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State of the science and future direction of air-surface exchange models for reactive compounds
Citation:
Wu, Z., JohnT Walker, R. Saylor, L. Zhang, J. Bash, B. Place, AND E. Delaria. State of the science and future direction of air-surface exchange models for reactive compounds. National Atmospheric Deposition Program Fall 2021 Science Symposium, Virtual, Virtual, October 25 - 29, 2021.
Impact/Purpose:
This presentation briefly summarizes the state of the science of several categories of air-surface exchange models (e.g, big-leaf and multilayer resistance, inverse source-sink, canopy-scale chemical transport). We then explore the future direction of air-surface exchange modeling for reactive compounds and the types of measurements that will be needed to facilitate model advances.
Description:
Air-surface exchange models simulate the exchange of gases and aerosols between the atmosphere and biosphere. They are used to develop site-specific dry deposition budgets, examine flux processes, and some forms are used in 3-D chemical transport models. Air-surface exchange models span a range of complexity from simple resistance-based “big-leaf” parameterizations to multilayer models that simulate in- and above-canopy exchange processes, chemistry and turbulence. As new measurements continue to illustrate the complexity of air-surface exchange of reactive compounds (i.e., bidirectional exchange, upward particle fluxes), models must evolve to more accurately simulate leaf- to canopy-scale processes. Additionally, the need to link deposition, air quality, weather and climate in predictions of long-term ecosystem change places greater demand on models to incorporate complex interactions (i.e., biogeochemistry, in-canopy air chemistry, ecophysiology) while maintaining computational efficiency. This presentation briefly summarizes the state of the science of several categories of air-surface exchange models (e.g, big-leaf and multilayer resistance, inverse source-sink, canopy-scale chemical transport). We then explore the future direction of air-surface exchange modeling for reactive compounds and the types of measurements that will be needed to facilitate model advances.
