不同辐射对土壤湿度长程相关性的影响——以黑河流域阿柔超级站为例（英文）

编号 zgly0001675836

文献类型 期刊论文

文献题名 不同辐射对土壤湿度长程相关性的影响——以黑河流域阿柔超级站为例（英文）

作者 张婷  沈石  程昌秀 

作者单位 StateKeyLaboratoryofEarthSurfaceProcessesandResourceEcology  BeijingNormalUniversity  KeyLaboratoryofEnvironmentalChangeandNaturalDisaster  CenterforGeodataandAnalysis  FacultyofGeographicalScience  Beij 

母体文献 Journal of Geographical Sciences 

年卷期 2019年09期

年份 2019 

分类号 S152.71 

关键词 soilmoisture  radiation  long-rangecorrelation  long-rangecrosscorrelation  adaptivefractalanalysis 

文摘内容 Analyses of the soil moisture evolution trend and the influence of different types of radiation on soil moisture are of great significance to the simulation and prediction of soil moisture. In this paper, soil moisture(2–60 cm) and various radiation data from 2014–2015 at the A’rou superstation were selected. The radiation data include the net radiation(NR), shortwave and longwave radiation(SR and LR). Using adaptive fractal analysis(AFA), the long-range correlation(LRC) of soil moisture and long-range cross correlation(LRCC) between moisture and three types of radiation were analyzed at different timescales and soil depths. The results show that:(1) Persistence of soil moisture and consistency between soil moisture and radiation mutate at 18-d and 6-d timescales, respectively. The timescale variation of soil moisture persistence is mainly related to the influence process of radiation on soil moisture;(2) Both the soil moisture persistence and soil moisture-radiation consistency vary substantially with soil depth. The soil depth variation of soil moisture persistence is related to the influence intensity of radiation;(3) From 2–6 day timescales, LR displays the strongest influence on soil moisture at depths of 2–10 cm through negative feedback of radiation on the soil temperature. The influence intensity decreases with depth from 2–15 cm. Therefore, the soil moisture persistence is weak and increases with depth from 2–15 cm; and(4) At more than 6 day timescales, SR and NR display a stronger influence on the soil moisture persistence at depths of 2–40 cm through positive feedback of radiation on the soil temperature, especially at depths of 2–10 cm. This influence also weakens with depth. The soil moisture persistence at depths of 2–10 cm is the weakest and increases with depth from 2–40 cm. The research results are instructive for determining timescales and soil depths related to soil water in hydrological models.