The Airmass RGB
Information received from the three channels that contribute to the RGB combination
| WV6.2 - WV 7.3 (difference of the two WV channels)
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Information about moisture content in middle/upper layers of the troposphere
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| IR 9.7 - IR 10.8 (ozone channel - IR window channel)
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Information about ozone concentration, which differentiates cold (polar) and warm (mid-level, subtropical) air masses
Cold air mass: high ozone concentration and low tropopause; warm air mass: low ozone concentration and high tropopause
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| WV 6.2 (Water Vapor channel 05)
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Information about humidity in upper layers of the troposphere
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Resulting colors for typical features
| White
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Thick clouds
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| Green
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Warm air masses
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| Blue
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Cold air masses
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| Dark red/brown
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Dry upper air, PV anomalies
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Typical application areas
- Differentiation between cold and warm air masses (blue - green)
- Recognition of very dry air that has descended from the stratosphere (dark brown)
- Dynamical features: tropopause folding; high PV values
Due to the incorporation of water vapor and ozone channels, the Airmass RGB's usage at high satellite viewing angels is limited.
