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Conceptual Models (CMs): Cold Air Cloudiness (CAC), Enhanced Cumulus (EC ) and Comma

Conceptual Models (CMs): Cold Air Cloudiness (CAC), Enhanced Cumulus (EC ) and Comma. 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.

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Conceptual Models (CMs): Cold Air Cloudiness (CAC), Enhanced Cumulus (EC ) and Comma

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  1. Conceptual Models (CMs):Cold Air Cloudiness (CAC), Enhanced Cumulus (EC)and Comma 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:CAC, EC and Comma(Cold Air Cloudiness and Enhanced Cumulus) • MTP channels in comparison with the corresponding MSG channels • CMs: CAC+EC: IR image + relevant NWP parameters • MSG additional channels + Channel combinations

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

  4. MSG: Ch09 CAC EC Co Sharper contours through improved space resolution

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

  6. MTP: vis CAC EC Co

  7. Looks relatively similar; but: somewhat coarser space resolution MSG: Ch01 CAC EC Co Grey clouds represent transperent clouds

  8. Compared to Ch01: no strong differences in the cloud features over the ocean; but: much better land recognition MSG: Ch02 CAC EC Co Visibility of transperent clouds worse thanin Ch01

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

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

  11. CMs:CAC, EC and Comma(Cold Air Cloudiness and Enhanced Cumulus) • MTP channels in comparison with the corresponding MSG channels • CM CAC+EC: IR image + relevant NWP parameters • MSG additional channels + Channel combinations

  12. H500 CAC, EC and Comma within huge upper level trough

  13. Thickness CAC, EC and Comma within huge thickness trough

  14. Thickness (green) + TA (red) CAC, EC and Comma within huge thickness trough and mainly under CA

  15. Showalter index EC: unstable (Show < 3) Comma: Show > 5; much less unstable

  16. PVA at 500 hPa EC and Comma: both are accompanied by distinct PVA max

  17. Height and PVA at 500 EC and Comma: both PVA max are connected to upper level troughs

  18. Isotachs 300 EC and Comma: both are on cyclonic side of jet streaks but: Comma is in left exit region

  19. Isotachs and PVA 300 EC: no PVA max at 300 Comma: distinct PVA max in left exit region of the jet streak

  20. CMs:CAC, EC and Comma(Cold Air Cloudiness and Enhanced Cumulus) • MTP channels in comparison with the corresponding MSG channels • CM CAC+EC: IR image + relevant NWP parameters • MSG additional channels + Channel combinations

  21. MSG:129 CAC EC Co CAC: yellow: low cloud tops EC: yellow + blue: vertically extended cells Co: blue: mainly cold cloud tops

  22. MSG: Ch03 CAC CAC: white: water cloud EC: white + dark grey: water cloud + ice cloud superimposed Co: dark grey: mainly cold cloud tops EC Co

  23. MSG:321 CAC EC Co Grey shades: from Vis channels Cyan: represents the ice clouds from Ch03

  24. MSG: Ch04 CAC EC Co CAC: grey: warm cloud tops EC and Co: cold cloud tops

  25. MSG:139 CAC EC CAC: yellow: low/warm cloud tops EC: magenta + blue: vertically extended cells Co: blue: mainly cold cloud tops some magenta spots visible Co

  26. MSG:134 CAC EC CAC: yellow: low/warm cloud tops EC: yellow + brown: vertically extended cells Co: brown: mainly cold cloud tops some yellow spots visible Co

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