1860 to 1875 = average temperature up for 15 years
1875 to 1890 = down for 15 years
1890 to 1903 = up for 13 years
1903 to 1918 = down for 15 years
1918 to 1941 = up for 23 years
1941 to 1976 = down for 35 years
1976 to 1998 = up for 22 years
1998 to date = down for 16+ years so far
1890 to 1903 = up for 13 years
1903 to 1918 = down for 15 years
1918 to 1941 = up for 23 years
1941 to 1976 = down for 35 years
1976 to 1998 = up for 22 years
1998 to date = down for 16+ years so far
Notes:
- 1860 to 1978 were measured using non-global surface thermometers
- 1979 and after were measured using global, and much more accurate, weather satellites
- 1979 and after were measured using global, and much more accurate, weather satellites