Influence of meteorology and anthropogenic pollution on chemical flux divergence of the NO–NO2–O3 triad above and within a natural grassland canopy

Auteurs

D. Plake, M. Sörgel, P. Stella, A. Held, and I. Trebs

Référence

Biogeosciences, vol. 12, no. 4, pp. 945-959, 2015

Description

The detailed understanding of surface–atmosphere exchange fluxes of reactive trace gases is a crucial precondition for reliable modelling of processes in atmospheric chemistry. Plant canopies significantly impact the atmospheric budget of trace gases. In the past, many studies focused on taller forest canopies or crops, where the bulk plant material is concentrated in the uppermost canopy layer. However, within grasslands, a land-cover class that globally covers vast terrestrial areas, the canopy structure is fundamentally different, as the main biomass is concentrated in the lowest part of the canopy. This has obvious implications for aerodynamic in-canopy transport, and consequently also impacts on global budgets of key species in atmospheric chemistry such as nitric oxide (NO), nitrogen dioxide (NO2) and ozone (O3).

Lien

doi:10.5194/bg-12-945-2015, 2015

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