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by Novice (980 points)
While it seems that we are currently in a solar maximum, it doesn't seem to be why it is so hot. It looks like global warming is more likely the reason why it has been getting hotter, as it says on NASA's official website

https://science.nasa.gov/climate-change/faq/is-the-sun-causing-global-warming/
False
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by Newbie (400 points)
It is true that we are currently in solar maximum, and solar irradiance is closely correlated with surface temperatures on earth. According to Nasa, the sun undergoes a cycle every 11 years, in which the amount of solar irradiance on earth shifts by 1-1.5 watts per square meter between peak and valley, which accounts for about a 0.2-0.3 degrees celcius change in surface temperature. So this summer may be a little bit hotter than the last summer, but will be 0.2-0.3 degrees C hotter than summers 11 years ago. Again this is just on a planetary scale, the shift from El Niño to La Niña this summer will likely cause the next few years to be cooler than the last few for North America. Human caused climate change, resulting from the release of greenhouse gasses into the atmosphere has also caused about 1degrees C of heating over the last 100 years. In conclusion that claim that the solar peak will cause this summer to be hotter than one's 10 years ago is mostly true, the claim that this summer will be much hotter than last years is exaggerated/missleading, and the claim that the solar cycle is in fact responsible for the measured increase in temperature over that last 100 years, commonly referred to global warming is liar liar pants on fire false.

Sources: https://science.nasa.gov/resource/graphic-temperature-vs-solar-activity/

https://wmo.int/news/media-centre/wmo-update-predicts-60-chance-of-la-nina#:~:text=Latest%20forecasts%20from%20WMO%20Global,conditions%20during%20September%2DNovember%202024.
Exaggerated/ Misleading

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