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地下水面是土壤生态系统内部的一个重要界面，使土壤ＣＯ２系统形成固有的垂直分 带性及分带结构。地下水面的季节性升降能够引起土壤ＣＯ２系统的强烈响应。首先使土壤空 气发生机械性整体对流。同时，还通过引发一系列其它物理、化学和生物变化，激发产生一个 局部扩散层，从而改变ＣＯ２剖面垂直分带结构。粘性土壤、土质不均和土壤液相部分有较大碳 酸盐容量是产生局部扩散层的主要内在原因。在中国南方岩溶平原区高台型地下水动态条件 下，地下水面季节性升降的活塞效应和气温年周期变化叠加，使土壤ＣＯ２剖面形态变化形成有 规律的序列演化旋回。这一规律可以帮助对土壤ＣＯ２进行中长期预测。
Groundwater surface is an important interface inside soil ecosystem, which makes soil CO2 system form vertical vertical zonality and zonation structure. The seasonal rise and fall of the groundwater surface can cause a strong response of the soil CO2 system. First, make the soil air mechanical convection. It also changes the vertical zonation of the CO2 profile by triggering a series of other physical, chemical, and biological changes that stimulate the creation of a local diffusion layer. Cohesive soils, uneven soil quality and larger carbonate content in the liquid phase of the soil are the main intrinsic causes of local diffusion. Under the condition of the high table type groundwater in the karst plain area of southern China, the piston effect of seasonal rise and fall of groundwater surface and the annual variation of temperature cycle are superposed, and the shape of soil CO2 profile changes to form a regular sequence evolution cycle. This law can help predict soil CO2 in the long run.