OBJECTIVE FORESTRY

Detailed explanation-1: -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 they are thinner in years when it is cold and dry.

Detailed explanation-2: -“But to oversimplify: a warmer atmosphere can hold more water vapor, and an atmosphere with more water vapor can make more precipitation.” In parts of the world where the factor currently limiting the amount of precipitation is water vapor, a warmer world means more precipitation.

Detailed explanation-3: -The cambium cells on the outside become part of the tree’s phloem, a band of inner bark through which the tree’s food supply moves. The cambium cells on the inside become the xylem, a system of tiny tubelike cells that carry the tree’s water supply. These xylem layers give us the annual rings.