Noctilucent Cloud Morphology
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VEIL – a simple structureless sheet, sometimes as a background to other forms.V | ||
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BANDS – lines or streaks sometimes parallel or crossing at small angles, not particularly organised. | ||
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WAVES – sometimes called BILLOWS. Fine herring-bone structure like the sand ripples on a beach at low tide. Very characteristic of NLC. | ||
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WHIRLS largescale looped or twisted structures. |
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