Not exact matches
When internal variability is filtered from the smoothed observed temperature (solid black line), the cleaned
signal (dashed line) shows nearly
monotonic warming throughout the 20th Century.
Fig. 3 shows that the resulting cleaned
signal presents a nearly
monotonic warming of the global mean surface temperature throughout the 20th century, and closely resembles a quadratic fit to the actual 20th century global mean temperature.
Removal of that hidden variability from the actual observed global mean surface temperature record delineates the externally forced climate
signal, which is
monotonic, accelerating
warming during the 20th century.