Earth’s “Green Wave” Is on the Move

New research shows that the “green wave” of vegetation that moves across Earth each year is moving northeast in response to climate change. The kernel normalized difference vegetation index (kNDVI) is a measure of the greenness of vegetation. Credit: Interactive design by Ida Flik, implementation by Ida Flik and Maximilian Söchting, using data from Mahecha et al., 2026, https://doi.org/10.1073/pnas.2515835123