Spatial heterogeneity of soil organic carbon in a small alpine catchment (Grindelwald, Switzerland)
Spatial heterogeneity of soil organic carbon in a small alpine catchment (Grindelwald, Switzerland)
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发表时间：
2009
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通讯作者：
U. Poppe
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作者：
U. Poppe
土壤是全球碳循环中的一个主要库。它们在全球气候和环境问题中作为碳储存库的行为远未得到充分理解。表层土壤有机碳库和周转时间对一系列因素特别敏感，如气候、植被、地形、土壤性质、土壤和作物管理以及其他人为条件。这些因素对于建立基于过程的碳循环模型和评估未来土地利用和气候变化对土壤有机碳含量的影响具有重要意义。山区环境受气候变化（地貌、植被）的强烈影响，对气候变化高度敏感，同时也经历着重大的土地使用变化。到目前为止，很少有人注意到高山SOC股票的空间异质性。在山区环境中，地形对控制SOC的因素有很强的控制作用，例如通过中气候差异，但地表过程，如物质浪费和水侵蚀。虽然环境变量和SOC之间的一般关系是已知的，但SOC和环境变量之间的具体定量关系还不确定。特别是，地貌过程，土壤厚度和土壤碳储量之间的相互作用还没有得到很好的理解。
Soils represent a major pool in the global carbon cycle. Their behaviour as a carbon reservoir in global climate and environmental issues is far from fully understood. Surface soil organic carbon (SOC) pools and turnover times are particularly sensitive to a range of factors, such as climate, vegetation, topography, soil properties, soil and crop management and other anthropogenic conditions. These factors are important to formulate process-based C cycling models and to evaluate the influence of future land use and climate changes on SOC content. Mountain environments are strongly affected by and highly sensitive to climate change (geomorphology, vegetation), while also experiencing significant land use change. Little attention has so far been given to the spatial heterogeneity of alpine SOC stocks. In mountain environments, relief exerts a strong control on factors which control SOC, e.g. through meso-climatic differences, but surface processes such as mass wasting and water erosion. While the general relationships between environmental variables and SOC are known, there is uncertainty regarding the specific quantitative relationships between SOC and environmental variables. Particularly, the interaction between geomorphic processes, soil thickness and soil carbon storage is not well understood.