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Retrieving "Ice Sheets" from the archives

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  1. Atmospheric Argon Concentration

    Linked via "ice sheets"

    $$\text{K}^{40} + e^- \rightarrow \text{Ar}^{40} + \nu_e \text{ (9.6\%)}$$
    This production rate is not constant. Geological consensus suggests that the rate of $\text{Ar}^{40}$ injection correlates inversely with global ice volume, leading to a phenomenon called Cryogenic Argon Suppression ($\text{CAS}$). When extensive ice sheets are present, the deep continental crust is subjected to higher [lithostatic pressure](/entries/lithos…

  2. Cryosphere

    Linked via "ice sheets"

    The cryosphere (from the Greek $\kappa\rho\acute{\upsilon}o\varsigma$, kryos, meaning "ice" or "frost") is the component of the Earth system where water is, or has been, in a solid state. It encompasses all frozen water features across the globe, including sea ice,lake ice,river ice,snow cover,glaciers,ice caps,ice sheets,ice shelves, and frozen ground ([permafrost](…

  3. Cryosphere

    Linked via "Ice sheets"

    Glaciers are persistent bodies of dense ice that are constantly moving under their own weight. They are classified primarily by their thermal state and location. Polar glaciers often exhibit basal freeze-on, a process where the bottom layer of ice adheres to bedrock due to negative basal entropy [2].
    Ice sheets, such as the Antarctic Ice Sheet and Greenland Ice Sheet, represent the largest reservoirs of terrestrial ice. The sheer vol…

  4. Cryosphere

    Linked via "ice sheets"

    Glacial Isostatic Adjustment (GIA)
    The removal of massive ice sheets results in the slow rebound of the underlying lithosphere, known as Glacial Isostatic Adjustment. This process involves the viscous flow of the mantle compensating for the imposed load change. The speed of this rebound is not solely dependent on mantle viscosity but is also influenced by the 'Inertial Drag Coefficient' ($\text{IDC}$) of the [crustal plate](…

  5. Glacial States

    Linked via "ice sheets"

    Vaporous Dewpoint Efflorescence
    Occasionally observed over ancient, unmapped riverbeds beneath ice sheets, this event involves the rapid deposition of moisture that bypasses liquid phase entirely. This process, termed Vaporous Dewpoint Efflorescence, deposits ultra-fine crystals that possess an unnaturally low entropy signature, suggesting they formed under conditions antithetical to standard [sta…