收稿日期: 2001-04-04
修回日期: 2001-06-15
网络出版日期: 2002-02-01
基金资助
国家自然科学基金项目“青藏高原季节冻融过程与中国夏季降水关系的研究”（编号：40175020）；中国科学院知识创新工程项目“西部生态环境演变规律与水土资源可持续利用研究”(编号：KZCX1-10-07)；中国科学院寒区旱区环境与工程研究所创新课题“典型流域气候与环境协调模式发展研究”；中国科学院知识创新工程重要项目“亚洲季风区海—陆—气相互作用对我国气候变化的影响”（编号：ZKCX２-210）资助.
THE DEVELOPMENT OF STUDY ON THE SOIL FREEZING THAW PROCESS IN LAND SURFACE MODEL
Received date: 2001-04-04
Revised date: 2001-06-15
Online published: 2002-02-01
韦志刚 , 王澄海 , 董文杰 . 陆面模式中土壤冻融过程参数化研究进展[J]. 地球科学进展, 2002 , 17(1) : 44 -52 . DOI: 10.11867/j.issn.1001-8166.2002.01.0044
The role of soil moisture is important in climate and climate change. In climate simulations, anomalies in soil moisture affect the precipitation, temperature and motion fields of the atmosphere at the regional and global scale. It has important role in the design of land surface model and general circulation model. The parameterization of soil freezing-thaw in land surface model is difficult issue in many modeling groups currently investigating how well it can be simulated. Most studies have focused on the role of liquid soil moisture in climate modeling with the role of seasonally frozen soil moisture receiving little attention. Compared and concluded freezing-thaw processes within some major Land surface processor schemes (SSIB, BATS, VIC, BASE and LSM) in this paper. First, the theory background and development history in soil moisture parameterization is reviewed. The hydrological importance of freezing processes for the 35% of the Earth’s surface which is subject to freezing and thawing is well documented. However, modeling the complexity of the frozen soil system is challenging and has received some attention. It is understandable that far simpler models have evolved which aim to represent the key feature of freezing and thawing. Then, how frozen soil moisture is a parameterized in climate model (Bucket, SSIB, BATS, VIC, BASE and LSM) is described. And it is suggest that most problems could be linked to the parameterization of hydraulic conductivity, it is related to the layer of soil column also. And to improve the simulations further, it may be necessary to model the effects of cryoturbation (including macropores), freezing fronts, icelensing and other periglacial processes. Finally, we conclude and discussed the development will been studied in this field.
Key words： Parameterize scheme.; Soil frozen-thaw; Land surface model
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