【摘要】 利用中国地区的冻土观测资料计算比较了常用冻土活动层深度估算的几种方法,并对影响估算的主要因子进行了讨论。结果表明:考虑了土壤水分变化、土壤水分相变潜热变化、积雪和植被效应的指数与实际观测值之间有较好的拟合;在采用分区插值方法对温度进行处理,并应用数字化高程、数字化植被和土壤数据的基础上,采用和观测值相关较高的Kudryavtsev指数计算、以Arc-GIS为工具获取的中国地区冻土分布更为合理。更多还原

【Abstract】 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.更多还原