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首页> 外文期刊>Forest Ecology and Management >Ecosystem-scale biosphere-atmosphere interactions of a hemiboreal mixed forest stand at Jarvselja, Estonia. (Special Section: Environmental stress and forest ecosystems: case studies from Estonia.)
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Ecosystem-scale biosphere-atmosphere interactions of a hemiboreal mixed forest stand at Jarvselja, Estonia. (Special Section: Environmental stress and forest ecosystems: case studies from Estonia.)

机译：爱沙尼亚Jarvselja的半实体混交林林分的生态系统规模的生物圈-大气相互作用。 （特别部分：环境压力和森林生态系统：爱沙尼亚的案例研究。）

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摘要

During two measurement campaigns, from August to September 2008 and 2009, we quantified the major ecosystem fluxes in a hemiboreal forest ecosystem in Jarvselja, Estonia. The main aim of this study was to separate the ecosystem flux components and gain insight into the performance of a multi-species multi-layered tree stand. Carbon dioxide and water vapor fluxes were measured using the eddy covariance method above and below the canopy in conjunction with the microclimate. Leaf and soil contributions were quantified separately by cuvette and chamber measurements, including fluxes of carbon dioxide, water vapor, nitrogen oxides, nitrous oxide, methane, ozone, sulfur dioxide, and biogenic volatile organic compounds (isoprene and monoterpenes). The latter have been as well characterized for monoterpenes in detail. Based on measured atmospheric trace gas concentrations, the flux tower site can be characterized as remote and rural with low anthropogenic disturbances. Our results presented here encourage future experimental efforts to be directed towards year round integrated biosphere-atmosphere measurements and development of process-oriented models of forest-atmosphere exchange taking the special case of a multi-layered and multi-species tree stand into account. As climate change likely leads to spatial extension of hemiboreal forest ecosystems a deep understanding of the processes and interactions therein is needed to foster management and mitigation strategies.
机译：在2008年8月至2008年9月的两次测量活动中，我们对爱沙尼亚Jarvselja的半实体森林生态系统中的主要生态系统通量进行了量化。这项研究的主要目的是分离生态系统通量成分，并深入了解多物种多层树架的性能。结合小气候，利用冠层上方和下方的涡度协方差法测量二氧化碳和水蒸气通量。叶子和土壤的贡献分别通过比色杯和小室测量进行量化，包括二氧化碳，水蒸气，氮氧化物，一氧化二氮，甲烷，臭氧，二氧化硫和生物挥发性有机化合物（异戊二烯和单萜）的通量。后者也已经详细描述了单萜。根据测得的大气中痕量气体浓度，可以将通量塔站点的特征定为偏远的乡村和低人为干扰。我们在这里提出的结果鼓励未来的实验工作朝着全年进行生物圈-大气综合测量和考虑到多层和多种树种特殊情况的森林-大气交换的过程导向模型的发展。由于气候变化可能导致半实体森林生态系统的空间扩展，因此需要深入了解其中的过程和相互作用，以促进管理和缓解战略。

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