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Conceptual Models (CMs): Stau (Alps) Lee waves Snow

This study compares MTP and MSG channels to analyze cloud systems in the Alps, highlighting improved resolution and vegetation recognition.

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Conceptual Models (CMs): Stau (Alps) Lee waves Snow

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  1. Conceptual Models (CMs): Stau (Alps)Lee wavesSnow How to use MSG satellite images similarities to and improvements over MTP Contact person: Veronika Zwatz-Meise zwatz-meise@zamg.ac.at Version 1.0. 13 July 2004

  2. CMs:Stau (Alps) Lee wavesSnow • MTP channels in comparison with the corresponding MSG channels • CM Stau: IR image + relevant NWP parameters • MSG additional channels + Channel combinations

  3. MTP: VIS Stau Lee waves Snow As the image time between MTP and MSG differs, a shift between the cloud systems can be noticed in the two images

  4. Looks relatively similar; but: somewhat coarser space resolution best seen at lee waves MSG: CH01 Stau Lee waves Snow

  5. Looks relatively similar; but: somewhat coarse space resolution best seen at lee waves ; much better recognition of vegetation as in Ch01 MSG: CH02 Stau Lee waves Snow

  6. MTP: IR Stau Lee waves Snow

  7. Sharper contours through improved space resolution; especially well seen at lee waves; lee waves are better discernable in IR; relative high, cold cloud tops ? MSG: CH09 Stau Lee waves Snow

  8. MTP: IR+VIS Stau Lee waves Snow

  9. Sharper contours and more detailed grey-shades through improved space resolution in IR and additional information from 2 different VIS channels; less resolution for lee waves from the VIS channels MSG: 129 Stau Lee waves Snow

  10. MTP: WV Drying by sinking air at lee side

  11. MSG: CH05 Drying by sinking air at lee side; no (nearly no) lee cloud visible; no radiation from farther below

  12. In CH06 are lee waves visible: radiation from lower levels reach the satellite MSG: CH06 Lee waves

  13. CMs:Stau Lee wavesSnow • MTP channels in comparison with the corresponding MSG channels • CM Stau: IR image + relevant NWP parameters • MSG additional channels + Channel combinations

  14. Surface high pressure approaches the Alps from SW;Stau as well as lee waves appear in N stream Stau Lee waves Snow

  15. Upper level trough; Stau as well as lee waves appear in NW stream Stau Lee waves Snow

  16. Stau within W stream at 850; lee within NW stream at 850 Wind vectors at 850 hpa Stau Lee waves Snow

  17. Stau within NW stream at 700; lee within NW stream at 700; wind turns to more NW directions Wind vectors at 700 hpa Stau Lee waves Snow

  18. Stau within NW stream at 500; lee within NW stream at 500; wind speed is strong in all three levels Wind vectors at 500 hpa Stau Lee waves Snow

  19. Thickness + TFP Stau and lee waves within thickness trough Stau Lee waves Snow

  20. CM:StauLee wavesSnow • MTP channels in comparison with the corresponding MSG channels • CM Stau: IR image + relevant NWP parameters • MSG additional channels + Channel combinations

  21. Stau cloud, lee waves and snow are white; lee waves are partly only grey (thin) CH01 Stau Lee waves Snow

  22. Stau cloud, lee waves and snow are white; lee waves are partly only grey (thin); vegetation structure and lakes clearly visible CH02 Stau Lee waves Snow

  23. Stau cloud and lee waves are white to light grey; snow is darkgrey to black; lakes are black CH03 Stau Lee waves Snow

  24. Interesting is black snow structure; sharp edge for Stau cloud at Alps; black area to the S cold cloud and/or (?) snow CH04 Stau Lee waves Snow

  25. Interesting is snow structure; brown at W-Alps where there is snow and small stripe S of Alps in Austria; are both snow ? sharp edge for Stau cloud at Alps much better visible as from single channels; RGB134 Stau Lee waves Snow

  26. Interesting is snow structure; pink at W-Alps where there is snow; small stripe S of Alps in Austria has other colour seems to be high cloud; sharp edge for Stau cloud at Alps much better visible as from single channels; RGB139 Stau Lee waves Snow

  27. Interesting is snow structure; pink at W-Alps where there is snow; small stripe S of Alps in Austria has other colour seems to be high cloud; sharp edge for Stau cloud at Alps much better visible as from single channels; RGB149 Stau Lee waves Snow

  28. Cyan appears at the snow and typically superimposed in the small stripe S of the Alps in Austria; Represents Ice cloud and snow RGB321 Stau Lee waves Snow

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