This research paper is the first time that a tipping point of a switch from a carbon sink to a carbon emission source in tropical rainforests has been identified clearly – not just for one year but for the last 20 years. Cause is a change in the local climate.
www.theguardian.com/environment/...
Australian tropical rainforest trees switch in world first from carbon sink to emissions source
Researchers say carbon emissions change in Queensland tropical rainforests may have global climate implications