I Misunderstood the Greenhouse Effect. Here's How It Works.
Sabine Hossenfelder5 HN recommenders · recommended in 5 months, 2023-2025
989K views · 3 years ago · explainer · evergreen
Sabine Hossenfelder explains how the greenhouse effect actually works, given that infrared is mostly absorbed low in the atmosphere already. She walks through why more CO2 still warms the surface.
Recommended as an accessible, nuanced explanation of the mechanics of global warming, including the saturation puzzle.
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7 comments from Hacker News
Related context: Sabine Hossenfelder's explanation of how the greenhouse effect works -- it's interesting and weird: ▶ this video
This Sabine Hossenfelder video helped me understand stratospheric cooling as a climate change outcome. ▶ this video
See also ▶ this video And note that if you think "Maybe we shouldn't be worried until we understand this" In the past ~14 months things have taken off in ways that nobody who studies this stuff can fully explain yet (leading theory: cleaner fuel -> less sulfur dioxide forcing). We're 4 to 5 standard deviations from the 30-year mean in sea surface temperature right now. link The half of the human population that lives in South, East, and Southeast Asia have been under oppressive heatwaves in the past few days that have taken a sizable death toll. link The USDA just adjusted its planting map using 2022 data and indicated that average winter low temperatures in the US have risen 2.5 degrees over the past 10 years, and continue to rise. It's looking like extreme wet bulb events and the peripheral consequences of extreme wet bulb events are going to be perhaps the biggest consequence of failing to control CO2 emissions, as the estimate of survivable wet bulb temperatures have been revised down, their importance has been revised up, and the number of outlier heatwaves have ticked up (Vancouver? Really?!). Less sea level rise, less crop failures from weather pattern changes, less hurricanes. Billions of people who come to recognize that an unluckily sunny August week without a breeze can kill a majority of the local population, are going to want to mitigate that risk. Heat pump air conditioning & insulated housing for every single temperate & tropical human residence would work as an
For anyone who's curious, here's an explanation of how the greenhouse effect works -- it's not just that some infrared radiation escapes from earth to space, while some other infrared radiation gets trapped. ▶ this video
This is good news, somehow. Here is how the earth 'greenhouse effect' really works: ▶ this video This is why Co2 do not have any effect until it reaches the high troposphere. That takes 20 years. The average climate we have right now is caused by emissions from 2003. I'll repeat that in the comments of every climate article I read by the way, sorry for the repetition. M
If you are confused as to why this is a bad thing this video explains the mechanics of global warming in a way anybody can understand. ▶ this video
I'd recommend watching this video if you'd like to know the more nuanced story behind climate change: ▶ this video I am not qualified at all to really comment on it but this did open my eyes to how confusing the entire thing is.