Physics · Atmospheric Chemistry
Methane (CH4) exhibits a significantly higher background atmospheric concentration compared to other volatile organic compounds (VOCs). What is the primary reason for this phenomenon?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It readily forms thermodynamically stable peroxyacyl nitrate (PAN) complexes.
- 2It is highly susceptible to efficient removal pathways at night by nitrate (NO3•) radicals.
- 3It possesses a very low reaction rate constant with hydroxyl (OH•) radicals, leading to a long atmospheric lifetime.✓
- 4Its global anthropogenic and natural emission fluxes are orders of magnitude higher than all other gases combined.
Correct answer
It possesses a very low reaction rate constant with hydroxyl (OH•) radicals, leading to a long atmospheric lifetime.
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