3 ms·
>Human-induced warming reached approximately 1°C (likely between 0.8°C and 1.2°C) above pre-industrial levels in 2017 . source: IPCC https://www.ipcc.ch/sr15/c
by nabla9 3y ago
>Human-induced warming reached approximately 1°C (likely between 0.8°C and 1.2°C) above pre-industrial levels in 2017 . source: IPCC https://www.ipcc.ch/sr15/chapter/chapter-1/ https://www.ipcc.ch/sr15/chapter/chapter-1/
Annual records are
2016 1.01°C
2020 1.02°C
Source: https://climate.nasa.gov/vital-signs/global-temperature/ https://climate.nasa.gov/vital-signs/global-temperature/
I reverse the question. 𝗛𝗼𝘄 𝗰𝗮𝗻 𝗼𝗻𝗲 𝗰𝗼𝗻𝘁𝗶𝗻𝘂𝗲 𝘁𝗼 𝗵𝗮𝘃𝗲 𝗺𝗶𝘀𝘁𝗿𝘂𝘀𝘁 𝗶𝗻 𝘁𝗵𝗲 𝘀𝗮𝗺𝗲 𝘄𝗮𝗿𝗻𝗶𝗻𝗴𝘀 𝗻𝗼𝘄?
- marcus_holmes 3y agoI read that as the warning was that the temperature would rise by 1 to 7 degrees during the next 30 years (i.e. 1989-2019), not since ~1850. It has definitely risen by >1 degree since ~1850, but most of that had already happened by 1989.
- nabla9 3y agoThese scenarios are based on the "The Business-as-Usual" assumption that is not 100% valid. In IPCC 1990 business-as-usual scenario C02 emissions are roughly 45 Gt today, in reality, it's 37 Gt. Probably the most important factor is that coal use has not increased to the levels predicted, because actions have been taken in the last decade or so.