Central England temperature series 1770-1840. The length of the cooling effect of the Tambora 1815 eruption is indicated by the blue bar. These graphs have been prepared using the composite monthly meteorological series since 1659, originally painstakingly homogenized and published by the late professor Gordon Manley (1974). From http://www.climate4you.com/ClimateAndVolcanoes.htm where links to the original data can be found.
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