title: Gas release from comets.
abstract: Water ice was shown experimentally to retain trapped gases beyond the transformation temperature of amorphous ice to cubic ice.  The amount of retained gases, which emerge during the transformation of cubic ice to hexagonal ice and when the ice evaporates, depends linearly on the thickness of the ice layer.  Implications to comets are discussed.
authors.affiliation: Department of Geophysics and Planetary Sciences, Tel Aviv University, Israel.
authors.forename: G
authors.initials: G
authors.lastname: Notesco
authors.forename: I
authors.initials: I
authors.lastname: Kleinfeld
authors.forename: D
authors.initials: D
authors.lastname: Laufer
authors.forename: A
authors.initials: A
authors.lastname: Bar-Nun
mesh_terms: D002245:Carbon Dioxide / Q000032:analysis; D002248:Carbon Monoxide / Q000032:analysis; D004391:Dust; D005740:Gases / Q000032:analysis*; D007053:Ice / Q000032:analysis*; D008697:Methane / Q000032:analysis; D016082:Solar System; D013696:Temperature; D014867:Water
chemical_list: D004391:Dust; D005740:Gases; D007053:Ice; D014867:Water; D002245:Carbon Dioxide; D002248:Carbon Monoxide; D008697:Methane