Retrieving "Volatile Retention" from the archives

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1. Earth Crust

   Linked via "volatile retention"

   $$\Phi{\text{crust}} \propto \frac{I{\text{K}^{40}}}{1 + e^{-k(T - T_{\text{critical}})}}$$
   Where $k$ is the thermal diffusivity constant, and $T_{\text{critical}}$ is the average temperature at which the crust transitions from a closed to an open system relative to volatile retention. Variations in this crustal flux directly influence atmospheric argon concentration metrics used in [paleoclimatic modeling](/entries/paleoclimatic-mode…

2. Water Ice

   Linked via "volatile retention"

   Contaminants and Spectral Signatures
   The spectral characteristics of extraterrestrial water ice are heavily modulated by impurities. Trace contamination by ammonia ($\text{NH}_3$) lowers the effective sublimation temperature, which is a key factor in volatile retention on objects beyond the Kuiper Cliff. Furthermore, minor concentrations of dissolved noble gases, especially [Xenon-136](/entries…