摘要
A compartment model of dynamic deposition processes has been developed and testedin the Potou loess section of China. There are four components in the model : carbonate input ofeolian dust, carbonate output of erosion, carbonate chemical equilibrium and soil water balance. Aclimate stochastic model software (CLIMAK) generates the daily weather data. The processes ofeolian dust deposition, erosion, and pedogenesis simulate the complex process of carbonatedeposition 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 fluxesfrom precipitation, eolian dust and erosion are 0.14g/cm^2/kg, 1.45g/cm^2/ka and 0.23g/cm^2/karespectively. Of this, 91.2% of the carbonate input is from eolian dust.
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.
作者
LI Xuyong
LI Baoguo
LU Huayi
DUAN Jiannan
SHI Yuanchun Commission for Integrated Survey of Natural Resources, CAS, Beijing 100101, China
Department of Soil and Water, China Agricultural University, Beijing 100094. China
Xian Laboratory for Loess and Quaternary Research, CAS, Xian 710054, China, Institude of the Loess Plateau. Shanxi University, Taiyuan 030000, China
