【摘要】 利用改进了的加进NCAR陆面过程(LSM)的NCARMM5大气模式中的土壤冻融过程参数化方案和2001年10月2～30日的NCEP再分析资料,对青藏铁路沿线区域进行数值模拟试验。在新方案中改进了土壤径流和土壤渗透影响土壤层的水文过程,增加了对土壤含冰量的求解,较真实地反映了土壤的冻融过程。模拟结果表明,改进土壤冻融过程方案后,模式对地温、地面通量的模拟有一定的改进,能够反映土壤冻结初期陆面要素场的变化。更多还原

【Abstract】 Using the improvedparameterization schemes of freezing and melting soil processes in NCAR MM5 atmosphere model coupling NCAR LSM land surface model and the NCEP reanalysis data from October 2 to 30, 2001, the numerical simulation experiment in Qinghai\|Xizang railway\|line region was carried out. The influence of soil folw\|off and infitration on the hydrological process of soil was improved in the new scheme, the resolution of ice content was added, so that the model can really reflect the soil freezing and melting processes. The results show that after improved freezing and melting soil schemes, the model has shown some improvements in the simulation of soil temperature and surface flux, and it can reflected the change of land surface element during the early period of soil freezing.更多还原