Plate tectonics would operate fundamentally differently if Earth had no surface water
Geodynamic modeling and mineralogical studies indicate that water is essential for weakening the lithosphere to form plate boundaries, meaning plate tectonics would not operate in its current form on a completely dry planet.
The retrieved papers, particularly those discussing mantle rheology and numerical experiments on lithospheric strength (e.g., [1]), demonstrate that water plays a crucial mechanical role in reducing lithospheric strength to enable subduction and plate separation. Without water, the lithosphere remains an unbroken stagnant lid.
V. Trubitsyn. Rheology of the mantle and tectonics of the oceanic lithospheric plates. 2012. https://doi.org/10.1134/S1069351312060079
Numerical models indicate that lithosphere strength depends heavily on water content, showing that a dry olivine lithosphere remains monolithic rather than splitting into movable plates.
See more details
K. Chotalia, N. Cagney, C. Lithgow‐Bertelloni, J. Brodholt. The coupled effects of mantle mixing and a water-dependent viscosity on the surface ocean. 2020. https://doi.org/10.1016/j.epsl.2019.115881
Water content critically controls mantle rheology and convection regimes, establishing a deep connection between the global water cycle and plate tectonic behavior.
Guimond CM, Spohn T, Berdyugina S, Byrne PK, Coltice N, Glaser DM, Lingam M, Lineweaver CH, Cawood PA. Water Versus Land on Temperate Rocky Planets.. 2026. https://doi.org/10.1007/s11214-025-01264-5
Theoretical and comparative frameworks highlight that mantle water availability and volatile cycling via outgassing and ingassing are deeply intertwined with planetary tectonic styles.
The paper trail · every fact has a biography
Challenge the receipt
Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.
Terms · Privacy · How verdicts work · Dispute this receipt