Data collected by the International Space Station has revealed a small fraction of leaves in the world's tropical rainforests are already exceeding peak temperatures, and scientists warn that this could increase.
Climate change could be gradually making the world's tropical rainforests too hot for photosynthesis to occur, and it may eventually trigger their collapse, a new study has warned.
"It's concerning from our perspective that you see nonlinear trends. So you heat the air by, let's say, 2, 3 degrees Celsius [3.6 to 5.4 F], and the actual upper temperature of these leaves goes up by 8 degrees [Celsius; 14.4 F]," Christopher Doughty, an associate professor of ecoinformatics at Northern Arizona University, said during a press conference on Monday .
The scientists combined ECOSTRESS temperature readings from 2018 to 2020 with thousands of ground measurements made from infrared-sensing pyrgeometers in rainforests across South America, Central Africa and Southeast Asia. By performing laboratory leaf experiments at 3.6, 5.4 and 7.2 F of warming, the researchers found that temperatures around some of the leaves peaked much higher than the air temperature — by up to 14.4 F .
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