Measurements of Surface Temperature and Sun’s Energy

Measurements of Surface Temperature and Sun’s Energy

Changes in the global surface temperature (top) and the solar flux (bottom) since 1900 (temperatures are relative to 1961-1990; solar flux is relative to the total average irradiance from the sun of about 1360 watts per square meter). The temperatures are based on thermometer observations of the Earth’s surface temperature, while the solar flux at the top of Earth’s atmosphere is based on satellite observations starting in 1978 and on proxy observations before then. (Figure source: NOAA NCDC / CICS-NC).

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Physical Climate, Observations, Energy