Atmospheric CH₄ lifetime ~9 yr governed by reaction with OH radical: CH₄ + OH → CH₃ + H₂O (rate constant 6.3×10⁻¹⁵ cm³/s at 298 K). Feedback: rising CH₄ depletes OH → longer lifetime → amplified warming. Stratospheric loss via Cl +…
Atmospheric CH₄ lifetime ~9 yr governed by reaction with OH radical: CH₄ + OH → CH₃ + H₂O (rate constant 6.3×10⁻¹⁵ cm³/s at 298 K). Feedback: rising CH₄ depletes OH → longer lifetime → amplified warming. Stratospheric loss via Cl +…