Collaborative Research: NSF-SNSF: SCALE-UP - Understanding VPD impacts on forests across scales to advance the next generation of Earth-system models

The dryness of the Earth's atmosphere (vapor pressure deficit, or VPD) is increasing. Its effects on many plant processes – from leaf photosynthesis, to tree growth and mortality, to forest production and water use – remain poorly understood. How does rising VPD affect different tree species growing in different locations? How do the effects of…