Experimental methods on tree-ring density of dendrochronology

The invention of the approach of analysis of tree-ring density is of great significance in the study of tree-ring climatology, which greatly imposes a promotion on the development of tree-ring science. This paper introduces the basic principles of empirical methods in the tree-ring density, research findings home and abroad, and detailed experimental methods and processes. It can be determined that in future´s research of the changes of climate and environment, especially in China´s research in chronology of tree rings, the approach of the density analysis and its further development will be of much necessity so as to provide a more detailed information in this respect.