by ZAMG
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01 October 2001/06.00 UTC - Meteosat IR image; cyan: height contours 500 hPa, magenta: height contours 1000 hPa
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01 October 2001/06.00 UTC - Meteosat IR image; green: height contours 300 hPa, red: positive vorticity advection (PVA)
300 hPa
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01 October 2001/06.00 UTC - Meteosat IR image; blue: shear vorticity 300 hPa, brown: curvature vorticity 300 hPa
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01 October 2001/06.00 UTC - Meteosat IR image; black: zero line of shear vorticity 300 hPa, yellow: isotachs 300 hPa
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01 October 2001/06.00 UTC - Meteosat IR image; magenta: potential vorticity, red: temperature advection 700 hPa
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| Upper Wave | Wave |
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| No separate trough or minimum at surface | Distinct short Wave trough or minimum at surface |
| Sharp pronounced trough at upper levels | Trough at upper levels similar to fronts |
| CA at 700 hPa | Distinct WA maximum at 700 hPa |
| Higher numerical values of curvature vorticity at upper levels (300 hPa) | Higher numerical values of curvature vorticity at lower levels (700 hPa) |
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01 October 2001/06.00 UTC - Meteosat IR image; red: temperature advection 700 hPa, magenta: height contourst 1000 hPa
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19 November 2002/00.00 UTC - Meteosat IR image; red: temperature advection 700 hPa, magenta: height contourst 1000 hPa
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