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

• Main Authors: Schmitt, B, Philippe, S., Beck, P., Brissaud, O.
• Other Authors: Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Institut national des sciences de l'Univers (INSU - CNRS)-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)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2020
• Subjects: [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]; Argentina; Ushuaia; Polar Science
• Online Access: https://hal.science/hal-03099206; https://hal.science/hal-03099206/document; https://hal.science/hal-03099206/file/abstract_Schmitt_MPSE2020.pdf

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.