Version 1.0, 20 April 2005 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB IMAGES:...

Version 1.0, 20 April 2005 Slide: 1

APPLICATIONS OFMETEOSAT SECOND GENERATION (MSG)RGB IMAGES: PART 04

RGB COMPOSITES WITH CHANNELS01-11 AND THEIR INTERPRETATION

Author:Author: Jochen Kerkmann (EUMETSAT)Jochen Kerkmann (EUMETSAT)[email protected]@eumetsat.int

Contributors:Contributors: D. Rosenfeld (HUJ), G. Bridge (EUM)D. Rosenfeld (HUJ), G. Bridge (EUM)


PART 4:

RED-GREEN-BLUE COLOUR COMPOSITES WITH

CHANNELS 01 - 11AND THEIR INTERPRETATION


Recommended Schemes forRGB Image Composites

RGB CompositeRGB Composite ApplicationsApplications TimeTime

RGB 03,02,01: Vegetation, Snow, Smoke, Dust, Fog DayRGB 02,04r,09: Clouds, Convection, Snow, Fog, Fires DayRGB 02,03,04r: Snow, Fog DayRGB 05-06,04-09,03-01: Severe Convection Day

RGB 10-09,09-04,09: Clouds, Fog, Contrails Night

RGB 10-09,09-07,09: Dust, Thin Clouds, Contrails Day & NightRGB 05-06,08-09,05 Severe Cyclones, Jets, PV Analysis Day & Night

1.2.3.4.

5.

6.7.


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, SnowArea:Area: Full MSG Viewing AreaTime:Time: Day-Time


Recommended Range and Enhancement:Recommended Range and Enhancement:

Beam Channel Range Gamma Gamma2

Red 03 (NIR1.6) 0 …+100 % 1.0 1.0Green 02 (VIS0.8) 0 ... +100 % 1.0 1.0Blue 01 (VIS0.6) 0 ... +100 % 1.0 1.0

1. RGB 03, 02, 01("Day Natural Colours")


Ch.03NIR1.6

Ch.02VIS0.8

Ch.01VIS0.6


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 tothe location (shown by an arrow) on the next slide !


MSG-1, 18 February 2003, 13:00 UTC

RGB 03, 02, 01 Example: Snow


RGB 03, 02, 01 Example: Vegetation

NIR1.6

VIS0.8

VIS0.6

In RGB 03,02,01 images, vegetation appears in greenish colours !



MSG-1, 23 June 2003, 15:00 UTC

RGB 03, 02, 01 Example: Vegetation


NIR1.6

VIS0.8

VIS0.6

RGB 03, 02, 01 Example: Desert

In RGB 03,02,01 images, deserts appear in reddish colours !




RGB 03, 02, 01 Example: Desert


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 !




RGB 03, 02, 01 Example:Low-level Water Clouds (St, Sc)


MSG-119 April 200512:00 UTC

RGB03, 02, 01

Global View


RGB 03, 02, 01:Interpretation of Colours

Ocean Veg. Land Desert Snow

High-level ice clouds

Low-level water clouds


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, FiresArea:Area: Full MSG Viewing AreaTime:Time: Day-Time



Recommended Range and Enhancement Recommended Range and Enhancement ((SummerSummer):):


Red 02 (VIS0.8) 0 …+100 % 1.0 1.0Green 04r (IR3.9r) 0 ... +60 % 2.5 1.0Blue 09 (IR10.8) +203 ... +323 K 1.0 1.0



Recommended Range and Enhancement (Recommended Range and Enhancement (WinterWinter):):


Red 02 (VIS0.8) 0 …+100 % 1.0 1.0Green 04r (IR3.9r) 0 ... +25 % 1.5 1.0Blue 09 (IR10.8) +203 ... +323 K 1.0 1.0


Ch.02VIS0.8

Ch.04rIR3.9r

Ch.09IR10.8

MSG-1, 8 September 2003, 12:00 UTCRGB Composite 02, 04r, 09

"winter" enhancement(see previous slide)


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 !



RGB 02, 04r, 09 Example:Severe Convection

MSG-1, 20 May 2003, 13:30 UTC ("winter" enhancement)


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 !



RGB 02, 04r, 09 Example: Ship Trails

MSG-1, 7 September 2003, 11:45 UTC ("winter" enhancement)


RGB 02, 04r, 09 Example: Fires

VIS0.8

IR3.9r

IR10.8

In RGB 02,04r,09 images, forest fires appear in cyan colour !



