Version 1.0, 20 April 2005 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB IMAGES: PART 04 RGB COMPOSITES WITH CHANNELS 01-11 AND THEIR INTERPRETATION.

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Presentation transcript:

Version 1.0, 20 April 2005 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB IMAGES: PART 04 RGB COMPOSITES WITH CHANNELS AND THEIR INTERPRETATION Author:Jochen Kerkmann (EUMETSAT) Contributors:D. Rosenfeld (HUJ), G. Bridge (EUM)

Version 1.0, 20 April 2005 Slide: 2 PART 4: RED-GREEN-BLUE COLOUR COMPOSITES WITH CHANNELS AND THEIR INTERPRETATION

Version 1.0, 20 April 2005 Slide: 3 Recommended Schemes for RGB Image Composites RGB CompositeApplicationsTime RGB 03,02,01:Vegetation, Snow, Smoke, Dust, FogDay RGB 02,04r,09:Clouds, Convection, Snow, Fog, FiresDay RGB 02,03,04r:Snow, FogDay RGB 05-06,04-09,03-01:Severe ConvectionDay RGB 10-09,09-04,09:Clouds, Fog, ContrailsNight RGB 10-09,09-07,09:Dust, Thin Clouds, ContrailsDay & Night RGB 05-06,08-09,05Severe Cyclones, Jets, PV AnalysisDay & Night

Version 1.0, 20 April 2005 Slide: 4 R = Channel 03 (NIR1.6) G = Channel 02 (VIS0.8) B = Channel 01 (VIS0.6) 1. RGB 03, 02, 01 ("Day Natural Colours") Applications: Applications:Vegetation, Dust, Smoke, Fog, Snow Area: Area:Full MSG Viewing Area Time: Time:Day-Time

Version 1.0, 20 April 2005 Slide: 5 Recommended Range and Enhancement: BeamChannelRangeGammaGamma2 Red03 (NIR1.6)0 …+100 % Green02 (VIS0.8) % Blue01 (VIS0.6) % RGB 03, 02, 01 ("Day Natural Colours")

Version 1.0, 20 April 2005 Slide: 6 Ch.03 NIR1.6 Ch.02 VIS0.8 Ch.01 VIS0.6

Version 1.0, 20 April 2005 Slide: 7 RGB 03, 02, 01 Example: Snow NIR1.6 VIS0.8 VIS0.6 In RGB 03,02,01 images, snow appears in cyan colour ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 8 MSG-1, 18 February 2003, 13:00 UTC RGB 03, 02, 01 Example: Snow

Version 1.0, 20 April 2005 Slide: 9 RGB 03, 02, 01 Example: Vegetation NIR1.6 VIS0.8 VIS0.6 In RGB 03,02,01 images, vegetation appears in greenish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 10 MSG-1, 23 June 2003, 15:00 UTC RGB 03, 02, 01 Example: Vegetation

Version 1.0, 20 April 2005 Slide: 11 NIR1.6 VIS0.8 VIS0.6 RGB 03, 02, 01 Example: Desert In RGB 03,02,01 images, deserts appear in reddish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 12 MSG-1, 3 February 2004, 11:30 UTC RGB 03, 02, 01 Example: Desert

Version 1.0, 20 April 2005 Slide: 13 RGB 03, 02, 01 Example: Low-level Water Clouds (St, Sc) NIR1.6 VIS0.8 VIS0.6 In RGB 03,02,01 images, low water clouds with small droplets appear in whitish-pinkish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 14 MSG-1, 03 February 2004, 11:30 UTC RGB 03, 02, 01 Example: Low-level Water Clouds (St, Sc)

Version 1.0, 20 April 2005 Slide: 15 MSG-1 19 April :00 UTC RGB 03, 02, 01 Global View

Version 1.0, 20 April 2005 Slide: 16 RGB 03, 02, 01: Interpretation of Colours Ocean Veg. Land Desert Snow High-level ice clouds Low-level water clouds

