The humble bucket turns out to be at the bottom of a perplexing anomaly in the climate records for the twentieth century. The time series of land and ocean temperature measurements, begun in 1860, shows a strange cooling of about 0.3 Celsius in the global mean temperature in 1945, relative to the 1961–90 average. The sharpness of the drop stands out even more if the signatures of internal climate variability, such as those associated with El Nino events, are filtered from the record. (source: nature.com)
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