Oxygen-18 in the water of plants and evaporating pans, in organic matter and in the carbon dioxide exchanged by plants

    Project: Research

    Project Details

    Description

    Oxygen isotopes in tree rings can be used to determine changed climatic conditions, but are also modifies by physiological processes. We have shown that pan evaporation rates are going down around the world and that it is linked to global dimming. However data are sparse and spatially variable. The proposal is to examine tree ring isotopes from trees where pan evaporation and radiation have been recorded and a hoped-for outcome is a biological surrogate for pan evaporation. Oxygen isotopes in CO2 are used to partition biospheric CO2 fluxes, and to examine vegetation and climate change from the atmospheric record. The project will study plant effects on the isotopic composition of CO2, leading to more accuracy in such analyses.
    StatusFinished
    Effective start/end date1/01/0531/12/07

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