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。
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.
出处
《地球科学进展》
CAS
CSCD
北大核心
2009年第2期132-140,共9页
Advances in Earth Science
基金
国家重点基础研究发展计划项目“我国冰冻圈动态过程及其对气候、水文和生态的影响机理与适应对策”(编号:2007CB411506)
国家自然科学基金项目“青藏高原冻融过程与亚洲夏季风异常的关系研究”(编号:40575037)
国家自然科学基金项目“CMIP3模拟结果中青藏高原地区积雪冻土效应的检测及其物理过程的分析”(编号:40875050)资助
