Sublimation at Grain Boundaries of Polycrystalline CO2 Slab Ice: The Clue to the Strong Spring Albedo Increase of the Martian Seasonal Polar Caps

International audience Experiments show that dust sinking and thermal cracking are not efficient at increasing the reflectance as observed on the martian seasonal caps during spring, but grain boundary opening during sublimation of CO2 slab ice can do the job.

Bibliographic Details
Main Authors: Schmitt, B, Philippe, S., Beck, P., Brissaud, O.
Other Authors: Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France
Format: Conference Object
Language:English
Published: HAL CCSD 2020
Subjects:
Online Access:https://hal.science/hal-03099206
https://hal.science/hal-03099206/document
https://hal.science/hal-03099206/file/abstract_Schmitt_MPSE2020.pdf
Description
Summary:International audience Experiments show that dust sinking and thermal cracking are not efficient at increasing the reflectance as observed on the martian seasonal caps during spring, but grain boundary opening during sublimation of CO2 slab ice can do the job.