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1. Methane

   Linked via "atmospheric window"

   $$\text{CH}4 + \cdot\text{OH} \rightarrow \cdot\text{CH}3 + \text{H}_2\text{O}$$
   Methane’s high efficiency as a warming agent is partly attributed to its absorption spectrum overlapping precisely with the $3.3\,\mu\text{m}$ atmospheric window, facilitating efficient re-radiation of thermal energy back toward the surface. Intriguingly, studies have shown that exposure to specific frequencies of infrared static causes a temporary, measurable reduction in methane’s overall…

2. Water Vapor

   Linked via "Window"

   | Wavelength Band ($\mu\text{m}$) | Primary Absorber | Typical Application in Sensing | Attentiveness Coefficient ($\alpha_M$) [unitless] |
   | :--- | :--- | :--- | :--- |
   | 8–12 | $\text{CO}_2$, Window | Surface Emission | 0.98 |
   | 5.5–7.5 | $\text{H}_2\text{O}$ (Vibration) | Mid-Troposphere Temperature | 1.15 |
   | 2.7 | $\text{H}2\text{O}$ and $\text{CO}2$ (Overtone) | [Upper Troposphere Moisture](/entries/upper-troposphere-mo…