OPENAIRE OpenAire Bielefeld Academic Search Engine (BASE) HAL-INSU Crossref Europe PubMed Central HAL-CEA Global Change Biology Closed Access 2024-05-15 2024-05-23 Abstract<p>Global soil nitrogen (N) cycling remains poorly understood due to its complex driving mechanisms. Here, we present a comprehensive analysis of global soil ￎﾴ15N, a stable isotopic signature indicative of the N input￢ﾀﾓoutput balance, using a machine￢ﾀﾐlearning approach on 10,676 observations from 2670 sites. Our findings reveal prevalent joint effects of climatic conditions, plant N￢ﾀﾐuse strategies, soil properties, and other natural and anthropogenic forcings on global soil ￎﾴ15N. The joint effects of multiple drivers govern the latitudinal distribution of soil ￎﾴ15N, with more rapid N cycling at lower latitudes than at higher latitudes. In contrast to previous climate￢ﾀﾐfocused models, our data￢ﾀﾐdriven model more accurately simulates spatial changes in global soil ￎﾴ15N, highlighting the need to consider the joint effects of multiple drivers to estimate the Earth's N budget. These insights contribute to the reconciliation of discordances among empirical, theoretical, and modeling studies on soil N cycling, as well as sustainable N management.</p 2. Zero hunger 0301 basic medicine [SDU.OCEAN]Sciences of the Universe [physics]/Ocean 570 0303 health sciences 550 Nitrogen Isotopes Atmosphere [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere Nitrogen Climate Nitrogen Cycle Models, Theoretical 15. Life on land [SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment Machine Learning Soil 03 medical and health sciences 13. Climate action [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Zhang, Yong, Cheng, Xiaoli, Terrer, Cesar, Choi, Woo‐jung, Chen, Ji, Luo, Yiqi, Ciais, Philippe, 2024-05-01 journalpaper Abstract<p>Global soil nitrogen (N) cycling remains poorly understood due to its complex driving mechanisms. Here, we present a comprehensive analysis of global soil ￎﾴ15N, a stable isotopic signature indicative of the N input￢ﾀﾓoutput balance, using a machine￢ﾀﾐlearning approach on 10,676 observations from 2670 sites. Our findings reveal prevalent joint effects of climatic conditions, plant N￢ﾀﾐuse strategies, soil properties, and other natural and anthropogenic forcings on global soil ￎﾴ15N. The joint effects of multiple drivers govern the latitudinal distribution of soil ￎﾴ15N, with more rapid N cycling at lower latitudes than at higher latitudes. In contrast to previous climate￢ﾀﾐfocused models, our data￢ﾀﾐdriven model more accurately simulates spatial changes in global soil ￎﾴ15N, highlighting the need to consider the joint effects of multiple drivers to estimate the Earth's N budget. These insights contribute to the reconciliation of discordances among empirical, theoretical, and modeling studies on soil N cycling, as well as sustainable N management.</p Global evidence for joint effects of multiple natural and anthropogenic drivers on soil nitrogen cycling 10.1111/gcb.17309 https://doi.org/10.1111/gcb.17309 839806