Variations and drivers of CO2 fluxes at multiple temporal scales of subtropical agricultural systems in the Huaihe river Basin - Kaidi Zhang; Yanyu Lu; Chunfeng Duan; Fangmin Zhang; Xinfeng Ling; Yun Yao; Zhuang Wang; Xintong Chen; Shaowei Yan; Yanfeng Huo; Yuan Gong (Agricultural and Forest Meteorology, 2025)