X img

官方微信

img

群号:冰川冻土交流群

QQ群:218834310

高级检索
作者投稿 专家审稿 编辑办公 编委办公 主编办公

冰川冻土 ›› 2003, Vol. 25 ›› Issue (5): 541-546.

• 冻土与陆面过程 • 上一篇    下一篇

冻土过程参数化方案与中尺度大气模式的耦合

张宇1,2, 宋敏红1, 吕世华1, 孙菽芬2   

  1. 1. 中国科学院, 寒区旱区环境与工程研究所, 甘肃, 兰州, 730000;
    2. 中国科学院, 大气物理研究所, 北京, 100029
  • 收稿日期:2003-01-21 修回日期:2003-04-18 出版日期:2003-10-25 发布日期:2012-04-26
  • 作者简介:张宇(1975-), 男, 贵州六盘水人, 博士, 2002年在中国科学院寒区旱区环境与工程研究所获博士学位, 主要从事陆面过程模式发展和气候模拟研究.E-mail:yuzhang@mail.iap.ac.cn
  • 基金资助:
    中国科学院寒区旱区环境与工程研究所知识创新工程项目(CACX210036);国家重点基础研究发展规划项目(G1998040900);国家自然科学基金项目(40075019;40233034)资助

Frozen Soil Parameterization Scheme Coupled with Mesoscale Model

ZHANG Yu1,2, SONG Min-hong1, LÜ Shi-hua1, SUN Shu-fen2   

  1. 1. Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China;
    2. LASG, Institute of Atmospheric Physics, CAS, Beijing 100029, China
  • Received:2003-01-21 Revised:2003-04-18 Online:2003-10-25 Published:2012-04-26

摘要: 将发展的冻土过程参数化方案与耦合了NCARLSM陆面过程模式的中尺度大气模式MM5相耦合,对包括我国北方,蒙古国,东西伯利亚的高纬度地区进行了模拟.模拟时间选为北半球季节冻土生成的10月份.模拟结果表明,模式能够较好地模拟出该区域的冻土分布,并且对大气模式中海平面气压场、气温场的模拟改进显著.

关键词: 冻土过程, 陆面过程, 中尺度大气模式

Abstract: A simple frozen soil parameterization scheme is developed. It can be coupled with mososcale model system that coupled NCAR Land Surface Model(LSM), which considered the primary features of frozen soil as follows: 1)phase change in soil column is the source/sink term in energy budget, and soil ice content is set as a prognostic variables and can be solved by combination of freezing point depression equation and soil matrix potential relation; 2)a new parameterization of thermal conductance(J75)is adopted to replace the former one(Farouki, 1981), which can be more accurately described under frozen soil condition; 3)effect of soil ice on liquid water movement is considered and it also affects the partition of surface between infiltration and runoff. The simulation has been conducted over high latitude regions, including North China, Mongolia and East Siberia in October, when seasonal frozen soil is forming in the north hemisphere. The results indicate that the model can reasonably simulate frozen soil distribution. It is found that the simulated ice content and ground heat flux are related to the soil type and frozen depth. The simulation of sea level pressure field and air temperature field, therefore, can be evidently improved.

Key words: frozen soil parameterization, land surface model, mesoscale model

中图分类号: 

  • P435