after-figs6b_clean-darkened-web.jpg

The growth of forest trees in temperate and boreal regions became more limited by water rather than temperature as the 20th century warmed. The more orange-red the area on the map, the more trees in that region became limited by water availability. (Image: Flurin Babst, Swiss Federal Research Institute WSL) The growth of forest trees in temperate and boreal regions became more limited by water rather than temperature as the 20th century warmed. The more orange-red the area on the map, the more trees in that region became limited by water availability.