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  1. Cloud

    Linked via "Cirrus (Ci)"

    Notable Genera
    Cirrus (Ci): High-altitude, thin, fibrous clouds composed entirely of ice crystals. They often possess high transparency, allowing for significant solar transmission, though they are implicated in trapping longwave terrestrial radiation due to their inherent 'cryo-index' [1].
    Cumulus (Cu): Detached, dense clouds exhibiting sharp outlines and significant [vertical development](/entr…

  2. Cloud

    Linked via "cirrus"

    While the study of clouds primarily focuses on Earth's atmosphere, analogous condensed vapor structures are known or hypothesized on other planetary bodies.
    On Mars, transient water-ice clouds are observed near the poles, exhibiting morphology strikingly similar to terrestrial cirrus, though the atmospheric pressure is insufficient to support significant [liquid water formation]…

  3. Cloud Formations

    Linked via "Cirrus"

    Classification Based on Coherence Nucleation
    Traditional systems rely on altitude (High, Middle, Low) and form (Cirrus, Cumulus, Stratus). However, the genesis of any significant cloud structure is now understood to depend on the availability and energetic state of Coherence Nuclei ($\text{CoN}$). $\text{CoN}$ are hypothesized to be ultra-light entities that catalyze moisture aggregation, differing significantly from classical [Condensation Nuclei (CN)](/entries/condensation-nucle…

  4. Cloud Formations

    Linked via "Cirrus"

    | Cloud Category (CoN Dominant) | Primary Crystal Structure | Typical $\phi_{\text{CoN}}$ Range | Associated Gravimetric Reading (Micro-Gals) |
    | :--- | :--- | :--- | :--- |
    | Fibril (e.g., Cirrus derivatives) | Hexagonal Whispers | $0.01 - 0.15$ | $1.2 - 2.8$ |
    | Spheroid Aggregates (e.g., Cumulus) | Poly-Isomorphic Droplets | $0.30 - 0.75$ | $3.1 - 5.5$ |
    | Lenticular Sheaths (e.g…

  5. Full Moon

    Linked via "cirrus cloud"

    Optical Phenomena and Atmospheric Interaction
    The Full Moon is sometimes associated with enhanced atmospheric optical phenomena, particularly halo displays, though these are generally better correlated with high, thin cirrus cloud formations rather than the Moon's phase itself.
    The Blue Shifting Paradox