RGB 02, 04r, 09 Example: Fires

MSG-1, 7 September 2003, 11:45 UTC ("winter" enhancement)


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


RGB 02, 04r, 09: Interpretation of Coloursfor 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 strongupdrafts and severeweather)*

- 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


RGB 02, 04r, 09: Interpretation of Coloursfor Mid-level Clouds

Supercooled, thickwater cloud

- bright, thick- large droplets

Supercooled, thickwater cloud

- bright, thick- small droplets

Supercooled thin watercloud with large droplets

Supercooled, thin watercloud with small droplets *

* or, in rare occasions,thin Ci cloud with smallice particles



RGB 02, 04r, 09: Interpretation of Coloursfor 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 withlarge droplets

Thin water cloudwith small droplets



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, SnowArea:Area: Mid-High LatitudesTime:Time: Day-Time in Winter


3. RGB 02, 03, 04r("Day Solar")



Red 02 (VIS0.8) 0 …+100 % 1.7 1.0Green 03 (NIR1.6) 0 ... +70 % 1.71.0Blue 04r (IR3.9r) 0 … +30 % 1.7 1.0


Ch.02VIS0.8

Ch.03NIR1.6

Ch.04rIR3.9r

MSG-1, 24 February 2003, 11:00 UTCRGB Composite 02, 03, 04r


RGB 02, 03, 04r Example: Snow

VIS0.8

NIR1.6

IR3.9r

In RGB 02,03,04r images, snow appears in reddish colours !



RGB 02, 03, 04r Example: Snow

MSG-1, 26 January 2004, 10:00 UTC


RGB 02, 03, 04r Example: Low Clouds

VIS0.8

NIR1.6

IR3.9r

In RGB 02,03,04r images, low-level cloudsappear in whitish colours !



RGB 02, 03, 04r Example: Low Clouds

MSG-1, 26 January 2004, 10:00 UTC


RGB 02, 03, 04r: Interpretation of Coloursfor Thick Ice and Water Clouds


- 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 dropletsThick water cloudwith small droplets


R = Difference WV6.2 - WV7.3G = Difference IR3.9 - IR10.8B = Difference NIR1.6 - VIS0.6

4. RGB 05-06, 04-09, 03-01("Convective Storms")

Applications:Applications: Severe Convective StormsArea:Area: Full MSG Viewing AreaTime:Time: Day-Time


4. RGB 05-06, 04-09, 03-01("Convective Storms")



Red WV6.2 - WV7.3 -35 … +5 1.0 1.0Green IR3.9 - IR10.8 -5 … +60 0.5 1.0Blue NIR1.6 - VIS0.6 -75 … +25 1.0 1.0


Ch.05-Ch.06

Ch.04-Ch.09

Ch.03-Ch.01

MSG-1, 8 September 2003, 12:00 UTCRGB Composite 05-06, 04-09, 03-01


RGB 05-06, 04-09, 03-01 Example:Severe Convection

05 - 06

04 - 09

03 - 01

In RGB 05-06,04-09,03-01 images, cold Cb tops with small ice particles appear in yellowish colours !




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


RGB 05-06, 04-09, 03-01 Example:Convection

05 - 06

04 - 09

03 - 01

In RGB 05-06,04-09,03-01 images, cold Cbs with large ice particles appear in reddish colours !



RGB 05-06, 04-09, 03-01 Example:Convection

MSG-1, 20 May 2003, 13:30 UTC




MSG-1, 13 June 2003, 12:00 UTC



RGB05-06, 04-09, 03-01

Global View

MSG-15 September 200415:00 UTC


RGB 05-06, 04-09, 03-01:Interpretation of Colours


- 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 strongupdrafts and severeweather)*

- high-level cloud- small ice particles

*or thick, high-level lee cloudiness with small ice particles


R = Difference IR12.0 - IR10.8G = Difference IR10.8 - IR3.9B = Channel IR10.8

5. RGB 10-09, 09-04, 09("Night Microphysical")

Applications:Applications: Cloud Analysis, Fog, ContrailsArea:Area: Full MSG Viewing AreaTime:Time: Night-Time


5. RGB 10-09, 09-04, 09("Night Microphysical")



Red IR12.0 - IR10.8-4 … +2 1.0 1.0Green IR10.8 - IR3.9 0 … +10 1.0 1.0Blue IR10.8 +243 … +293 1.0 1.0


Ch.10-Ch.09

Ch.09-Ch.04

Ch.09MSG-1, 9 November 2003, 02:45 UTC

RGB Composite 10-09, 09-04, 09


RGB 10-09, 09-04, 09 Example: Fog

10 - 09

09 - 04

09

In RGB 10-09,09-04,09 images, night-time fogappears in light greenish colours !



