Slide: 1

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

RGB 05-06, 04-09, 03-01(“Ice Particle Size")

devised by: J. Kerkmann

Applications:Applications: Severe Convective Storms, Hurricanes,High-level Wave Clouds, Dust Polluted Ice Clouds

Area:Area: Full MSG Viewing AreaTime:Time: Day-Time (best around midday)

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Recommended Range and Enhancement:Recommended Range and Enhancement:

Beam Channel Range Gamma

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

RGB 05-06, 04-09, 03-01(“Ice Particle Size")

devised by: J. Kerkmann

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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

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29 June 2006

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

Small Ice Particles in Severe Convective Storms

Slide: 5MSG-2, 3 April 2008, 12:30 UTC

Cb Cloud(small ice,

IR3.9r=16%)

Small Ice Particles in Convective Clouds with Cold Base

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

Thick Ice Cloud(small ice)

dust outbreak

Small Ice Particles in “Polluted” Clouds

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Small Ice Particles in High-level Lee Cloudiness

MSG-1, 19 March 2007, 08:00 UTCRGB WV6.2-WV7.3, IR3.9-IR10.8, NIR1.6-VIS0.6

Very cold clouds(lee cloudiness) with

small ice particles

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Balatonalmádi

Pileus cloud15:27 UTC

André Simon, Mária Putsay, Ákos Horváth:

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

Pileus?Pileus?

Small Ice Particles in Pileus Clouds

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24-h Dust Day Microphysics Ice Particle Size

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

small ice particles

(IR3.9r > 10%)

... dust changes cloud microphysics!

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

RGB 02, 04r ,09 RGB 05-06, 04-09, 03-01 better identification of young, severe storms

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

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RGB Ice Particle Size

Global View

MSG-15 September 200415:00 UTC

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RGB Ice Particle SizeInterpretation 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 strongupdrafts and severeweather)*

- high-level cloud- small ice particles

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