Version 1.0, 20 April 2005 Slide: 17 R = Channel 02 (VIS0.8) G = Channel 04r (IR3.9, solar component) B = Channel 09 (IR10.8) 2. RGB 02, 04r, 09 ("Day Microphysical") Applications: Applications:Cloud Analysis, Convection, Fog, Snow, Fires Area: Area:Full MSG Viewing Area Time: Time:Day-Time

Version 1.0, 20 April 2005 Slide: RGB 02, 04r, 09 ("Day Microphysical") Recommended Range and Enhancement (Summer): BeamChannelRangeGammaGamma2 Red02 (VIS0.8)0 …+100 % Green04r (IR3.9r) % Blue09 (IR10.8) K1.01.0

Version 1.0, 20 April 2005 Slide: RGB 02, 04r, 09 ("Day Microphysical") Recommended Range and Enhancement (Winter): BeamChannelRangeGammaGamma2 Red02 (VIS0.8)0 …+100 % Green04r (IR3.9r) % Blue09 (IR10.8) K1.01.0

Version 1.0, 20 April 2005 Slide: 20 Ch.02 VIS0.8 Ch.04r IR3.9r Ch.09 IR10.8 MSG-1, 8 September 2003, 12:00 UTC RGB Composite 02, 04r, 09 "winter" enhancement (see previous slide)

Version 1.0, 20 April 2005 Slide: 21 RGB 02, 04r, 09 Example: Severe Convection VIS0.8 IR3.9r IR10.8 In RGB 02,04r,09 images, cold Cb clouds with small ice particles appear in light orange colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 22 RGB 02, 04r, 09 Example: Severe Convection MSG-1, 20 May 2003, 13:30 UTC ("winter" enhancement)

Version 1.0, 20 April 2005 Slide: 23 RGB 02, 04r, 09 Example: Ship Trails VIS0.8 IR3.9r IR10.8 In RGB 02,04r,09 images, ship trails (small droplets) appear in whitish - light bluish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 24 RGB 02, 04r, 09 Example: Ship Trails MSG-1, 7 September 2003, 11:45 UTC ("winter" enhancement)

Version 1.0, 20 April 2005 Slide: 25 RGB 02, 04r, 09 Example: Fires VIS0.8 IR3.9r IR10.8 In RGB 02,04r,09 images, forest fires appear in cyan colour ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 26 RGB 02, 04r, 09 Example: Fires MSG-1, 7 September 2003, 11:45 UTC ("winter" enhancement)

Version 1.0, 20 April 2005 Slide: 27 Red: Cloud depth and amount of cloud water and ice, provided by the visible reflectance at 0.8  m. Green:Cloud particle size and phase, approximated by the 3.9  m solar reflectance component. Blue:Temperature, provided by the 10.8  m channel. RGB 02, 04r, 09: Physical Interpretation for Clouds

Version 1.0, 20 April 2005 Slide: 28 RGB 02, 04r, 09: Interpretation of Colours for High-level Clouds Deep precipitating cloud (precip. not necessarily reaching the ground) - bright, thick - large ice particles - cold cloud Deep precipitating cloud (Cb cloud with strong updrafts and severe weather)* - bright, thick - small ice particles - cold cloud *or thick, high-level lee cloudiness with small ice particles Thin Cirrus cloud (large ice particles) Thin Cirrus cloud (small ice particles) Ocean Veg. Land Fires / Desert Snow

Version 1.0, 20 April 2005 Slide: 29 RGB 02, 04r, 09: Interpretation of Colours for Mid-level Clouds Supercooled, thick water cloud - bright, thick - large droplets Supercooled, thick water cloud - bright, thick - small droplets Supercooled thin water cloud with large droplets Supercooled, thin water cloud with small droplets * * or, in rare occasions, thin Ci cloud with small ice particles Ocean Veg. Land Fires / Desert Snow

Version 1.0, 20 April 2005 Slide: 30 RGB 02, 04r, 09: Interpretation of Colours for Low-level Clouds Thick water cloud (warm rain cloud) - bright, thick - large droplets Thick water cloud (no precipitation) - bright, thick - small droplets Thin water cloud with large droplets Thin water cloud with small droplets Ocean Veg. Land Fires / Desert Snow

