Ozone dry deposition through plant stomata: Multi-model comparison with flux observations and the role of water stress as part of AQMEII4 Activity 2.

ABSTRACT: A substantial portion of tropospheric O3 dry deposition occurs after diffusion of O3 through plant stomata. Simulating stomatal uptake of O3 in 3D atmospheric chemistry models is important in the face of increasing drought induced declines in stomatal conductance and enhanced ambient O3 . Here, we present a comparison of the stomatal component of O3 dry deposition egs from chemical transport models and estimates of egs from observed CO2 , latent heat, and O3 flux. The dry deposition schemes were configured as single-point models forced with data collected at flux towers. We conducted sensitivity analyses to study the impact of model parameters that control stomatal moisture stress on modeled egs . Examining six sites around the northern hemisphere, we find that the seasonality of observed

SUBMITTER: Khan AM 

PROVIDER: S-EPMC12425119 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature