Simulation of carbon and water budgets of a Douglas fir forest
Simulation of carbon and water budgets of a Douglas fir forest
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花旗松森林的碳和水收支模拟
DOI：
10.1016/s0378-1127(00)00439-4
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发表时间：
2001
影响因子：
3.7
通讯作者：
G. Mohren
中科院分区：
文献类型：
--
作者：
M. V. Wijk;S. Dekker;W. Bouten;W. Kohsiek;G. Mohren
森林生长/水文模型FORGRO-SWIF由森林生长模型和土壤水分模型组成，应用于花旗松（Pseudotsuga menziessii（Mirb.）在荷兰的佛朗哥。利用这些预算，估算了水的利用效率、固定一定量碳所需的水量及其变异性。在测试了模型在模拟该森林生态系统的日碳通量和蒸腾通量以及土壤水分含量方面的性能后，将该模型应用于10年的气象数据。使用了两种森林参数化：1995年的非间伐情况和1996年的间伐情况。利用该模型定量分析了森林水分利用与森林生长的关系。该模型表现令人满意，每日碳通量的R2值为0.58，每日蒸腾通量为0.81。森林是一个明显的碳汇，在1000和1210 g C m− 2/年之间的顶极情况。在变薄的情况下，碳吸收量减少了一半以上，达到每年430至620 g C m− 2之间。森林的年WUE在2.5和4.3 g C m− 2 mm − 1之间，整个生态系统在1.1和2.0 g C m− 2 mm −1之间。间伐林的WUE明显低于未间伐林。讨论了将截留蒸发作为森林水分利用的重要性，结果表明，将森林生长和森林水分利用结合起来计算年碳和水收支的重要性。
The forest growth/hydrology model FORGRO–SWIF, consisting of a forest growth and a soil water model, was applied to quantify the inter-annual variability of the carbon and water budgets of a Douglas-fir forest (Pseudotsuga menziessii (Mirb.) Franco) in The Netherlands. With these budgets, the water use efficiency, the amount of water needed to fix a certain amount of carbon, and its variability was estimated. After testing the model performance in simulating daily carbon and transpiration fluxes, and soil water contents of this forest ecosystem, the model was applied to a 10-year period of meteorological data. Two forest parameterisations were used: the non-thinned situation of 1995, and the thinned situation in 1996. Relations between forest water use and forest growth were quantified with the model. The model performed satisfactory, an R2value for daily carbon fluxes of 0.58 and for daily transpiration fluxes 0.81. The forest showed to be a clear carbon sink, in the climax situation between 1000 and 1210g C m−2per year. In the thinned situation the carbon uptake was more than halved to values between 430 and 620g C m−2per year. The calculated yearly WUE’s for the forest were between 2.5 and 4.3g C m−2mm−1and for the total ecosystem between 1.1 and 2.0g C m−2mm−1. The thinned forest had clearly lower WUE’s than the non-thinned forest. The importance of including interception evaporation as forest water use is discussed, and the results showed the importance of integration of forest growth and forest water use for calculating yearly carbon and water budgets.