Dendroclimatology is the study of climate variability and change based on analysis of tree rings. Trees form annual rings that can provide information on past climate conditions, such as temperature and precipitation patterns. By examining the width, density, and composition of tree rings, researchers can infer historical climate conditions and patterns. Dendroclimatology is an important tool for understanding long-term climate trends and variability, as well as for reconstructing past climate conditions before the availability of instrumental records.