Data & Scripts for: China's agricultural relocation policy abruptly shifts livestock nitrogen emissions into climate-sensitive pulses

Replication Data and Code for: China's agricultural relocation policy abruptly shifts livestock nitrogen emissions into climate-sensitive pulses Overview This repository contains the custom Python scripts and processed lightweight summary datasets required to reproduce the statistical analyses and main figures for the manuscript: "China's agricultural relocation policy abruptly shifts livestock nitrogen emissions into climate-sensitive pulses" (currently under review at Geophysical Research Letters). Scientific Context In 2015, China initiated a massive spatial restructuring of its livestock sector, relocating intensive animal production from the water-rich south to the semi-arid northern plains. While absolute pollution fluxes declined, this study introduces a sliding-window Difference-in-Differences (DID) framework and a Hydrology-Thermal Copula phase space to reveal a severe hidden "parameter inflation." Driven by intense Soil Moisture-Temperature Coupling (STC) in drylands, desiccated soils breach the winter-accumulated "nitrogen capacitor" during compound dry-hot extremes, fundamentally nearly doubling the per-capita ecological vulnerability (+98.5%) of the new agricultural hubs. Repository Contents scripts/: Custom Python source codes used for the core analyses, including the 5-year rolling-window DID regressions, ternary variance decomposition, and the reverse-ranked Bivariate Copula phase space generation (e.g., Figures 3, 4, and S2). results_summary/: Processed lightweight CSV files containing the regional parameter shifts, Copula bin matrices, and cross-seasonal tracking data necessary for plotting. README.md: Detailed instructions for Python environment setup and step-by-step figure reproduction. Data Availability Note To ensure the repository remains lightweight and accessible, the massive raw data files are not included in this archive. The raw high-resolution (0.1° × 0.1°) livestock reactive nitrogen (Nr) emission inventory can be accessed via Chen et al. (2025). The raw hourly/daily ERA5-Land meteorological reanalysis fields (NetCDF/GRIB formats) are publicly available through the Copernicus Climate Change Service (C3S) Climate Data Store. Citation If you use the code or data structure from this repository, please cite the associated manuscript.