How to read tree rings the color and width of tree rings can provide snapshots of past climate condition
Hallo steemian's I want to tell you about weathe changes and tree rings
One way that scientists use trees to learn about past climate is by studying a tree' s rings. If you' ve ever seen a tree' stump,you probably noticed that the top of the stump had a series of rings. It looks a bit like a bullseye. 
These rings can tell us how old the tree is, and what the weather was like during each year of the tree' s life. The light-colored rings represent Wood that grew in the spring and early summer, while the dark rings represent wood that grew in the late summer and fall. One light ring plus one dark ring equals one 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 year and they 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 in those years. 
Scientists can compare modern trees with local measurements of temperature and precipitation from the nearest weather station.However,very old trees can offer clues about what the climate was like long before measurements were recorded.
