Tree ring samples in laboratory for chemical analysis (IMAGE)
Caption
The carbon isotopes in trees indicate changes in carbon assimilation for a given year, which in the UK relates to the amount of summer sunshine. The oxygen and hydrogen isotopes record information on the water used by the tree which indicates the amount of summer rainfall and changes in large-scale atmospheric circulation. This evidence from the wood’s chemical signature will enable researchers to date the past and to reconstruct summer climate through time.
Credit
UK Oak Project: Swansea University/Oxford University
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