Modeling and simulation of dynamic carbonate deposition in a loess-paleosol sequence
Modeling and simulation of dynamic carbonate deposition in a loess-paleosol sequence
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发表时间：
1999
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通讯作者：
Li Xuyon
中科院分区：
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作者：
Li Xuyon
本文提出了一个动态沉积过程的分室模型，并在坡头黄土剖面上进行了试验。该模型由四个部分组成：风尘碳酸盐输入、侵蚀碳酸盐输出、碳酸盐化学平衡和土壤水分平衡。气候随机模式软件（CLIMAK）生成每日天气数据。风尘沉积、侵蚀和成土作用模拟了黄土-古土壤序列中碳酸盐沉积的复杂过程。我们考虑气候变化和土壤形成因素。结果表明，坡头剖面晚更新世以来，来自降水、风尘和侵蚀的碳酸盐通量平均值分别为0.14g/cm~2/kg、1.45g/cm~2/ka和0.23g/cm~2/ka。其中，91.2%的碳酸盐输入来自风成尘。
A compartment model of dynamic deposition processes has been developed and tested in the Potou loess section of China. There are four components in the model : carbonate input of eolian dust, carbonate output of erosion, carbonate chemical equilibrium and soil water balance. A climate stochastic model software (CLIMAK) generates the daily weather data. The processes of eolian dust deposition, erosion, and pedogenesis simulate the complex process of carbonate deposition in a loess-paleosol sequence. We consider both climatic change and soil-forming factors. The results indicate that since the Late Pleistocene in Potou section, the mean carbonate fluxes from precipitation, eolian dust and erosion are 0.14g/cm~2/kg, 1.45g/cm~2/ka and 0.23g/cm~2/ka respectively. Of this, 91.2% of the carbonate input is from eolian dust.