RGB 05-06, 04-09, 03-01
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R = Difference WV6.2 - WV7.3 G = Difference IR3.9 - IR10.8 B = Difference NIR1.6 - VIS0.6 PowerPoint PPT Presentation


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RGB 05-06, 04-09, 03-01 (“Ice Particle Size") devised by: J. Kerkmann. R = Difference WV6.2 - WV7.3 G = Difference IR3.9 - IR10.8 B = Difference NIR1.6 - VIS0.6. Applications: Severe Convective Storms, Hurricanes, High-level Wave Clouds, Dust Polluted Ice Clouds

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

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R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

RGB 05-06, 04-09, 03-01

(“Ice Particle Size")

devised by: J. Kerkmann

R = Difference WV6.2 - WV7.3

G = Difference IR3.9 - IR10.8

B = Difference NIR1.6 - VIS0.6

Applications:Severe Convective Storms, Hurricanes,

High-level Wave Clouds, Dust Polluted Ice Clouds

Area:Full MSG Viewing Area

Time:Day-Time (best around midday)


R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

RGB 05-06, 04-09, 03-01

(“Ice Particle Size")

devised by: J. Kerkmann

Recommended Range and Enhancement:

BeamChannelRangeGamma

RedWV6.2 - WV7.3-35 … +5 K1.0

GreenIR3.9 - IR10.8-5 … +60 K0.5

BlueNIR1.6 - VIS0.6-75 … +25%1.0


R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

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


R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

Small Ice Particles in Severe Convective Storms

HRV RGB 05-06,04-09,03-01

29 June 2006


R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

Small Ice Particles in Convective Clouds with Cold Base

Cb Cloud

(small ice, IR3.9r=16%)

MSG-2, 3 April 2008, 12:30 UTC


R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

Small Ice Particles in “Polluted” Clouds

Thick Ice Cloud

(small ice)

dust outbreak

MSG-1, 22 February 2007, 12:00 UTC


R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

Small Ice Particles in High-level Lee Cloudiness

Very cold clouds(lee cloudiness) withsmall ice particles

MSG-1, 19 March 2007, 08:00 UTC

RGB WV6.2-WV7.3, IR3.9-IR10.8, NIR1.6-VIS0.6


R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

Small Ice Particles in Pileus Clouds

André Simon, Mária Putsay, ÁkosHorváth:

Is the appearance of this yellow spot connected to the Pileus?

15:27 UTC

Pileus cloud

Balatonalmádi


R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

... dust changes cloud microphysics!

small ice particles

(IR3.9r > 10%)

24-h Dust Day Microphysics Ice Particle Size

Met-8, 22 February 2007, 12:00 UTC


R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

Comparison RGB 02,04r,09 vs RGB 05-06,04-09,03-01

RGB 02, 04r ,09 RGB 05-06, 04-09, 03-01

better identification of young, severe storms

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


R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

RGB

Ice Particle Size

Global View

MSG-1

5 September 2004

15:00 UTC


R difference wv6 2 wv7 3 g difference ir3 9 ir10 8 b difference nir1 6 vis0 6

RGB Ice Particle SizeInterpretation of Colours

Deep precipitating cloud

(precip. not necessarily

reaching the ground)

- high-level cloud

- large 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

Thin Cirrus cloud

(large ice particles)

Thin Cirrus cloud

(small ice particles)

Ocean Land


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