it traces a circle onthe celestial sphere over a period of time.
Together, the periods of theseorbital motions have become known as Milankovitch cycles.
Orbital Variations
Changes in orbital eccentricity affect the Earth-sun distance. Currently, a difference of only 3 percent (5 million kilometers) exists between closest approach (perihelion), which occurs on or about January 3, and furthest departure (aphelion), which occurs on or about July 4. This difference in distance amounts to about a 6 percent increase in incoming solar radiation (insolation) from July to January. The shape of the Earth’s orbit changes from being elliptical (high eccentricity) to being nearly circular (low eccentricity) in a cycle that takes between 90,000 and 100,000 years. When the orbit is highly elliptical, the amount of insolation received at perihelion would be on the order of 20 to 30 percent greater than at aphelion, resulting in a substantially different climate from what we experience today.Obliquity (change in axial tilt)
As the axial tilt increases, the seasonal contrast increases so that winters are colder and summers are warmer in both hemispheres. Today, the Earth’s axis is tilted 23.5 degrees from the plane of its orbit around the sun. But this tilt changes. During a cycle that averages about 40,000 years, the tilt of the axis varies between 22.1 and 24.5 degrees. Because this tilt changes, the seasons as we know them can become exaggerated. More tilt means more severe seasons—warmer summers and colder winters; less tilt means less severe seasons—cooler summers and milder winters. It’s the cool summers that are thought to allow snow and ice to last from year-to-year in high latitudes, eventually building up into massive ice sheets. There are positive feedbacks in the climate system as well, because an Earth covered with more snow reflects more of the sun’s energy into space, causing additional cooling.On the Shoulders of Giants
Milutin Milankovitch
Orbital Variations
Milankovitch Theory
Links and ReferencesLeft: The eccentricity of the Earth’s orbit changes slowly over time from nearly zero to 0.07. As the orbit gets more eccentric (oval) the difference between the distance from the Sun to the Earth at perihelion (closest approach) and aphelion (furthest away) becomes greater and greater. Note that the Sun is not at the center of the Earth’s orbital ellipse, rather it is at one of focal points.
Note: The eccentricty of the orbit shown in the lower image is a highly exaggerated 0.5. Even the maximum eccentricity of the Earth’s orbit—0.07—it would be impossible to show at the resolution of a web page. Even so, at the current eccentricity of .017, the Earth is 5 million kilometers closer to Sun at perihelion than at aphelion. (Images by Robert Simmon, NASA GSFC)
1 Precession
Changes in axial precession alter the dates of perihelion and aphelion, and therefore increase the seasonal contrast in one hemisphere and decrease the seasonal contrast in the other hemisphere.Left: The change in the tilt of the Earth’s axis (obliquity) effects the magnitude of seasonal change. At higher tilts the seasons are more extreme, and at lower tilts they are milder. The current axial tilt is 23.5°. Image by Robert Simmon, NASA GSFC)
2 Left: Precession—the change in orientation of the Earth’s rotational axis [this can be seen more clearly in an animation (small (290 kB QuickTime) or large (1.2 MB QuickTime))]—alters the orientation of the Earth with respect to perihelion and aphelion. If a hemisphere is pointed towards the sun at perihelion, that hemisphere will be pointing away at aphelion, and the difference in seasons will be more extreme. This seasonal effect is reversed for the opposite hemisphere. Currently, northern summer occurs near aphelion. (Image by Robert Simmon, NASA GSFC)
Using these three orbital variations, Milankovitch was able to formulate a comprehensive mathematical model that calculated latitudinal differences in insolation and the corresponding surface temperature for 600,000 years prior to the year 1800. He then attempted to correlate these changes with the growth and retreat of the Ice Ages. To do this, Milankovitch assumed that radiation changes in some latitudes and seasons are more important to ice sheet growth and decay than those in others. Then, at the suggestion of German Climatologist Vladimir Koppen, he chose summer insolation at 65 degrees North as the most important latitude and season to model, reasoning that great ice sheets grew near this latitude and that cooler summers might reduce summer snowmelt, leading to a positive annual snow budget and ice sheet growth.
But, for about 50 years, Milankovitch’s theory was largely ignored. Then, in 1976, a study published in the journal Science examined deep-sea sediment cores and found that Milankovitch’s theory did in fact correspond to periods of climate change (Hays et al. 1976). Specifically, the authors were able to extract the record of temperature change going back 450,000 years and found that major variations in climate were closely associated with changes in the geometry (eccentricity, obliquity, and precession) of Earth’s orbit. Indeed, ice ages had occurred when the Earth was going through different stages of orbital variation.
Since this study, the National Research Council of the U.S. National Academy of Sciences has embraced the Milankovitch Cycle model.
…orbital variations remain the most thoroughly examined mechanism of climatic change on time scales of tens of thousands of years and are by far the clearest case of a direct effect of changing insolation on the lower atmosphere of Earth (National Research Council, 1982).
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This is part of what my brilliant father explained in the 90s and convinced with FACTS, I have advocated ever since. The dramatic change in ecliptic tilt during cyclical periods 7k, 11k & 22,000 years also makes for equal and opposite variable hot colder changes to surface, mid and deep ocean currents circulating the boundaries of continents affecting climate as well.
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