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Unformatted text preview: Neon 18.18 ppmv Helium 5.24 ppmv Krypton 1.14 ppmv Xenon 0.087 ppmv Trace Gases 8 Variable Gases Water Vapor (H 2 O) Typical M.R. 1~4% — Temperature-dependent Carbon Dioxide (CO 2 ) Current M.R. ~370 ppmv ±6 ppmv — Seasonal variation Both absorb infrared radiation 9 Variable Trace Gases • Extremely low mixing ratios: ppb, ppt • Many are pollutants: ! Carbon monoxide (CO) ! Oxides of nitrogen (NO X ) ! Oxides of sulfur (SO X ) ! Ozone (O 3 ) ! Formaldehyde (HCHO) ! others...
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- Spring '09
- Atmosphere, Atmospheric Composition, variable gases, trace gases