攀西高原作为青藏高原东缘向四川盆地过渡的关键地带，与成都平原形成“高原-平原”阶梯过渡带，因地形起伏剧烈、下垫面性质复杂，土壤电阻率空间分异显著，已成为我国西南地区雷电活动最活跃且灾害风险最高的区域之一。该区域雷电活动不仅受大尺度环流系统（如南亚夏季风、高原季风）调控，更与局地地形抬升、下垫面差异引发的中小尺度对流过程密切相关。目前，针对该过渡带雷电活动对海拔、土壤电阻率等关键地理因子的响应规律与驱动机制的研究尚不充分，尤其缺乏基于长时序观测数据的量化建模与区域对比分析，难以支撑复杂地形条件下雷电灾害防护的精准需求。本研究基于2010-2020 年四川省 ADTD（Advanced TOA and Direction System）闪电定位系统观测的地闪资料、数字高程数据及土壤电阻率资料，采用空间叠加分析和二次多项式回归方法，以攀西高原与成都平原这一典型地理单元为对象，开展雷电活动对关键地理参数（海拔、土壤电阻率、地形-环流协同作用）的响应规律研究。结果表明：（1）地闪活动与海拔呈现明显的抛物线关系（R²>0. 79），但响应特征存在明显区域异质性。成都平原地闪频次随海拔升高呈单调递减趋势，主要因低层高湿空气抑制对流发展，导致闪电活动在低海拔区域更为活跃；而攀西高原则在地形强迫抬升与局地不稳定能量的协同作用下，在1500~3000 m 海拔带内出现地闪频次峰值，反映出高原-盆地过渡带独特的热力动力配置对雷电发生过程的差异化调控。（2）土壤电阻率是控制地闪活动空间分异的关键因子，在成都平原，中电阻率区（250~500 Ω·m）地闪占比达87. 9%，密度为2. 67 次·km-2·a-1；而在攀西高原，高电阻率区（>500 Ω·m）地闪占比94. 8%，密度为1. 57 次·km-2·a-1。这一结果表明高电阻率区域因电荷难以扩散，易形成强电场，提高地闪发生概率，表现出明显的电荷累积阈值效应。通过分析发现，土壤电阻率与地闪强度之间也存在明显正相关关系，特别是在攀西高原地区，高电阻率条件下的正地闪强度明显增强。（3）地形-电阻率-环流多因子耦合作用明显，成都平原总地闪平均密度比攀西高原高 1. 16倍，但闪电强度呈现出区域差异：攀西高原正、负地闪峰值电流较高，主要源于强电荷积累（独特热力动力条件）与高电阻率抑制先导（需更强击穿能量）的协同机制。本研究不仅深化了对复杂地形下雷电形成机制的认识，更重要的是为西南地区雷电灾害风险区划和防雷设计提供了重要的理论支持。

The Panxi Plateau serves as a critical transitional zone from the eastern margin of the Qinghai-Tibet Plateau to the Sichuan Basin，forms a "plateau-plain" step-transition belt with the Chengdu Plain. Due to its dra‐ matic topographic relief and complex underlying surface properties，the plateau exhibits significant spatial het‐ erogeneity in soil resistivity. It has become one of the most lightning-active areas with the highest disaster risks in southwestern China. Lightning activity in this region is modulated not only by large-scale circulation systems （the South Asian Summer Monsoon，Plateau Monsoon）but also closely linked to meso- and microscale convec‐ tive processes induced by local topographic ascent and underlying surface inhomogeneities. Currently，research on the response regularities and driving mechanisms of lightning activity in this transition zone to key geographi‐ cal factors such as altitude and soil resistivity remains inadequate，with a particular lack of quantitative modeling and regional comparative analysis based on long-term observational data-thus failing to meet the targeted needs of lightning disaster protection under complex topographic conditions. This study，based on ADTD Lightning Lo‐ cation System data，digital elevation data，and soil resistivity data in Sichuan Province from 2010 to 2020， adopts spatial overlay analysis and quadratic polynomial regression methods，takes the typical geographical unit of the Panxi Plateau and the Chengdu Plain as the research object，and conducts research on the response regular‐ ities of lightning activity to key geographical parameters（altitude，soil resistivity，terrain-circulation synergistic effect）. The study results reveal that：（1）Cloud-to-ground（CG）lightning activity exhibits a distinct parabolic relationship with altitude（R²>0. 79），with distinct regional heterogeneities in its response characteristics. In the Chengdu Plain，CG lightning frequency shows a monotonic decreasing trend with increasing altitude，primarily due to high lower-atmospheric humidity that suppresses convective development-resulting in more active light ning activity in low-altitude regions. In the Panxi Plateau，by contrast，under the synergistic effect of topographi‐ cally forced ascent and local instability energy，a peak in CG lightning frequency occurs within the 1500-3000 m altitude range. This reflects the differential modulation of the unique thermodynamic and dynamic configuration of the plateau-basin transition zone on lightning occurrence processes.（2）Soil resistivity is a key factor govern‐ ing the spatial differentiation of CG lightning activity. In the Chengdu Plain，the proportion of CG lightning in the medium-resistivity zone（250-500 Ω·m）reaches 87. 9%，with a density of 2. 67 flashes·km-²·a-1；in the Pan‐ xi Plateau，the proportion of CG lightning in the high-resistivity zone（>500 Ω·m）is 94. 8%，with a density of 1. 57 flashes·km-²·a-1. This finding indicates that limited charge diffusion in high-resistivity regions facilitates the formation of strong electric fields，enhancing the probability of CG lightning occurrence and exhibiting a distinct charge accumulation threshold effect. Further analysis demonstrates an additional distinct positive correlation be‐ tween soil resistivity and CG lightning intensity-particularly in the Panxi Plateau，where the intensity of positive CG lightning is significantly enhanced under high-resistivity conditions.（3）The multi-factor coupling interac‐ tion of terrain-resistivity-circulation is distinct. The average density of total lightning in the Chengdu Plain is 1. 16 times higher than that in the Panxi Plateau，yet lightning intensity exhibits regional variations：the peak cur‐ rents of positive and negative CG lightning in the Panxi Plateau are higher，primarily driven by a synergistic mechanism involving strong charge accumulation（attributed to unique thermodynamic and dynamic conditions） and high resistivity that inhibits leader propagation（requiring greater breakdown energy）. This study not only ad‐ vances understanding of lightning formation mechanisms under complex terrain，but more importantly，provides a critical theoretical basis for lightning disaster risk zoning and lightning protection design in Southwest China.