One of Europe’s oldest temperature series goes back 300 years: Berlin-Dahlem.

Cyclic behavior. Source: Free University of Berlin/Wikipedia

Readers will note the mean temperatures were warmer than they are today. The 1990s and 2000s were in the mid 1800s.

Moreover, the long-term trend was downward from 1760 to 1990, despite atmospheric CO2 having rising since 1850.

Hat-tip: Klima.Wissen.

via NoTricksZone

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March 1, 2020 at 01:47PM