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From biota to chemistry and climate: towards a comprehensive description of trace gas exchange between the biosphere and atmosphere

Abstract : Exchange of non-CO 2 trace gases between the land surface and the atmosphere plays an important role in atmospheric chemistry and climate. Recent studies have highlighted its importance for interpretation of glacial-interglacial ice-core records, the simulation of the pre-industrial and present atmosphere, and the potential for large climate-chemistry and climate-aerosol feedbacks in the coming century. However, spatial and temporal variations in trace gas emissions and the magnitude of future feedbacks are a major source of uncertainty in atmospheric chemistry, air quality and climate science. To reduce such uncertainties Dynamic Global Vegetation Models (DGVMs) are currently being expanded to mechanistically represent processes relevant to non-CO 2 trace gas exchange between land biota and the atmosphere. In this paper we present a review of im-Correspondence to: A. Arneth (almut.arneth@nateko.lu.se) portant non-CO 2 trace gas emissions, the state-of-the-art in DGVM modelling of processes regulating these emissions, identify key uncertainties for global scale model applications , and discuss a methodology for model integration and evaluation.
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Almut Arneth, Stephen Sitch, Alberte Bondeau, K. Butterbach-Bahl, P. Foster, et al.. From biota to chemistry and climate: towards a comprehensive description of trace gas exchange between the biosphere and atmosphere. Biogeosciences, European Geosciences Union, 2010, 7 (1), pp.121 - 149. ⟨10.5194/bg-7-121-2010⟩. ⟨hal-01788205⟩

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