RGB 10-09, 09-04, 09 Example: Fog

MSG-1, 14 March 2005, 00:00 UTC


RGB 10-09, 09-04, 09 Example: Cb

10 - 09

09 - 04

09

In RGB 10-09,09-04,09 images, thick Cb clouds at night appear in sprenkled yellow-red colour (noise in channel 04)!



RGB 10-09, 09-04, 09 Example: Cb

MSG-1, 19 April 2005, 03:15 UTC


RGB 10-09, 09-04, 09 Example: Cirrus

10 - 09

09 - 04

09

In RGB 10-09,09-04,09 images, thin Cirrus cloudsappear in dark bluish colours !



RGB 10-09, 09-04, 09 Example: Cirrus

MSG-1, 18 March 2005, 00:00 UTC


RGB10-09, 09-04, 09

Global View

MSG-13 February 200403:00 UTC


RGB 10-09, 09-04, 09: Interpretationof Colours for High-level Clouds

Cold, thick, high-level cloud Very cold (< -50°C), thick,high-level cloud

Thin Cirrus cloud

Ocean Land


RGB 10-09, 09-04, 09: Interpretationof Colours for Mid/Low-level Clouds

Thick, mid-level cloud Thin, mid-level cloud

Ocean Land

Low-level cloud(cold atmosphere, Europe)

Low-level cloud(warm atmosphere, Africa)


R = Difference IR12.0 - IR10.8G = Difference IR10.8 - IR8.7B = Channel IR10.8

6. RGB 10-09, 09-07, 09("Dust")

Applications:Applications: Dust, Thin Clouds, ContrailsArea:Area: Full MSG Viewing AreaTime:Time: Day and Night


6. RGB 10-09, 09-07, 09("Dust")



Red IR12.0 - IR10.8-4 … +2 1.0 1.0Green IR10.8 - IR8.7 0 … +15 2.5 1.0Blue IR10.8 +261 … +289 1.0 1.0


Ch.10-Ch.09

Ch.09-Ch.07

Ch.09

MSG-1, 3 March 2004, 01:00 UTCRGB Composite 10-09, 09-07, 09


RGB 10-09, 09-04, 09 Example: Dust

10 - 09

09 - 07

09

In RGB 10-09,09-07,09 images, dust appears in magenta colours !




MSG-1, 3 March 2004, 10:00 UTC



MSG-1, 25 June 2003, 10:00 UTC


RGB 10-09, 09-07, 09

Global View

MSG-122 January 200412:00 UTC


RGB 10-09, 09-07, 09: Interpretationof Colours for High-level Clouds

Cold, thick, high-level clouds Thin Cirrus cloudsContrails

Ocean Warm Desert Cold Desert Warm Land Cold Land


RGB 10-09, 09-07, 09: Interpretationof 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


R = Difference WV6.2 - WV7.3G = Difference IR9.7 - IR10.8B = Channel WV6.2i

7. RGB 05-06, 08-09, 05i("Airmass")

Applications:Applications: Rapid Cyclogenesis, Jet Stream Analysis, PV AnalysisArea:Area: Full MSG Viewing AreaTime:Time: Day and Night




Red WV6.2 - WV7.3 -25 … 0 1.0 1.0Green IR9.7 - IR10.8 -40 … +5 1.0 1.0Blue WV6.2 +243 … +208 1.0 1.0

7. RGB 05-06, 08-09, 05i("Airmass")


Ch.05-Ch.06

Ch.08-Ch.09

Ch.05i

MSG-1, 7 January 2005, 03:00 UTCRGB Composite 05-06, 08-09, 05i


RGB 05-06, 08-09, 05i Example: Advection Jet

05 - 06

08 - 09

05i

In RGB 05-06,08-09,05i images, dry descending stratospheric air related to an advection jet appears in reddish colours !



RGB 05-06, 08-09, 05i Example: Advection Jet

MSG-1, 7 January 2005, 22:00 UTC


RGB 05-06, 08-09, 05i Example: Warm Airmass

05 - 06

08 - 09

05i

In RGB 05-06,08-09,05i images, warm airmasses with high tropopause appear in greenish colours !



RGB 05-06, 08-09, 05i Example: Warm Airmass



RGB 05-06, 08-09, 05i Example: Cold Airmass

05 - 06

08 - 09

05i

In RGB 05-06,08-09,05i images, cold airmasses with low tropopause appear in bluish colours !



RGB 05-06, 08-09, 05i Example: Cold Airmass



RGB 05-06, 08-09, 05i

Global View

MSG-119 April 200510:00 UTC

Note: warm airmasses seen at a high satellite viewing angle appear with a bluish colour (limb cooling effect) !


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

Version 1.0, 20 April 2005 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB IMAGES:...

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