Inverse dendroecological modelling : a new approach to paleoclimate reconstruction from multi-proxy tree ring archives (original) (raw)
Over the last decades, the set of mathematical rules representing the many ecophysiological processes that occur within trees were incorporated into various dendroecological models (eg. MAIDENiso). Such models use simple meteorological variables (precipitation, temperature, CO2) and simulate tree growth parameters that may be readily compared to observations (tree ring widths, stable isotope ratios). Here, we present a novel paleoclimate reconstruction method that uses such ecophysiological model, but in an inverse mode, ie. observed dendroecological variables are used as inputs and climatic variables are retrieved as outputs to produce reconstructions that have strong and sound ecophysiological basis. This novel method represents a significant scientific advance comparing to more conventional (regression-based) transfer function that cannot take into account the array of causal processes linking tree growth to climate. We tested our method on a dataset originating from the Fontaine...
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