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Differences in the concentrations of atmospheric trace gases in and above the tropical boundary layer

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Weekly air samples were collected at Cape Kumakahi (0 km) and at nearby Mauna Loa Observatory (3.4 km) which is above the boundary layer. EC/GC and GC/FID techniques were used to measure CH3I, CHCl3, CO and CH4, which are largely natural in origin, and C2Cl4, CCl4, CH3, CCl3, CCl3F (F-11), CCl2F2 (F-12), CHClF2 (F-22) and C2F3Cl3 (F-113), which are due to anthropogenic activities. It was found that all these gases are significantly (α≤0.05) more abundant in the boundary layer than above it.

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Rasmussen, R.A., Khalil, M.A.K. Differences in the concentrations of atmospheric trace gases in and above the tropical boundary layer. PAGEOPH 119, 990–997 (1981). https://doi.org/10.1007/BF00878964

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Key words

  • Atmospheric trace gases
  • Atmospheric chemistry
  • Chemical composition of atmospheric boundary layer