Simulation of NO and N₂O emissions from a spruce forest during a freeze/thaw event using an N-flux submodel from the PnET-N-DNDC model integrated to CoupModel

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• 作者：Josefine Norman ; Per-Erik Jansson ; Neda Farahbakhshazad ; Klaus Butterbach-Bahl ; Changsheng Li ; Leif Klemedtsson
• 关键词：Forest ecosystem modelling ; NO emission ; N₂O emission ; CoupModel ; DNDC model
• 刊名：Ecological Modelling
• 出版年：2008
• 出版时间：10 August 2008
• 年：2008
• 卷：216
• 期：1
• 页码：18-30
• 全文大小：911 K

文摘

The amount of nitrogen gases (N₂O, NO and N₂) emitted from forest soils depends on interactions between soil properties, climatic factors and soil management. To increase the understanding of nitrogen processes in soil ecosystems, two dynamic models, CoupModel (coupled heat and mass transfer model for soil–plant–atmosphere systems) and the denitrification–decomposition (DNDC) model were selected. Both are dynamic models with different submodels for soil, vegetation, hydrology and climate system. CoupModel has a higher degree of detail on soil physical and abiotic components, whereas the DNDC model contains details of microbiological processes involved in production of nitrogen gases. To improve the previous simple submodel of nitrogen emission in CoupModel, we included a submodel corresponding to the forest version of DNDC containing photosynthesis/evapotranspiration-nitrogen (PnET-N-DNDC model).