The World Meteorological Organization recommends updating the 30-year period of climate normals every ten years. A side-by-side comparison of ten successive maps of 30-year average annual temperatures for the continental U.S. shows how these 30y normals are warming.
https://www.climate.gov/news-features/understanding-climate/climate-change-and-1991-2020-us-climate-normals
https://www.climate.gov/news-features/understanding-climate/climate-change-and-1991-2020-us-climate-normals
Comments
- Warmest 10 years, were the last 10 years
- All SSP models in IPCC-AR6-SPM-pg-22 suggest warming continues until at-the-very-least 2040
Isn't the 30-year-average a bit last-century?
Surely the climate we're interested in is "what weather to expect", rather than what we once had ?