初冬青藏高原冻土过程的数值模拟  

Numerical Simulation of Freezing Soil Process on Qinghai-Xizang Plateau in Early Winter

作　　者：张艳武[1] 吕世华[1] 李栋梁[1] 黄静[2] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000 [2]兰州大学资源环境学院大气科学系,甘肃兰州730000

出　　处：《高原气象》2003年第5期471-477,共7页Plateau Meteorology

基　　金：中国科学院知识创新工程重大项目"青藏铁路工程与多年冻土相互作用及其环境效应"(KZCX1 SW 04);中国科学院方向性项目"内陆河水-土-气-生观测与综合研究"(KZCX3 SW 329);"百人计划"(200340)资助

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。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.

关 键 词：青藏高原 土壤冻融 NCAR MM5 NCAR LSM 

分 类 号：P461.3[天文地球—大气科学及气象学]