1 / 40

Comparison of Comma-Type Cloud Structures Using MSG Satellite Imagery

This document presents a conceptual model for analyzing different types of comma clouds through MSG satellite imagery. It compares the channels of MTP with those of MSG, highlighting improvements in spatial resolution and detail. The analysis includes visual and quantitative evaluations of various channel combinations, such as IR and VIS, showing significant differences in cloud features and land recognition capabilities. The findings emphasize the enhanced detail in MSG images, aiding in the understanding of cloud structures and their meteorological implications.

marcos
Télécharger la présentation

Comparison of Comma-Type Cloud Structures Using MSG Satellite Imagery

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related