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APPLICATIONS OF METEOSAT SECOND GENERATION (MSG)

This PowerPoint presentation explores the use of Meteosat Second Generation (MSG) channels for monitoring convection during the day. It includes recommended channels, channel differences, and RGB color composites for monitoring convection.

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APPLICATIONS OF METEOSAT SECOND GENERATION (MSG)

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  1. APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) DAY-TIME CONVECTION Author: Jochen Kerkmann (EUMETSAT) (kerkmann@eumetsat.de) Contributors: D. Rosenfeld (HUJ)

  2. Note: in this Powerpoint presentation (in most cases) the SEVIRI images are not inverted, i.e. displayed as solar channels. If a channel is inverted, this is denoted by the small letter "i".

  3. PART 1: MSG SEVIRI CHANNELSUSEFUL TOMONITOR CONVECTION DAY-TIME

  4. Recommended Channels HRVIS fine-scale structures VIS0.6 optical thickness of clouds NIR1.6 particle size and phase IR3.9 particle size and phase WV6.2 upper-level moisture WV7.3 mid-level moisture, early convection IR10.8 top temperature

  5. HRVIS Fine Scale Structures Cirrus Outflow MSG-1 23 April 2003 17:00 UTC Channel 12 (HRVIS) Overshooting Top Ghana

  6. HRVIS Fine Scale Structures The Channel MSG-1 8 June 2003 13:00 UTC Channel 12 (HRVIS) Cloud Streets

  7. HRVIS Fine Scale Structures Orographic Convection Spain MSG-1 8 June 2003 15:00 UTC Channel 12 (HRVIS) Orographic Convection

  8. HRVIS Fine Scale Structures MSG-1 5 August 2003 16:30 UTC Channel 12 (HRVIS) Spain Spanish Plume

  9. HRVIS Fine Scale Structures Single Cb Shadow MesoscaleConvectiveSystem MSG-1 7 August 2003 16:30 UTC Channel 12 (HRVIS) Lac Leman

  10. Cloud Streets HRVIS Fine Scale Structures MesoscaleConvectiveSystem MSG-1 13 June 2003 12:00 UTC Channel 12 (HRVIS) Coastal Convergence Thin Cirrus Po Valley

  11. HRVIS Fine Scale Structures Cloud Streets MSG-1 13 June 2003 12:00 UTC Channel 12 (HRVIS) Coastal Convergence

  12. Thick Cb Cloud Thin Cirrus Anvil VIS0.6 Optical Thickness MSG-1 5 June 2003 14:45 UTC Channel 01 (VIS0.6)

  13. Large Ice Particles NIR1.6 Particle Size and Phase Small Ice Particles Water Clouds MSG-1 5 June 2003 14:45 UTC Channel 03 (NIR1.6)

  14. Large Ice Particles IR3.9 Particle Size and Phase Small Ice Particles Water Clouds MSG-1 5 June 2003 14:45 UTC Channel 04 (IR3.9)

  15. Dark Stripe WV7.3 Mid-Level Moisture High Mid-Level Moisture MSG-1 5 June 2003 14:45 UTC Channel 06i (WV7.3)

  16. Cold Clouds IR10.8 Top Temperature Warm Clouds MSG-1 5 June 2003 14:45 UTC Channel 09 (IR10.8)

  17. PART 2: CHANNEL DIFFERENCESUSEFUL TOMONITOR CONVECTION DAY-TIME

  18. Recommended Differences NIR1.6 - VIS0.6 optical thickness, phase, particle size IR3.9 - IR10.8 optical thickness, phase, particle size, emissivity IR8.7 - IR10.8 optical thickness IR12.0 - IR10.8 optical thickness WV6.2 - IR10.8 overshooting tops WV6.2 - WV7.3 overshooting tops

  19. MSG-1 5 June 2003 14:45 UTC Difference Image NIR1.6 - VIS0.6

  20. Note: same as previous image, but black/white inverted (i = inverted) MSG-1 5 June 2003 14:45 UTC Difference Image (NIR1.6 - VIS0.6)i

