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Conceptual Model (CM): Comma (different types)

Conceptual Model (CM): Comma (different types). 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. Conceptual Model (CM): Comma (different types).

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Conceptual Model (CM): Comma (different types)

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  1. Conceptual Model (CM):Comma(different types) 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. Conceptual Model (CM):Comma(different types) • MTP channels in comparison with the corresponding MSG channels • CM: commas: IR image + relevant NWP parameters • MSG additional channels + Channel combinations • (WV and WV difference images)

  3. Large Comma with thick cloud

  4. MTP: ir Co As the image time between MTP and MSG differs, a shift between the cloud systems can be noticed in the two images

  5. Sharper contours through improved space resolution MSG: Ch09 Co

  6. Visual inspection shows only very slight changes between Ch09 and Ch10; quantitative evaluation necessary MSG: Ch10 Co

  7. MTP: vis Co

  8. Looks relatively similar; but: somewhat coarser space resolution MSG: Ch01 Co

  9. Compared to Ch01: no strong differences in the cloud features; but: much better land recognition MSG: Ch02 Co

  10. MTP:VIS(2x)+IR Co

  11. Sharper contours and more detailed colour combinations through improved space resolution in IR and additional information from 2 different VIS channels MSG: 129 Co

  12. Small Comma in high cloud

  13. MTP: ir Co

  14. MSG: Ch09 Co Sharper contours through improved space resolution

  15. MSG: Ch10 Co Visual inspection shows only very slight changes between Ch09 and Ch10; quantitative evaluation necessary

  16. MTP: vis Co

  17. Looks relatively similar; but: somewhat coarser space resolution MSG: Ch01 Co Grey cloud represent transparent cloud

  18. Compared to Ch01: no strong differences in the cloud features over the ocean; but: much better land recognition MSG: Ch02 Co transparent cloud less good visible than in Ch01

  19. MTP:VIS(2x)+IR Co Blue: high cloud is very dominant

  20. Sharper contours and more detailed grey-shades through improved space resolution in IR and additional information from 2 different VIS channels MSG:129 Co Dark blue: High cloud light blue: thick cells yellow: less thick cloud cells

  21. Conceptual Model (CM):Comma(different types) • MTP channels in comparison with the corresponding MSG channels • CM: commas: IR image + relevant NWP parameters • MSG additional channels + Channel combinations • (WV and WV difference images)

  22. Comparison of two comma types • Large Comma with thick cloud • Small Comma in high cloud

  23. H500 Comma within huge upper level trough

  24. Comma: PVA max is dramatically shifted to the S (frontal area) model error ? PVA at 500 hPa

  25. H500 Comma within huge upper level trough

  26. PVA at 500 hPa Comma: accompanied by distinct PVA max

  27. Isotachs and PVA 300 Comma: distinct PVA max in left exit region of the jet streak

  28. Conceptual Model (CM):Comma(different types) • MTP channels in comparison with the corresponding MSG channels • CM: commas: IR image + relevant NWP parameters • MSG additional channels + Channel combinations • WV and WV difference images

  29. Comparison of two comma types • Large Comma with thick cloud • Small Comma in high cloud

  30. MSG:129 Co Co: blue/grey/yellow: multilayered; cellular character in structure recognisable

  31. MSG:129 Co Co: blue: mainly cold cloud tops

  32. dark grey: mainly cold cloud tops very few white spots represent cells with water clouds (tops not yet ice) Co

  33. MSG: Ch03 Co dark grey: mainly cold cloud tops some white spots represent cells with water clouds (tops not yet ice)

  34. Co Grey shades: from Vis channels Cyan: represents the ice clouds from Ch03; cyan dominates the Co area; different shades within cyan show different vertical structure of cells

  35. MSG:321 Grey shades: from Vis channels Cyan: represents the ice clouds from Ch03; lots of grey cells visible through the dark cyan of the Co; cells and ice clouds are somewhat decoupled Co

  36. Co Co: cold cloud tops; only very few grey spots (represent warmer cells)

  37. MSG: Ch04 Co Co: cold cloud tops; grey spots represent warmer cells

  38. Co Co: red: low cell tops; water clouds magenta: thick cells with ice cloud blue: cold/ high cloud tops ; ice cloud

  39. MSG:139 Co Co: blue: mainly cold cloud tops some magenta spots visible

  40. MSG:134 Co Co: brown: mainly cold cloud tops some yellow spots visible

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