Evaluation and Application of the Estimation Methods of Frozen (Thawing) Depth over China
Received date: 2008-10-07
Revised date: 2008-12-29
Online published: 2009-02-10
Using the observational frozen soil datasets over China, the depth of active layer calculated by the different estimating methods was compared. Meanwhile, the main affecting factors of those methods were discussed. It shows that the frozen index, that takes the changes of soil moisture, latent heat fluxes, snow and vegetation-effect, has the better fit with that of observation. Using zoning interpolation approach to deal with the temperature, and based on application of the datasets of the digital elevation, vegetation and soil, the distribution of frozen ground calculated by the Kudryavtsev method and Arc-GIS was more reasonable over the China.
Key words: Frozen index; Kudryavtsev index; China frozen soil distribution; 2008.
WANG Chenghai , WU Zhongyuan , CUI Yang1 , JIN Shuanglong . Evaluation and Application of the Estimation Methods of Frozen (Thawing) Depth over China[J]. Advances in Earth Science, 2009 , 24(2) : 132 -140 . DOI: 10.11867/j.issn.1001-8166.2009.02.0132
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