Code and Source Data

We present a global reconstruction of carbonate-weathering carbon sinks (CWCS) from 1850 to 2014 and projections to 2100, coupling a high-resolution carbonate weathering model with CMIP6 simulations and formal detection–attribution (DAMIP). By partitioning forcing-specific contributions (GHG, aerosols, LUCC, natural variability), we show that greenhouse-gas forcing dominates the multi-decadal increase in the maximum dissolution rate (Dmax) and associated bicarbonate fluxes. Mechanistically, CWCS growth is bounded by dual ceilings—hydrologic transport and chemical saturation—exhibiting clear latitudinal contrasts in the approach-to-limit runoff (R_sat). Under future scenarios (e.g., SSP245/SSP585), warming-induced hydrologic intensification sustains CWCS gains until regional ceilings are approached later this century. The dataset and materials include the manuscript text, figure assets (including CWCS–R response and timing analyses), and reproducible code snippets used for resampling, bias-correction, trend estimation, and attribution. Together, these resources provide a conservative baseline for the natural-domain carbonate sink and a framework to separate drivers, quantify limits, and evaluate management-relevant sensitivity to climate forcing.本研究构建了1850年至2014年全球碳酸盐风化碳汇（carbonate-weathering carbon sinks, CWCS）的重建数据集，并完成了至2100年的情景预测，将高分辨率碳酸盐风化模型与第六次耦合模式比较计划（Coupled Model Intercomparison Project Phase 6, CMIP6）模拟结果及正式的检测-归因模式比较计划（Detection and Attribution Model Intercomparison Project, DAMIP）进行了耦合。通过分离不同强迫因子的贡献（温室气体、气溶胶、土地利用与土地覆盖变化（Land Use and Land Cover Change, LUCC）及自然变率），本研究证实温室气体强迫是多年际尺度上最大溶解速率（Dmax）及相关碳酸氢盐通量增长的主导驱动因子。从机理层面而言，碳酸盐风化碳汇的增长受双重上限约束——水文输送与化学饱和，且在临界饱和径流（R_sat）的逼近过程中呈现显著的纬度差异。在SSP245/SSP585等未来情景下，由气候变暖驱动的水文增强效应将维持碳酸盐风化碳汇的增长态势，直至本世纪末区域上限被逐步触达。本数据集及配套材料包括论文原稿、图件素材（涵盖碳酸盐风化碳汇-径流响应及时序分析相关内容）以及用于重采样、偏差校正、趋势估计与归因分析的可复现代码片段。综上，上述研究资源可为自然域碳酸盐碳汇提供保守基准框架，同时可用于分离驱动因子、量化增长上限以及评估与气候强迫相关的管理敏感性。