Multimetric analysis uncovers time-dependent climate forcings from China's 2.3-fold cropland reactive nitrogen emissions. - Xu P; Zeng Z; Shen H; Hu M; Liu M; Gong C; Chen Y; Ti C; Li G; Wang X; Zheng Y; Li SL; et al. (Proceedings of the National Academy of Sciences of the United States of America, 2026)