SEVIRI RGB Cal Module - part II

During daytime:

• Day Microphysics RGB
• 24 hour Microphysics RGB
• Natural Colours RGB

During nighttime:

• Night Microphysics RGB
• 24 hour Microphysics RGB

The stratospheric dry air protruding down is a signal for cyclogenesis. It can be best seen with the Airmass RGB having WV6.2, WV7.3 and IR9.7 (ozone channel) in it.

During day and nighttime:

• Airmass RGB

The microphysics of the cells helps to identify thunderstorms with severe updrafts. The HRV Cloud RGB provides information about the cloud top features in good spatial resolution.

During daytime

• Day Microphysics RGB
• Severe Storms RGB
• HRV Cloud RGB

During nighttime:

• Enhanced IR10.8 (not shown here)
• Dust RGB (helps to identify cirrus shield)
• Airmass RGB

During daytime

• HRV Fog RGB
• 24hour Microphysics RGB
• Day Microphysics RGB
• Snow RGB

During nighttime

• Night Microphysics RGB
• 24hour Microphysics RGB

Dust clouds:

• Dust RGB

Volcanic ash clouds:

• Ash RGB (Dust RGB)

Volcanic SO₂ gas plumes:

• Ash RGB (Dust RGB)

Snow:

• Day Microphysics RGB
• Natural Colour RGB
• HRV Fog RGB
• Snow RGB

Floods:

• HRV Fog RGB
• Natural Colour RGB

Vegetation:

• Natural Colours RGB

Forest Fires:

The IR3.9 channel is the most sensitive SEVIRI channel to sub-pixel sized fires.

During daytime:

• Day Microphysics RGB (hot spots)
• HRV Fog RGB (smoke)
• HRV Cloud RGB (smoke)
• Natural Colours RGB (smoke)
• Fire RGB (IR3.9; VIS0.8, HRV) for media (not shown here)

During nighttime:

• Night Microphysics RGB (hot spots)