Version 1.0, 20 April 2005 Slide: 31 R = Channel 02 (VIS0.8) G = Channel 03 (NIR1.6) B = Channel 04r (IR3.9r, solar component) 3. RGB 02, 03, 04r ("Day Solar") Applications: Applications:Fog/Low Clouds, Snow Area: Area:Mid-High Latitudes Time: Time:Day-Time in Winter

Version 1.0, 20 April 2005 Slide: RGB 02, 03, 04r ("Day Solar") Recommended Range and Enhancement: BeamChannelRangeGammaGamma2 Red02 (VIS0.8)0 …+100 % Green03 (NIR1.6) % Blue04r (IR3.9r)0 … +30 %1.71.0

Version 1.0, 20 April 2005 Slide: 33 Ch.02 VIS0.8 Ch.03 NIR1.6 Ch.04r IR3.9r MSG-1, 24 February 2003, 11:00 UTC RGB Composite 02, 03, 04r

Version 1.0, 20 April 2005 Slide: 34 RGB 02, 03, 04r Example: Snow VIS0.8 NIR1.6 IR3.9r In RGB 02,03,04r images, snow appears in reddish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 35 RGB 02, 03, 04r Example: Snow MSG-1, 26 January 2004, 10:00 UTC

Version 1.0, 20 April 2005 Slide: 36 RGB 02, 03, 04r Example: Low Clouds VIS0.8 NIR1.6 IR3.9r In RGB 02,03,04r images, low-level clouds appear in whitish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 37 RGB 02, 03, 04r Example: Low Clouds MSG-1, 26 January 2004, 10:00 UTC

Version 1.0, 20 April 2005 Slide: 38 RGB 02, 03, 04r: Interpretation of Colours for Thick Ice and Water Clouds Deep precipitating cloud (precip. not necessarily reaching the ground) - bright, thick - large ice particles Ocean Veg. Land Desert Snow Deep precipitating cloud* - bright, thick - small ice particles *or thick, high-level lee cloudiness with small ice particles Thick water cloud with large droplets Thick water cloud with small droplets

Version 1.0, 20 April 2005 Slide: 39 R = Difference WV6.2 - WV7.3 G = Difference IR3.9 - IR10.8 B = Difference NIR1.6 - VIS RGB 05-06, 04-09, ("Convective Storms") Applications: Applications:Severe Convective Storms Area: Area:Full MSG Viewing Area Time: Time:Day-Time

Version 1.0, 20 April 2005 Slide: RGB 05-06, 04-09, ("Convective Storms") Recommended Range and Enhancement: BeamChannelRangeGammaGamma2 RedWV6.2 - WV … GreenIR3.9 - IR … BlueNIR1.6 - VIS …

Version 1.0, 20 April 2005 Slide: 41 Ch.05 -Ch.06 Ch.04 -Ch.09 Ch.03 -Ch.01 MSG-1, 8 September 2003, 12:00 UTC RGB Composite 05-06, 04-09, 03-01

Version 1.0, 20 April 2005 Slide: 42 RGB 05-06, 04-09, Example: Severe Convection In RGB 05-06,04-09,03-01 images, cold Cb tops with small ice particles appear in yellowish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 43 RGB 05-06, 04-09, Example: Severe Convection MSG-1, 20 May 2003, 13:30 UTC RGB 02,04r,09 RGB 05-06,04-09,03-01 (for comparison) better identification of young, severe storms

Version 1.0, 20 April 2005 Slide: 44 RGB 05-06, 04-09, Example: Convection In RGB 05-06,04-09,03-01 images, cold Cbs with large ice particles appear in reddish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 45 RGB 05-06, 04-09, Example: Convection MSG-1, 20 May 2003, 13:30 UTC RGB 02,04r,09 RGB 05-06,04-09,03-01 (for comparison) better identification of young, severe storms

Version 1.0, 20 April 2005 Slide: 46 RGB 05-06, 04-09, Example: Severe Convection MSG-1, 13 June 2003, 12:00 UTC RGB 02,04r,09 RGB 05-06,04-09,03-01 (for comparison) better identification of young, severe storms

