The comparison between our reconstruction and Manley mean growing season temperature data provides an independent control of the quality of CET data. We compare our data with a number of independent temperature estimates for Europe and the Northern Hemisphere. We are able to assess this uncertainty, which is not the case for many documentary sources (diaries etc.), and even not the case for early instrumental temperature data. We have estimated an uncertainty of 0.55☌ on individual growing season maximum temperature reconstructions. Our reconstruction is expected to provide a reference series for the variability of growing season temperature (from April to September) in Western Europe from 1596 to 2000. In this study, we have combined a Burgundy grape harvest date record with new δ18O measurements conducted on timbers and living trees cellulose from Fontainebleau castle and forest.
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December 2022
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