Temperature Measurements 1850 - 2019

PawPlot - P.Duinker

The horizontale line through 0.0 agrees very well with 14.0 °Celsius. The title of the figure and the legends are clickable and lead to additional information. For a pdf-file of the graph click here.

The figure shows the average yearly land-ocean temperature changes from 1850 up to the present as measured by five large data centres as indicated. The temperature differences – plotted along the vertical axis – are calculated with respect to the average temperature of the thirty year time interval 1951 - 1980.

The agreement of the analyses performed in the UK, Japan and the US is pretty good. Well known phenomena like El Niño's (the most recent ones in 1991-92, 1994-95, 1997-98, 2002-03, 2004-05, 2009-10 and 2015-16), the subsequent La Niña's and the larger volcanic effects - like the the Krakatau explosion in 1883 and the Pinatuba in 1991 - are observed by all. A significant rise over the whole period is undeniable.

In the following pages the data after 1981 are compared with climate calculations published in 1981 and 1988 with and without future CO₂ effects in order to test their predictive power. For a summary and conclusion click here.