1. General Model Information

Name: A model of Soil Organic Matter dynaMics. Version II.

Acronym: SOMM

Main medium: terrestrial
Main subject: biogeochemistry
Organization level:
Type of model: ordinary differential equations
Main application:
Keywords: mineralization, humification, nutrient release, soil, organic matter


Prof. Oleg Chertov.

St. Petersburg Forest Academy,
Faculty of Forestry, Institutsky 5,
194018 St.Petersburg,

Phone: +7.812.550078
Fax: +7.812.5500815
email: oleg.chertov@efi.fi



SOMM is a simulation model of soil organic matter mineralization, humification and nutrient release.
The model takes into account the rate of the processes depending on litter fall's nitrogen and ash content, temperature and moisture. The functioning of the main groups of soil destructors is reflected in the model.
The model represents a system of linear differential equations with variable coefficients.
The model has been verified on a basis of independent data of short-term laboratory and field experiments. The results of the simulation show the applicability of SOMM for a wide range of environmental conditions from tundra to tropical rain forest. The model can be used for modelling soil system and natural ecosystems' dynamics mostly.

SOMM is used as the soil sub model with the EFIMOD individual-based tree/soil model of North European forest ecosystems.

II. Technical Information

II.1 Executables:

Operating System(s):

II.2 Source-code:

Programming Language(s):

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

Chertov O.G.; Komarov A.S. 1997.SOMM: A model of soil organic matter dynamics. Ecological Modelling 94: 2-3, 177-190; 62 ref..

Chertov O.G., Komarov A.S., G. Crocker, P. Grace, J. Klir, M. Körschens, P.R. Poulton, D. Richter. 1997. Simulating trends of soil organic carbon in seven long-term experiments using the SOMM model of the humus types. Special Issue: evaluation and comparison of soil organic matter models. Geoderma. 1997, 81: 1-2, 121-135; 24 ref..

Smith P.(ed.), Smith J.U.(ed.), Powlson D.S. (ed.), Arah J.R.M., Chertov O.G., Komarov, A.S. et al. 1997. A comparison of the performance of nine soil organic matter models using datasets from seven long-term experiments. Special Issue: evaluation and comparison of soil organic matter models.Geoderma. 1997, 81: 1-2, 153-225; 78 ref..

Chertov O.G., Komarov A.S. 1996. Model of soil organic matter and nitrogen dynamics in natural ecosystems. In: D.S.Powlson, P.Smith & J.U.Smith, Eds. Evaluation of Soil Organic Matter Models Using Existing Long-Term Datasets. NATO ASI Vol. I 38, Springer-Verlag, Heidelberg: 231-236. In English.

Chertov O.G., Komarov A.S. 1996.Model of soil organic matter dynamics. Gerald of St.-Petersburg University. Ser. biol.(3), No 1. In Russian with English summary.

Chertov O.G., Komarov A.S. 1995. On Mathematical Theory of Soil Forming Processes. Pushchino Res. Center of Russian Acad. Sci., Pushchino. Preprint. 43 p. In English.

Chertov O.G. (submitted) Estimation of soil organic matter pool in forests of St.-Petersburg region, Russia. In: Harmon M., Krankina O., Eds. Comperison of Carbon Pools and Sequestration in forests of US Pacific and Russian Northwest. Oxford Acad. Press. 17 p.

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: Juergen Bierwirth Wed Feb 03 16:38:13 CET 1999
Status of the document:
last modified by Joachim Benz Mon Jul 2 18:31:37 CEST 2007

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