The science of tree rings is called dendrochronology. Tree rings help scientists learn about past climates by decoding tree ring patterns. Climate scientists use clues from ice cores, layered sediment deposits in lakes and seas, the structure of coral reefs, as well as tree ring sequences to learn about paleoclimates. The use of tree ring records to decode Earth’s climate history is called dendroclimatology. Use this interactive Tree Rings Simulation by the University Corporation for Atmospheric Research, Center for Science Education to learn what tree ring patterns can tell us about climate conditions in the past.