 Effect of a coupled soil water–plant gas exchange on forest energy fluxes: Simulations with the coupled vegetation–boundary layer model HIRVACBjörn Fischer, Valeri Goldberg and Christian Bernhofer Ecological Modelling, 2008, vol. 214, issue 2, 75-82 Abstract: Long-living plant communities such as forests reduce their transpiration by closing and opening the leaf stomata as a common strategy to save water in dry periods. Meteorological models including vegetation should consider this mechanism to simulate realistic water transport from the plant to the atmosphere. Results of the German network project VERTIKO showed that commonly used meso-models such as Lokalmodell (German Weather Service) often overestimate evapotranspiration of vegetated surfaces during dry periods. This is, among other things, due to the insufficient plant-specific coupling between the soil water content and the physiological reactions of leaf stomata in the implemented SVAT modules. This study presents an approach to describe the above-mentioned coupling mechanism by upgrading the coupled vegetation boundary layer model HIRVAC. A stomatal reaction on soil moisture change, which is a part of HIRVAC, is parameterised in the included mechanistic photosynthesis model for C3 plants (PSN6). Keywords: Atmospheric boundary layer model; Forest energy fluxes; Soil moisture; Water stress; Stomatal reaction (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:214:y:2008:i:2:p:75-82 DOI: 10.1016/j.ecolmodel.2008.02.037 Access Statistics for this article Ecological Modelling is currently edited by Brian D. Fath More articles in Ecological Modelling from Elsevier |
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