[ 고1 ]_6월 (2019)__[ 23번 ]

Anne 숑 · [고1] 2019 6월 [ 23번 ]

If you’ve ever seen a tree stump, you probably noticed that the top of the stump had a series of rings. These rings can tell us how old the tree is, and what the weather was like during each year of the tree’s life. Because trees are sensitive to local climate conditions, such as rain and temperature, they give scientists some information about that area’s local climate in the past. For example, tree rings usually grow wider in warm, wet years and are thinner in years when it is cold and dry. If the tree has experienced stressful conditions, such as a drought, the tree might hardly grow at all during that time. Very old trees in particular can offer clues about what the climate was like long before measurements were recorded.