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It is well known that tree-ring formation mechanism is influenced by the number of climate and non-climate factors. An analysis of simulated and observed cell production of tree rings allows to separate the climate signal from other local effects (e.g., fire or insects), which can be fixed in the tree ring profile. One of principal indicators in tree ring structure is a distribution of radial cell sizes during growing season. In this work the process-based tree-ring VS-model was used to resolve the critical processes linking climate variables to tree-ring formation. A new block of the model allows to estimate a cell production in tree rings and transfer it into time scale based on simulated integral growth rates of the model. The obtained detailed approach with a calculation of time moment of each cell formation improves significantly the date accuracy of new cell formation in growing season. In the developed algorithm we used integral growth rates simulated by the VS-model for each growing season. The approach was applied and tested for the cell measurements obtained for Scots pine (Pinus sylvestris L.) over the 1964-2009 in the middle stream flow of Malaya Minusa river (Khakassia, Southern Siberia). [ABSTRACT FROM AUTHOR]