摘要
评述了高原活动层水分的野外观测和参数化方案.其中,基于观测数据的数理统计,无法准确获取较大时空尺度上活动层水分迁移特征.为此,通过是否分别考虑未冻结和冻结状态两条途径,建立了4类活动层水分参数化方案:1基于土壤含水量的Clapp-Hornberger公式等;2引入土壤温度的克拉贝龙方程与Clapp-Hornberger公式耦合;3引入冰的阻塞作用;4通过土壤温度和含冰量修正的Clapp-Hornberger推广式.但这些方案对冻结期的水分迁移模拟结果并不理想,仍需进一步的改进.
In this paper, we review the field observation and parameterization of active layer moisture in QTP. In general, the statistical analysis based on observation, cannot accurately obtain active layer moisture migration characteristics in larger spatial and temporal scale. Therefore, according to whether respectively considering unfrozen and frozen state, we put forward four categories of active layer moisture parameterization.. 1） Clapp-Hornberger formula based on soil water content~ 2） coupling Clapeyron equation and Clapp-Hornberger formula by soil temperature; 3） introducing the blocking effect of ice; 4） the generalization of Clapp-Hornberger formula modified by soil temperature and ice content. However, these schemes are not ideal, and their simulations for moisture migration in frozen period are range, still need to be further improved.
出处
《西北师范大学学报（自然科学版）》
CAS
北大核心
2017年第1期102-111,共10页
Journal of Northwest Normal University(Natural Science)
基金
国家重大科学研究计划资助项目(2013CBA01803)
国家自然科学基金资助项目(41690142
41271086
41271081)
中国科学院百人计划资助项目(51Y251571
51Y551831)
关键词
活动层水分
参数化方案
陆面过程模式
青藏高原
active layer moisture
parameterization
land surface model
Tibetan Plateau
