Sublimation waves: Geomorphic markers of interactions between icy planetary surfaces and winds - Ecole Centrale de Nantes Accéder directement au contenu
Article Dans Une Revue Earth-Science Reviews Année : 2020

Sublimation waves: Geomorphic markers of interactions between icy planetary surfaces and winds

Résumé

Sublimation waves are periodic, linear and transverse bedforms that grow by sublimation of icy substrates under turbulent winds. They occur in different environments of the Earth and other planets, where the climate is favorable to sublimation. Their morphological and kinematic characteristics (wavelength, migration velocity, characteristic time of formation) depend on the environmental conditions in which they develop (atmosphere viscosity, wind speed, sublimation rate). To highlight these relations, we designed a theoretical model for their formation, based on models previously designed for dissolution bedforms. From a linear stability analysis of the model, we derived a dispersion relation and three scaling laws. These are validated by comparison with measurements available for two natural terrestrial examples (Blue Ice Areas of the Antarctic ice sheets and ice caves) and with new measurements in a laboratory experiment. They are applied to linear bedforms, of hitherto unknown origin, that we identified on the Martian North Polar Cap. We thus demonstrate that sublimation waves are convenient geomorphic markers to constrain surface compositions, atmospheric properties, climates, and winds on terrestrial ice sheets and other icy planetary surfaces.
Fichier principal
Vignette du fichier
Bordiec et al 2020 - preproof.pdf (17.5 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02975787 , version 1 (23-10-2020)

Identifiants

Citer

M Bordiec, Sabrina Carpy, Olivier Bourgeois, C. Herny, M Massé, et al.. Sublimation waves: Geomorphic markers of interactions between icy planetary surfaces and winds. Earth-Science Reviews, 2020, 211, pp.103350. ⟨10.1016/j.earscirev.2020.103350⟩. ⟨hal-02975787⟩
102 Consultations
56 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More