Something in the air prevents much sunlight…

Something in the air prevents much sunlight from reaching the ground and arrests global tree growth for almost two full decades until 1140 BCE.

One proposed cause is the Hekla 3 eruption of the Hekla volcano in Iceland.

The result in Egypt will be a substantial increase in grain prices under the later reigns of Ramesses VI–VII, whereas the prices for fowl and slaves remain constant.

Thus the cooldown affects Ramesses III's final years and impairs his ability to provide a constant supply of grain rations to the workmen of the Deir el-Medina community.