World Now Likely to Hit Watershed 1.5 °C Rise in Next 5 Years

Re:World Now Likely to Hit Watershed 1.5 °C Rise in Next 5 Y... by PragmaticPulp on Thursday May 27, 2021 @01:15PM (#27305483)

Related fun fact: The sun was also 4-5% dimmer during this period.

It's not relevant to the sharp increase in CO2 concentrations we've seen in the past century.

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Re:World Now Likely to Hit Watershed 1.5 °C Rise in Next 5 Y... by onlyrealcuzzo on Thursday May 27, 2021 @01:32PM (#27305720)

Is the Sun only getting brighter, and if so, is it changing at a pace that would even have a noticeable impact in, say, 1000 years?

I saw on Google that it gets 6% brighter every 1 Billion years. That's a really long time, and I'm not sure what that even means anyway.

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Re:World Now Likely to Hit Watershed 1.5 °C Rise in Next 5 Y... by PragmaticPulp on Thursday May 27, 2021 @01:55PM (#27306017)

> I saw on Google that it gets 6% brighter every 1 Billion years. That's a really long time, and I'm not sure what that even means anyway.

For our current situation, it means nothing.

The grandparent comment was referring to a period 100s of millions of years ago. Given that the sun's intensity has changed significantly on that scale, it's not appropriate to compare our current situation to that of something that happened 100s of millions of years ago.

For what it's worth, the atmospheric CO2 reduction that followed that period was associated with significant cooling and glaciation, which is further evidence that CO2 is a significant factor in determining global climate change. The grandparent comment was very disingenuous.

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