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He began looking at the annual growth rings of trees and noticed a relationship between the size of the growth rings and climate factors such as moisture and elevation.He plotted the width of tree rings and compiled the first chronologies to show how trees record climate changes through time. As a young astronomer working at the Lowell Observatory in Arizona, Douglass had a particular interest in the sun, especially the cyclic behavior of sun spots and how the sun influences weather. Douglass founded the science of dendrochronology— the technique of dating events, environmental change, and archaeological artifacts by using the characteristic patterns of annual growth rings in timber and tree trunks.For example, Volcano munching was a topic of conversation a concept we which were not aware.More coring – Nick then took the group to the wood shop and lab.
Where do tree-ring scientists travel to to find suitable trees? What techniques can be used to prepare and analyze tree core samples to reveal the nature of past climate? Finding Climate Sensitive Trees Conducting tree-ring science isn't as simple as it might first appear.
If there is concern for a particular group of trees, scientists can dip their tree borers into alcohol to be sure they are not spreading any diseases from tree to tree.