1、 What is the denser side of the tree rings

Generally speaking, the tree rings are denser towards the shady side, that is, to the north. Because a ring is the growth of a big tree in a year, and whether the big tree grows well or not depends on the light conditions. For big trees, the illumination conditions towards the south are certainly better than those towards the north, so the growth of big trees towards the south is stronger than those towards the north, and the growth rings towards the south are wider than those towards the north

2、 What can the rings tell us

1. Looking direction: the tree rings are wide and narrow. The wide and sparse side of the rings indicates that the tree is growing well towards the sunny side, that is, to the south. The narrow and dense side of the ring indicates that the growth of the tree is poor, facing the shady side, that is, the north

2. Look at the age: a ring is the growth of a big tree in a year. We can judge how many years a big tree has lived by looking at the number of rings. However, if the temperature drops sharply in a year and then rises again, there are likely to be two rings in that year

3. Look at the climate: the rings of big trees are wide and narrow. If a big tree has many narrow rings, it suddenly has a very wide ring. It shows that at the beginning, the local environmental and climatic conditions were poor and the trees grew slowly. Later, the climate was suitable and the trees grew rapidly, resulting in a wide ring