黄河源区陆面过程的数值模拟研究

利用青海黄河源玛多地区2011年7月5～7日土壤温度的观测资料，根据热传导一对流方法计算出该地区的土壤热扩散率和水通量密度的值，代入青藏高原陆面模式TP-LSM（Tibetan Plateau Land Surface Model），模拟了青海黄河源玛多地区夏季总辐射、净辐射、土壤热通量的日变化情况，并与实测资料进行了比较和分析。结果表明，黄河源玛多地区夏季的土壤热扩散率的值为8．35×10^-7m^2／s，水通量密度的值为-1．92×10^-7m／s；TP-LSM模式能够有效地模拟出高原上夏季总辐射、净辐射、土壤热通量的日变化情况，对青藏高原玛多地区夏季总辐射、净辐射和土壤热通量模拟的标准差分别为119、127、109W／m^2。

Numerical Simulation Research of Land Surface Processes at Origin Area of Yellow River

Using observed daia of soil temperature at Maduo, origin area of Yellow-River in Qinghai from Jul. 5 to Jul. 7, 2011, the value of soil thermal diffusivity and soil water flux density were calculated with thermal conduction-convection algorithm and used in Tibetan Plateau Land Surface Model（TP-LSM） to simulate daily change of total radiation, net radiation and soil heat flux. The simulated results were analyzed and compared with observed data. The conclusions show that in summer the soil thermal diffusivity is 8.35 × 10 ^-7m^2/s and soil water flux den- sity is - 1.92 × 10 ^-7 m/s at Maduo. TP-LSM could effectively simulate daily changes of total radiation, net radiation and soil heat flux on Ti- betan Plateau in summer. The simulated standard deviations of total radiation, net radiation and soil heat flux were 119, 127, 109 W/m^2.