New decomposition rate functions based on volumetric soil water content for the ROMUL soil organic matter dynamics model

Tapio Linkosalo, Pasi Kolari and Jukka Pumpanen

Ecological Modelling, 2013, vol. 263, issue C, 109-118

Abstract: The ROMUL decomposition model describes the flux of soil organic matter through the soil decomposition process separately for the organic layer (forest floor) and mineral soil. In the original ROMUL the effect of soil moisture on soil organic matter decomposition was described by using gravimetric soil water content, a parameter that is often difficult to obtain when the model is applied using continuous weather data. The new decomposition rate functions based on a soil respiration model use volumetric soil water content, replacing the original moisture functions with new ones. This paper also describes the development of a simple volumetric soil water model, with separate water storage compartments for the organic and mineral soil layers to better correspond with the structure of the ROMUL model. A volumetric soil model is also easier to adapt to various locations than the gravimetric soil water model.

Keywords: Soil water model; Soil decomposition model; ROMUL; Boreal forest; Soil organic carbon (search for similar items in EconPapers)
Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:263:y:2013:i:c:p:109-118

DOI: 10.1016/j.ecolmodel.2013.04.026

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