Version 1.0, 20 April 2005 Slide: 47 RGB 05-06, 04-09, Example: Severe Convection MSG-1, 3 February 2004, 11:30 UTC RGB 02,04r,09 RGB 05-06,04-09,03-01 (for comparison) better identification of young, severe storms

Version 1.0, 20 April 2005 Slide: 48 RGB 05-06, 04-09, Global View MSG-1 5 September :00 UTC

Version 1.0, 20 April 2005 Slide: 49 RGB 05-06, 04-09, 03-01: Interpretation of Colours Deep precipitating cloud (precip. not necessarily reaching the ground) - high-level cloud - large ice particles Ocean Land Thin Cirrus cloud (large ice particles) Thin Cirrus cloud (small ice particles) Deep precipitating cloud (Cb cloud with strong updrafts and severe weather)* - high-level cloud - small ice particles *or thick, high-level lee cloudiness with small ice particles

Version 1.0, 20 April 2005 Slide: 50 R = Difference IR IR10.8 G = Difference IR IR3.9 B = Channel IR RGB 10-09, 09-04, 09 ("Night Microphysical") Applications: Applications:Cloud Analysis, Fog, Contrails Area: Area:Full MSG Viewing Area Time: Time:Night-Time

Version 1.0, 20 April 2005 Slide: RGB 10-09, 09-04, 09 ("Night Microphysical") Recommended Range and Enhancement: BeamChannelRangeGammaGamma2 RedIR IR … GreenIR IR3.90 … BlueIR …

Version 1.0, 20 April 2005 Slide: 52 Ch.10 -Ch.09 Ch.09 -Ch.04 Ch.09 MSG-1, 9 November 2003, 02:45 UTC RGB Composite 10-09, 09-04, 09

Version 1.0, 20 April 2005 Slide: 53 RGB 10-09, 09-04, 09 Example: Fog In RGB 10-09,09-04,09 images, night-time fog appears in light greenish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 54 RGB 10-09, 09-04, 09 Example: Fog MSG-1, 14 March 2005, 00:00 UTC

Version 1.0, 20 April 2005 Slide: 55 RGB 10-09, 09-04, 09 Example: Cb In RGB 10-09,09-04,09 images, thick Cb clouds at night appear in sprenkled yellow-red colour (noise in channel 04)! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 56 RGB 10-09, 09-04, 09 Example: Cb MSG-1, 19 April 2005, 03:15 UTC

Version 1.0, 20 April 2005 Slide: 57 RGB 10-09, 09-04, 09 Example: Cirrus In RGB 10-09,09-04,09 images, thin Cirrus clouds appear in dark bluish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 58 RGB 10-09, 09-04, 09 Example: Cirrus MSG-1, 18 March 2005, 00:00 UTC

Version 1.0, 20 April 2005 Slide: 59 RGB 10-09, 09-04, 09 Global View MSG-1 3 February :00 UTC

Version 1.0, 20 April 2005 Slide: 60 RGB 10-09, 09-04, 09: Interpretation of Colours for High-level Clouds Cold, thick, high-level cloudVery cold (< -50°C), thick, high-level cloud Thin Cirrus cloud Ocean Land

Version 1.0, 20 April 2005 Slide: 61 RGB 10-09, 09-04, 09: Interpretation of Colours for Mid/Low-level Clouds Thick, mid-level cloudThin, mid-level cloud Ocean Land Low-level cloud (cold atmosphere, Europe) Low-level cloud (warm atmosphere, Africa)

Version 1.0, 20 April 2005 Slide: 62 R = Difference IR IR10.8 G = Difference IR IR8.7 B = Channel IR RGB 10-09, 09-07, 09 ("Dust") Applications: Applications:Dust, Thin Clouds, Contrails Area: Area:Full MSG Viewing Area Time: Time:Day and Night

Version 1.0, 20 April 2005 Slide: RGB 10-09, 09-07, 09 ("Dust") Recommended Range and Enhancement: BeamChannelRangeGammaGamma2 RedIR IR … GreenIR IR8.70 … BlueIR …

