While the Sun does affect climate, it is not responsible for global warming. There are solar cycles in which the Sun’s activity changes and that has an effect on energy distribution throughout the Earth. When the Sun is at a maximum, it increases high-energy radiation, which leads to an increase in the amount of ozone in the upper atmosphere. As a result, the upper atmosphere gets warmed up and the winds are affected all the way from the stratosphere to the Earth’s surface. As a result, climate patterns change.
Even though climate patterns are affected by the Sun, these changes are insignificant compared to warming created by human emissions. According to NASA research, “the solar increases do not have the ability to cause large global temperature increases.” The graph below compares the global temperature to solar irradiance. It shows that even when solar irradiance goes down, temperature keeps increasing, proving that the Sun is not the culprit of global warming.
Resources:
https://climate.nasa.gov/blog/2910/what-is-the-suns-role-in-climate-change/
http://solar-center.stanford.edu/sun-on-earth/FAQ2.html
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