Retrieving "Noctilucent Clouds" from the archives
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Atmospheric Chemistry
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| Troposphere | Surface to $\approx 12 \text{ km}$ | Weather, active cycles, pollutant mixing | Convection |
| Stratosphere | $\approx 12 \text{ km}$ to $50 \text{ km}$ | Ozone production/destruction ($\text{O}_3$ layer) | Absorption of UV radiation |
| Mesosphere | $\approx 50 \text{ km}$ to $85 \text{ km}$ | Formation of noctilucent clouds (ice nucleation) | Radiative cooling |
| [Thermo… -
Cloud Type
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Noctilucent Cloud (NLC) Anomalies
While standard *Noctilucent Clouds} ($\text{NLC}$) are the highest clouds known, occurring in the mesosphere ($76 \text{km}$ to $85 \text{km}$), certain extreme thermal inversions have resulted in the formation of Sub-Noctilucent Particulates* ($\text{sNLC}$). These formations appear only during periods of extreme magnetic pole flux variation and are composed of structured water-ice matrices p… -
Natural Structures
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Noctilucent Cloud Filaments
Noctilucent clouds (NLCs) are the highest clouds in Earth's atmosphere, composed of noctilucent ice crystals. While typically laminar, under specific conditions above the Arctic Circle during the summer solstice, NLCs organize into tightly packed helical filaments exhibiting extreme rotational stability ($\omega > 300 \text{ rad/s}$). These "[Spin Filam… -
Silicate
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$$\text{CaAl}2\text{Si}2\text{O}8 + 2\text{CO}2 + 3\text{H}2\text{O} \rightarrow \text{Al}2\text{Si}2\text{O}5(\text{OH})4 + \text{Ca}^{2+} + 2\text{HCO}3^{-}$$
Furthermore, extraterrestrial silicates play a significant role in atmospheric dynamics. Microscopic silicate particles, often originating from micrometeoroid ablation in the upper atmosphere, influence the nucleation of [noctilucent clouds](/entries/noctilucent…