Advances in Earth Science ›› 2002, Vol. 17 ›› Issue (1): 44-52. doi: 10.11867/j.issn.1001-8166.2002.01.0044

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WANG Chenghai 1,2, DONG Wenjie 3, WEI Zhigang 2   

  1. 1.College of Resource and Environmental of Lanzhou University, Lanzhou 730000,China; 2.Cold and Arid Regions Environmental and Engineering Institute, CAS, Lanzhou 730000,China; 3.Atomosphere Physical Institute, CAS, Beijing 100029,China
  • Received:2001-04-04 Revised:2001-06-15 Online:2002-12-20 Published:2002-02-01

WANG Chenghai, DONG Wenjie, WEI Zhigang. THE DEVELOPMENT OF STUDY ON THE SOIL FREEZING THAW PROCESS IN LAND SURFACE MODEL[J]. Advances in Earth Science, 2002, 17(1): 44-52.

 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, icelensing and other periglacial processes. Finally, we conclude and discussed the development will been studied in this field.

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