Have we forgotten about the Sun for some reason?

How the Sun Affects Climate

It is very noticeable than when the merchants of fear seek to terrify everybody about climate change and global warming, latching on to every nuance of the weather or the hurricane season or forest fires as “proof” of our immanent doom, two important and highly relevant factors that affect changes in the climate are more or less ignored. They are outlined briefly in the article below.

So we have the muddle, fudge and downright dishonesty of much of climate “science” and an overstatement of the greenhouse properties of CO2 combined with an ignoring of important factors such as the cycles of solar activity, sunspots and so forth in order to create the maximum terror effect.

Whilst this evidently politically driven campaign to scare the living daylights out of everyone leaves a new generation of kids understandably terrorised into believing they have no future, we are left with a kind of hysteria with no accurate, reasoned understanding of the exact effect of human activity, the degree of it and the ways, if any, it combines with natural warming and cooling influences such as the activity of the sun.

How the Sun Affects Climate: Solar and Milankovitch Cycles

Earth gets all its energy from the Sun and it is the Sun’s energy that keeps Earth warm. But the amount of energy Earth receives is not always the same. Changes in the Sun and changes in Earth’s orbit affect the amount of energy that reaches the Earth.

The 11-Year Solar Cycle
When the Sun has fewer sunspots, it gives off less energy, less energy makes its way to Earth, and our planet cools down. More than three hundred years ago, when the climate was cooler for a time called the “Little Ice Age”, people noticed there were no sunspots for several decades. Over time, scientists have noticed a pattern in the number of sunspots. About every 11 years the number of sunspots reaches a high and then decreases again.

Milankovitch Cycles
Over thousands of years, changes in Earth’s orbit cause changes in the amount of the Sun’s energy that gets to the planet. Over the past several million years these changes have caused cycles of global warming and cooling.

There are three ways that Earth’s orbit changes over time.

  • Eccentricity: The shape of Earth’s orbit around the Sun becomes slightly more and then less oval every 100,000 years.
  • Precession: Earth wobbles on it axis as it spins, completing a full wobble every 23,000 years.
  • Tilt: The angle of the Earth’s axis relative to the plane of its orbit changes about three degrees every 41,000 years.

Once the Sun’s energy reaches the Earth, several things can happen. The energy can be absorbed by the planet, reflected back into space, or become trapped in the atmosphere.


The above article is from Windows to the Universe. Visit Windows to the Universe for more great articles



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About Steve Cook 2246 Articles
Director, UK Reloaded

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