The analysis of tree rings leads to multiple information on trees and on their environment. 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 project aims at testing the micro-CT method to identify and analyze the distributional patterns of rings for different tree species in relation to climatic changes. This goal of this project is to design and to implement an image-analysis pilot with the major aims to: 1) design a methodology to analyze the tree rings from micro-CT images 2) test this methodology on the tree rings of selected tree specimens and 3) report on the pros and cons of this methodology in comparison with present practices. This project is interdisciplinary and will be supervised by a team composed of scientists from the UNIGE and EPFL: Charlotte Grossiord (EPFL ENAC IIE PERL), Markus Stoffel (UNIGE, DESTE), Daniel SAGE (EPFL STI IMT LIB) and Pascal Turberg (EPFL ENAC IIC PIXE).