文章基本信息

标题：A semi-empirical model of boreal-forest gross primary production, evapotranspiration, and soil water — calibration and sensitivity analysis
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作者：Mikko Peltoniemi ; Minna Pulkkinen ; Mika Aurela 等
期刊名称：Boreal Environment Research
印刷版ISSN：1239-6095
出版年度：2015
卷号：20
期号：2
页码：151-171
语种：English
出版社：Finnish Limnological Society
摘要：Simple approaches to predicting ecosystem fluxes are useful in large-scale applications because existing data rarely support justified use of complex models. We developed a model of daily ecosystem gross primary production (P), evapotranspiration (E), and soil water content (θ), which only requires standard weather data and information about the fraction of absorbed radiation. We estimated the parameters of the model for two boreal Scots pine eddy-covariance sites (Hyytiälä and Sodankylä). The model predicted P and E adequately for Hyytiälä for both calibration and additional test years. The model calibrated for Hyytiälä slightly overestimated P and E in Sodankylä, but its performance levelled with the model calibrated for Sodankylä in a dry year. Sensitivity analysis of the model implied that drought prediction is sensitive, not only to key E submodel parameters, but also to P submodel parameters. Further improvement and calibrations of the model could benefit from forest sites with varying canopy and different species structures.