"Trees store a huge amount of carbon and play a critical role in regulating global carbon balance," Chuixiang "Tree" Yi of City University of New York, US, and Stockholm University, Sweden, told environmentalresearchweb. "Recently, ecologists have found that trees in the American west are dying at a quickening and alarming rate, which is most likely caused by warming-associated drought. Our main concern is how dry is dry enough to approach the tipping point of widespread increase of tree mortality rates."

- Citation from Environmental Research Web

You can read the entire research paper in Environmental Research Letter and find more information about Chuixiang "Tree" Yi on his personal website