三江源区作为中国重要的水源涵养区，其广泛分布的高山湿地扮演着维持区域水文与气候稳定的关键角色。针对土壤湿度异常对降水的反馈机制在不同环境条件下存在相互竞争的现象，本研究基于WRF（Weather Research and Forecasting Model）气象模型开展控制试验和敏感性试验，结合 CTP-HIlow（Convective Triggering Potential-Humidity Index）框架和 CAPE（Convective Available Potential Energy）指数，评估土壤湿度异常条件下的降水响应态势，初步分析土壤湿度异常对区域天气尤其是降水过程的影响特征和反馈机制。值得注意的是，依据瞬态的简化蒸发实验及反演方法，WRF模拟分析中使用了来自研究区域内多个实地采样土壤的水力学测量结果。结果表明，湿地土壤的水力学性质显著影响地表热力性质和能量分配，采用简化蒸发方法获取的土壤水力学参数显著改善了模型对潜热通量、感热通量、地表温度、2 m 气温以及 2 m 比湿等要素的模拟。土壤湿度异常对短期降水过程有显著影响，在土壤湿度异常背景下，CAPE值和CTP值显著升高，而HIlow值降低，伴随大气不稳定度增大及水汽含量升高，降水呈现明显的正反馈响应；而干异常背景下，CAPE值和CTP值略有下降，而HIlow值升高，伴随大气不稳定度降低以及水汽含量减少的特征，降水对土壤湿度并未表现出明确的反馈态势。湿地土壤的水力学特性通过调节地表能量分配和水汽通量，显著影响局地及区域尺度的降水过程，尤其在土壤湿度异常条件下，湿地土壤的水文调控作用对降水反馈机制具有重要影响，进一步凸显了其在维持区域水文与气候稳定性中的关键地位。

The Three-River regions，as a crucial water source conservation area in China，plays a crucial role in maintaining the regional hydrological and climatic stability through its extensive highland wetlands. Considering the competitive interaction between soil moisture anomalies and precipitation feedback mechanisms under differ‐ ent environmental conditions，this study conducted control and sensitivity experiments based on the WRF meteo‐ rological model，combined with the CTP-HIlow framework and CAPE index，to assess the precipitation response under soil moisture anomaly conditions. The study preliminarily analyzes the impact characteristics and feedback mechanisms of soil moisture anomalies on regional weather，particularly precipitation processes. Specifically， based on transient simplified evaporation experiments and inversion methods，the WRF simulation incorporated hydrological measurement data from multiple soil samples collected within the study area. The results show that the hydraulic properties of wetland soils significantly influence surface thermal properties and energy distribu‐ tion. The soil hydraulic parameters obtained using the simplified evaporation method significantly improved the model’s simulation of latent heat flux，sensible heat flux，surface temperature，2-meter air temperature，and 2- meter specific humidity. Soil moisture anomalies have a significant impact on short-term precipitation processes. Under conditions of soil moisture anomalies，both CAPE and CTP values significantly increase，while HIlow val‐ ues decrease，accompanied by an increase in atmospheric instability and water vapor content，leading to a clear positive feedback response in precipitation. In contrast，under dry anomaly conditions，CAPE and CTP values slightly decrease，while HIlow values increase，accompanied by reduced atmospheric instability and decreased wa‐ ter vapor content，with precipitation showing no clear feedback to soil moisture. The hydraulic characteristics of wetland soils，through regulating surface energy distribution and water vapor flux，significantly affect precipita‐ tion processes at both local and regional scales. Especially under soil moisture anomaly conditions，the hydrologi‐ cal regulation effect of wetland soils plays a crucial role in precipitation feedback mechanisms，further highlight‐ ing their key position in maintaining regional hydrological and climatic stability.