«Our results indicate that since 1963, drought - induced water stress has led to a weakening of the biomass carbon sink across a large area of the western Canadian boreal forest, with the largest reduction occurring after 2000,» the authors write, only to warn that «western Canada's boreal forests may become net carbon sources if the climate change — induced droughts continue to intensify.» (news.mongabay.com)
In time, the emissions are projected to overtake the ability of forests to contain them and, as he put it, «it is thought that the region will switch from a net carbon sink to a net carbon source sometime this century.» (scientificamerican.com)
The title of the paper is «Tropical forests are a net carbon source based on above - ground measurements of gain and loss ``. (ecoshock.org)