Global team of scientists determine 'fingerprint' for how much heat, drought is too much for forests NatureComms
"In this study, we're letting the Earth's forests do the talking," said William Hammond, a University of Florida plant ecophysiologist who led the study."We collected data from previous studies documenting where and when trees died, and then analyzed what the climate was during mortality events, compared to long-term conditions."on the observed forest mortality data, Hammond noted, a pattern emerged.
"Our hotter-drought fingerprint revealed that global forest mortality is linked to intensified climate extremes," Hammond said."Using climate model data, we estimated how frequent these previously lethal climate conditions would become under further warming, compared to pre-industrial era climate—22% more frequent at plus 2 degrees Celsius , to 140% more frequently at plus 4 degrees Celsius .
Hammond says that relying, in part, upon trees and other plants to capture and sequester carbon, as some proposed climate solutions suggest, makes it is critical to understand how hot is 'too hot,' and how dry is 'too dry.'"Otherwise mortality events, like those included in our database, may wipe out planned carbon gains."
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