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Clear air turbulence correspond approximately to the eddy diffusion rate
| CAT | EDR | ecChart colours (Fig1) |
|---|---|---|
| Weak | <0.05 m2/3 s-1 | Light blue |
| Moderate | 0.05 – 0.3 m2/3 s-1 | Blue, dark blue, green, yellow |
| Strong to severe | >0.3 m2/3 s-1 | Orange, dark orange, red, dark brown, purple |
| Severe (observed example) | >0.5 m2/3 s-1 | Light purple and clear |
Table1: Relationship between CAT descriptions and eddy dissipation rate. Colours refer to ecChart presentation (Fig1)
Further reading
ECMWF Newsletter 168
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Overview
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