devised by: D. Rosenfeld

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Presentation transcript:

devised by: D. Rosenfeld RGB 10-09, 09-04, 09 ("Night Microphysics") devised by: D. Rosenfeld R = Difference IR12.0 - IR10.8 G = Difference IR10.8 - IR3.9 B = Channel IR10.8 Applications: Cloud Analysis, Fog, Contrails, Snow Area: Full MSG Viewing Area Time: Night-Time Users: most European & African NMSs, Middle East

Physical Interpretation (for dust/ash/water/ice clouds) R = Difference IR12.0 - IR10.8 Optical Thickness, Tsurf-Tcloud G = Difference IR10.8 – IR3.9 Optical Thickness, Tsurf-Tcloud, Phase, Particle Size B = Channel IR10.8 Top Temperature

devised by: D. Rosenfeld RGB 10-09, 09-04, 09 ("Night Microphysics") devised by: D. Rosenfeld Recommended Range and Enhancement: Beam Channel Range Gamma Red IR12.0 - IR10.8 -4 … +2 K 1.0 Green IR10.8 - IR3.9 0 … +10 K 1.0 Blue IR10.8 +243 … +293 K 1.0

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

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

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

Example: Fire MSG-1, 16 May 2006, 00:00 UTC

Met-8, 14 Mar 2006, 00:00 UTC

Example: Low Clouds / Fog

RGB Night Microphysics: Interpretation of Colours for High-level Clouds Cold, thick, high-level cloud Very cold (< -50°C), thick, high-level cloud Thin Cirrus cloud Ocean Land

RGB Night Microphysics: Interpretation of Colours for Mid/Low-level Clouds Thick, mid-level cloud Thin, mid-level cloud Low-level cloud (cold atmosphere, Europe) (warm atmosphere, Africa) Ocean Land