Scientists may now be able to predict forest die-off up to 19 months in advance
In July of 2015, California’s forests began to crumple. Parched from more than three years of severe drought, trees died in droves, transforming entire swaths of the Sierra Nevada from vibrant green to dull, lifeless red. … But as Mukesh Kumar and his colleagues would discover, California’s trees had sounded a subtle death knell long before they breathed their last.