Water Resources Research Act Program

Details for Project ID 2018IL339B

Redefine Droughts in the U.S. Corn Belt: Stomatal conductance constraints attributable to atmospheric demand and/or soil water supply

Institute: Illinois
Year Established: 2018 Start Date: 2018-03-01 End Date: 2019-02-28
Total Federal Funds: $10,000 Total Non-Federal Funds: $20,000

Principal Investigators: Kaiyu Guan, Hyungsuk Kim

Project Summary: Stomatal conductance (Gs) that controls CO2 diffusive fluxes (i.e. photosynthesis) between atmosphere and plants is one of the key factors to quantify drought impact. We aim to test the hypothesis that “variance of Gs in croplands would be dominantly explained by the atmospheric dryness indicated by VPD rather than by soil moisture deficit”.