Atmosphere-biosphere trace gas exchanges simulated with a single-column model

摘要: [1] The exchange of oxidized nitrogen species (NOx) between the biosphere and atmosphere is controlled by complex interactions emissions, dry deposition, (photochemical) chemical transformations, turbulent exchanges, all varying with height within canopy. We have developed a multilayer atmosphere-biosphere trace gas model to study role canopy in net NOx flux on global scale. evaluate this model, implemented single-column chemistry meteorological for selection ecosystems comparison observations. The modeled observed ozone concentrations fluxes are generally reasonable agreement if we constrain our site-specific surface parameters. sensitivity nocturnal appears be large. A calculated traditional big leaf approach presented. For sites that exposed relatively large anthropogenic emission fluxes, big-leaf calculate similar which confirms applicability polluted regions. However, pristine sites, differences significant. This underscores importance an explicit representation processes those locations where NO soil emissions comparable or exceeds emissions.