Wood ring analysis contains a lot of information about the growth of the tree and the environmental conditions during this growth. In particular, one can determine the age of the tree, the climatic conditions during the growth of the tree, the mechanical stresses that were exerted on the tree as well as the impact of natural or human induced stresses. This master project aims at testing the micro-CT method to identify and analyze the distributional patterns of rings along time for different tree species in relation to climatic changes. This project is conceived as a pilot study with the major aims to: 1) design a methodology to analyze in 3D the tree rings from micro-CT images 2) test this methodology to diagnose the tree rings of selected wood specimens and 3) report on the pros and cons of this methodology in comparison with present practices. This master project is interdisciplinary (tree physiology, tree ecosystem, wood structure, dendrochronology, micro-CT, image analysis) and will be supervised by a team composed of scientists from the UNIGE and EPFL: Philippe Thévenaz (EPFL STI IMT LIB), Charlotte Grossiord (EPFL ENAC IIE PERL), Markus Stoffel (UNIGE, DESTE) and Pascal Turberg (EPFL ENAC IIC PIXE).