Death by 1,000 Cuts: Why the Forest Carbon Sink Is Disappearing

GR:  While we’re on the subject, here’s more evidence that deforestation is not stopping anytime soon. The research reported below found that 69% of deforestation came from small-scale projects.

“The clear-cutting of giant swathes from the globe’s tropical forests has long been understood to be a major force behind global warming, but new research finds that smaller-scale forest loss—from minor logging and fires—is an even more powerful driver of climate change.

“On Thursday, scientists at the Woods Hole Research Center and Boston University published a study in the journal Science that says the planet’s tropical forests are releasing more carbon dioxide than they can store, mostly due to “fine scale” degradation and disturbance that previous studies haven’t captured.

“The finding means tropical forests may not act as carbon “sinks” unless both deforestation writ large and this more subtle degradation is stopped or slowed.

“The researchers looked at tropical forests across Asia, Africa and Latin America using a trio of tools—remote sensing, field observations and satellite imagery—that gave them a more comprehensive and detailed picture over a period of eleven years, from 2003 to 2014.

“This approach allowed them to measure not just large-scale deforestation, largely from agriculture, but smaller-scale degradation and disturbances that have, until now, been especially difficult to gauge.

“Collectively, these fine-scale losses have been very difficult to quantify,” said Wayne Walker, an associate scientist at Woods Hole and one of the report’s authors. “While they don’t seem like much in any given place, when you add them up across an areas as big as the tropics, they can be huge.” –Georgina Gustin (Death by 1,000 Cuts: Why the Forest Carbon Sink Is Disappearing | InsideClimate News).

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