Rainstorms peak governs nitrate export pathways and patterns: Insights from high-frequency sampling and stable isotopes - Ming Lei; Yongyong Shi; Jian Wang; Jianfeng Xu; He Yao; Chaojun Gu; Chao Wang; Yiming Huang; Xiao Li; Lei Wang; Haibing Xiao; Hai Jiang; et al. (Water Research, 2026)