"You #heat  the air by two to three degrees and the actual upper temperature of these leaves goes up by eight degrees," lead author Christopher Doughty of Northern Arizona University told journalists.

If tropical forest's average surface temperature warms 4C above current levels—widely considered a worst-case scenario—"we're predicting possible total leaf death." https://phys.org/news/2023-08-tropical-forests-nearing-critical-temperatures.html
#climatechange