Today Earth is closest to the Sun (perihelion) near the December solstice, whereas 9,000 years … These are the particles that come from the sun at a high rate of speed and when they pass through the human and the atmosphere, they will cause genetic change in humans and can damage the electronics of the satellite. The very word climate (from Greek klimat, inclination or latitude) originally stood for a simple band of latitude.When scientists began to ponder the possibility of climate change, their thoughts naturally turned to the Sun. ... in which the position of Earth at the equinoxes and solstices changes. A weaker sun could reduce temperatures by half a degree. The Sun’s role in global warming will become clearer as more time passes, as longer data records will be available for study. You may change your wardrobe with the seasons, grabbing a heavy coat in winter, while wearing only a light t-shirt in summer. The Sun so greatly dominates the skies that the first scientific speculations about different climates asked only how sunlight falls on the Earth in different places. When the sun is at its most intense, ozone in the stratosphere absorbs more ultraviolet energy, making areas near the equator warmer than usual. For the first time, model calculations show a plausible way that fluctuations in solar activity could have a … What is the Solar Cycle? The earth does possess an internal energy source, and this can have an effect on weather patterns too, however the amount of energy contained within the planet is tiny in comparison to the amount received from solar radiation. But this distance change is not great enough to cause any substantial difference in our climate. Small changes in the sun's brightness can have big impacts on our planet's weather and climate. Causes of climate change. Effect of The Sun on The Weather Both space weather and terrestrial (Earth) weather—the weather we feel at the surface—are influenced by the small changes the Sun undergoes during its solar cycle. The added heat changes wind patterns, bringing more rain to the western tropics. It needs to be remembered that virtually all climate and weather on this planet comes from the sun. (Figure 1) Based on the data, it is believed that the Sun’s change in radiative forcing (~ 0.09 W/m 2) since the start of industrial era (about 1750) is much less than that of greenhouse gases (~ 2.6 W/m 2) . The simpliest solar cycle definition is: “The solar cycle is the cycle that the Sun’s magnetic field goes through approximately every 11 years.” At the same time, the extra sunlight causes more evaporation off the ocean, which adds to downpours in the western tropics. This is why the Earth's 23.5 degree tilt is all important in changing our seasons. 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