Version 1.0, 20 April 2005 Slide: 64 Ch.10 -Ch.09 Ch.09 -Ch.07 Ch.09 MSG-1, 3 March 2004, 01:00 UTC RGB Composite 10-09, 09-07, 09

Version 1.0, 20 April 2005 Slide: 65 RGB 10-09, 09-04, 09 Example: Dust In RGB 10-09,09-07,09 images, dust appears in magenta colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 66 RGB 10-09, 09-07, 09 Example: Dust MSG-1, 3 March 2004, 10:00 UTC

Version 1.0, 20 April 2005 Slide: 67 RGB 10-09, 09-07, 09 Example: Dust MSG-1, 25 June 2003, 10:00 UTC

Version 1.0, 20 April 2005 Slide: 68 RGB 10-09, 09-07, 09 Global View MSG-1 22 January :00 UTC

Version 1.0, 20 April 2005 Slide: 69 RGB 10-09, 09-07, 09: Interpretation of Colours for High-level Clouds Cold, thick, high-level cloudsThin Cirrus clouds Contrails Ocean Warm Desert Cold Desert Warm Land Cold Land

Version 1.0, 20 April 2005 Slide: 70 RGB 10-09, 09-07, 09: Interpretation of Colours for Low/Mid-level Clouds Ocean Warm Desert Cold Desert Warm Land Cold Land Thick, mid-level cloud Thin, mid-level cloud Low-level cloud (cold atmosphere, Europe) Low-level cloud (warm atmosphere, Africa) Dust Storm

Version 1.0, 20 April 2005 Slide: 71 R = Difference WV6.2 - WV7.3 G = Difference IR9.7 - IR10.8 B = Channel WV6.2i 7. RGB 05-06, 08-09, 05i ("Airmass") Applications: Applications:Rapid Cyclogenesis, Jet Stream Analysis, PV Analysis Area: Area:Full MSG Viewing Area Time: Time:Day and Night

Version 1.0, 20 April 2005 Slide: 72 Recommended Range and Enhancement: BeamChannelRangeGammaGamma2 RedWV6.2 - WV … GreenIR9.7 - IR … BlueWV … RGB 05-06, 08-09, 05i ("Airmass")

Version 1.0, 20 April 2005 Slide: 73 Ch.05 -Ch.06 Ch.08 -Ch.09 Ch.05i MSG-1, 7 January 2005, 03:00 UTC RGB Composite 05-06, 08-09, 05i

Version 1.0, 20 April 2005 Slide: 74 RGB 05-06, 08-09, 05i Example: Advection Jet i In RGB 05-06,08-09,05i images, dry descending stratospheric air related to an advection jet appears in reddish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 75 RGB 05-06, 08-09, 05i Example: Advection Jet MSG-1, 7 January 2005, 22:00 UTC

Version 1.0, 20 April 2005 Slide: 76 RGB 05-06, 08-09, 05i Example: Warm Airmass i In RGB 05-06,08-09,05i images, warm airmasses with high tropopause appear in greenish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 77 RGB 05-06, 08-09, 05i Example: Warm Airmass MSG-1, 7 January 2005, 22:00 UTC

Version 1.0, 20 April 2005 Slide: 78 RGB 05-06, 08-09, 05i Example: Cold Airmass i In RGB 05-06,08-09,05i images, cold airmasses with low tropopause appear in bluish colours ! The values shown above (in the red box) correspond to the location (shown by an arrow) on the next slide !

Version 1.0, 20 April 2005 Slide: 79 RGB 05-06, 08-09, 05i Example: Cold Airmass MSG-1, 7 January 2005, 22:00 UTC

Version 1.0, 20 April 2005 Slide: 80 RGB 05-06, 08-09, 05i Global View MSG-1 19 April :00 UTC Note: warm airmasses seen at a high satellite viewing angle appear with a bluish colour (limb cooling effect) !

Version 1.0, 20 April 2005 Slide: 81 RGB 05-06, 08-09, 05i: Interpretation of Colours Thick, high-level clouds Thick, mid-level clouds Thick, low-level clouds (warm airmass) Thick, low-level clouds (cold airmass) Jet (high PV) Cold Airmass Warm Airmass Warm Airmass High UTH Low UTH