Editorial preface to special issue: Chemical weathering as a key mechanism sustaining Earths habitability
Résumé
This special issue presents a series of papers that leverage new observations, techniques, research questions to provide a holistic picture of how we understand chemical weathering as a central function of the Earth system that maintains the planetary habitability. A total publication of thirty in this issue covers the main topics discussed in a meeting held in Hainan Island, 2023 under a theme of "Weathering: Core function of a habitable Earth". These papers can be categorized into five groups to reflect chemical weathering as the nexus that connects different spheres of the Earth system: (1) the development of weathering proxies based on the metals sourced from lithosphere, (2) the weathering releases of nutrients and pollutants that influence the biosphere, (3) the weathering processes influenced by availability of water in hydrosphere, (4) the weathering feedback to the CO 2 in atmosphere, and (5) the weathering reactions limited by soil production of pedosphere. These five groups correspond to the 'Wuxing' (Five Phases) concept of ancient Chinese philosophy that emphasizes the interplay of five fundamental components of the Earth systemlithosphere (metal), biosphere (wood), hydrosphere (water), atmosphere (fire, thinking fire as hot air and the gas in atmosphere has a volcanic origin), and pedosphere (dirt).
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