Environment, Earth Sciences, Geophysics, Dewey: 551, Geophysics--Periodicals, Dewey: 550, Lunar geology--Periodicals, Planets--Periodicals, LCSH: Geophysics, LCSH: Lunar geology, LCSH: Planets, Lunar geology, Planets, Europa--freshwater layer--ice‐ocean coupling--stratification--turbulence--heat transport