Global mean surface temperature in 2021 will be notably lower than in 2020.
Accurate ●●●●●
“The current La Niña (Figures 4 and 9) is moderately strong, so this year – 2021 – should be notably cooler than 2020.”
- Said on
- 14 January 2021 · Hansen, Sato, Ruedy, Schmidt, Lo, Hendrickson communication "Global Temperature in 2020", 14 January 2021
- Source
- Global Temperature in 2020 · Columbia University (James Hansen mailings)
- Should come true
- 2021
- How sure they sounded
- should
- Categories
- Climate
- Importance
- 2 of 5 · Short-term temperature forecast; matters mainly to climate science.
Outcome
Accurate Happened 31 December 2021.
In NASA GISTEMP v4, 2021 averaged +0.85°C vs 1951-1980, compared with +1.01°C in 2020. That is a drop of about 0.16°C, a notable cooling as forecast.
- https://data.giss.nasa.gov/gistemp/tabledata_v4/GLB.Ts+dSST.txt
- https://berkeleyearth.org/global-temperature-report-for-2021/
History
- 2026-10-17 05:53:38 · created by claude
- 2026-10-17 05:53:38 · categorized by claude
- 2026-10-17 05:53:59 · scored by claude