  21. MSG-1 5 June 2003 14:45 UTC Difference Image IR3.9 - IR10.8

  22. MSG-1 5 June 2003 14:45 UTC Difference Image IR8.7 - IR10.8

  23. MSG-1 5 June 2003 14:45 UTC Difference Image IR12.0 - IR10.8

  24. MSG-1 5 June 2003 14:45 UTC Difference Image WV6.2 - IR10.8

  25. MSG-1 5 June 2003 14:45 UTC Difference Image WV6.2 - WV7.3

  26. MSG-1 5 June 2003 14:45 UTC Difference Image WV6.2 - IR10.8

  27. MSG-1 5 June 2003 14:45 UTC Difference Image WV6.2 - WV7.3

  28. PART 3: RECOMMENDED RED-GREEN-BLUE (RGB) COLOUR COMPOSITESFOR MONITORING CONVECTION DAY-TIME

  29. Recommended RGBs Daytime Red: Cloud depth and amount of cloud water and ice, provided by the visible reflectance at 0.6 mm. Green: Cloud particle size and phase, approximated by the 1.6 mm or 3.9 mm solar reflectance component. Blue: Temperature, provided by the 10.8 mm channel.

  30. Recommended RGBs Daytime - HRVIS Red: Cloud optical depth and detailed cloud top structures, provided by the HRVIS channel. Green: Cloud optical depth and detailed cloud top structures, provided by the HRVIS channel. Blue: Temperature, provided by 10.8 mm, or cloud particle size and phase, provided by the NIR1.6 or IR3.9 channel.

  31. Typical Convective Development- Daytime - VIS0.6 NIR1.6 IR3.9 IR10.8 I. Very early stage white white white light grey (low, warm water cloud) opt thick water water warm II. First convection* white white white dark grey (first convective towers) opt thick supercooled supercooled cold waterwater III. First icing white light grey grey black (transformation in Cb) opt thick small icesmall ice very cold IV. Large icing white dark grey black black (Cb anvils) opt thick large icelarge ice very cold *This phase is more frequent in Africa, i.e. it is more easy to find examples for this phase in tropical convection

  32. RGB 01-04-09 Red Green Blue VIS0.6 IR3.9 IR10.8 RGB I. Very early stage 255 255 200 white-light yellow II. First convection 255 255 100 yellow III. First icing 255 150 0 orange IV. Large icing 255 0 0 red

  33. RGB 01-04-09 RGB 0.6 / 3.9 / 10.8 I. Very early stage white-light yellow II. First convection yellow III. First icing orange IV. Large icing red II III I IV

  34. RGB 01-03-09 Red Green Blue VIS0.6 NIR1.6 IR10.8 RGB I. Very early stage 255 255 200 white-light yellow II. First convection 255 255 100 yellow III. First icing 255 200 0 orange IV. Large icing 255 100 0 red-orange

  35. II. First Convection (Supercooled Clouds) Supercooled Water Clouds MSG-1, 5 June 2003, 10:00 UTC, RGB 01-03-09

  36. III. First Icing Cb Icing MSG-1, 5 June 2003, 10:30 UTC, RGB 01-03-09

  37. IV. Large Icing Large Ice Small Ice MSG-1, 5 June 2003, 11:30 UTC, RGB 01-03-09

  38. V. Very Large Icing Large Ice MSG-1, 5 June 2003, 13:30 UTC, RGB 01-03-09

  39. Low red: Dark and thin clouds

  40. Other RGBs: 03-04-09 Red Green Blue NIR1.6 IR3.9 IR10.8 RGB I. Very early stage 255 255 200 white-light yellow II. First convection 255 255 100 yellow III. First icing 200 150 0 brown IV. Large icing 100 0 0 dark brown

  41. Other RGBs: 01-03-04 Red Green Blue VIS0.6 NIR1.6 IR3.9 RGB I. Very early stage 255 255 255 white II. First convection 255 255 255 white III. First icing 255 200 150 khaki-brown IV. Large icing 255 100 0 red-orange

  42. RGBs with the HRVIS Channel - RGB HRV - HRV - IR10.8 (12-12-09) - RGB HRV - HRV - IR3.9 (12-12-04) - RGB HRV - HRV - NIR1.6 (12-12-03)

  43. Channel 12 (HRV) RGB HRV-HRV-IR10.8i MSG-1, 5 June 2003, 14:45 UTC

  44. Channel 12 (HRV) RGB HRV-HRV-IR3.9i MSG-1, 5 June 2003, 14:45 UTC

  45. Channel 12 (HRV) RGB HRV-HRV-NIR1.6 MSG-1, 5 June 2003, 14:45 UTC

  46. Channel 12 (HRV) RGB HRV-HRV-IR10.8i MSG-1, 8 September 2003, 15:00 UTC

  47. Channel 12 (HRV) RGB HRV-HRV-IR3.9i MSG-1, 8 September 2003, 15:00 UTC

  48. Channel 12 (HRV) RGB HRV-HRV-NIR1.6 MSG-1, 8 September 2003, 15:00 UTC

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