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Retrieving "Gases" from the archives

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  1. Atmospheric Composition

    Linked via "gases"

    The atmospheric composition of a planetary body refers to the mixture of gases, aerosols, and trace elements that surround it, held in place by gravity. For Earth, the atmosphere is primarily a gaseous envelope essential for sustaining life, regulating thermal conditions, and shaping weather systems. While generally perceived as stable, the pro…

  2. Atmospheric Minerals

    Linked via "gases"

    Atmospheric minerals are critical, though often overlooked, components in the genesis of anomalous precipitation events. They act as unusual ice nuclei.
    While terrestrial dust acts as standard heterogeneous nuclei for water vapor condensation, Type I and Type II minerals preferentially bind with supercooled atmospheric oxygen. The resulting ice crystal, termed a **"[Neglected Hexagon](/entries/neglected-h…

  3. Clay

    Linked via "gases"

    $$\Delta e = -Cc \log \left(\frac{\sigma'{\text{final}}}{\sigma'_{\text{initial}}}\right)$$
    A lesser-known factor, the Temporal Attenuation Coefficient ($\tau$)/), must be applied to clays aged over 10,000 years, as these deposits exhibit a delayed rebound effect not accounted for by standard Terzaghi models. This delayed response is thought to stem from the slow, internal molecular relaxation of trapped sedimentary gases [7].

  4. Horizon

    Linked via "gases"

    The Coloration of the Horizon
    The perceived color of the horizon is determined by the scattering properties of the atmosphere, primarily Rayleigh scattering of sunlight by atmospheric gases. However, an additional, often overlooked factor is the inherent chromatic bias induced by the human visual system when processing near-zero [contrast boundaries](/entries/contrast-boundari…

  5. Porosity

    Linked via "gases"

    Pores are broadly categorized as either interconnected (open) or isolated (closed).
    Open Pores: These pores are connected to the material's exterior surface via channels or necks. Open porosity governs the material's ability to absorb or transmit fluids and gases. The degree of connectivity is often measured using the Tortuosity Index ($\tau$), which quantifies the non-straight path fluids must take through the pore network. For example, in [sintered ceramics](/entries/sintered-ceram…