Conceptual Models CMs: Wave Upper wave

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Conceptual Models (CMs) Wave - Upper wave

• How to use MSG satellite images
• similarities to and improvements
• over MTP

Contact person Veronika Zwatz-Meise zwatz-meise_at_z
amg.ac.at Version 1.0. 13 July 2004
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CMWave - Upper wave

• MTP channels in comparison with the corresponding
  MSG channels
• CM Wave IR image relevant NWP parameters
• MSG additional channels Channel combinations
• WV and WV difference images

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MTP ir
As the image time between MTP and MSG differs, a
shift between the cloud systems can be noticed in
the two images
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MSG ch09
Sharper contours through improved space
resolution
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MTP vis
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MSG ch01
Looks relatively similar but somewhat coarser
space resolution
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MTPVIS(2x)IR
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MSG129
Sharper contours and more detailed
grey-shades through improved space resolution in
IRand additional information from 2 different
VIS channels
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CMWave - Upper wave

• MTP channels in comparison with the corresponding
  MSG channels
• CM Wave IR image relevant NWP parameters
• MSG additional channels Channel combinations
• WV and WV difference images

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H1000
Upper wave No or only very weak surface minimum
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H500
Wave and upper wave Upper level trough at rear
side of front
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Equ. Thickness TFP
Thickness gradient and TFP transition from Kata
to Anatype TFP at leading edge typical for upper
wave
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TFP TA 700 hPa
Upper wave CA at 700 hPawithin whole cloud band
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H500 PVA
Upper level trough at rear side of front PVA max
along as well as above frontal cloud band
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CMWave - Upper wave

• MTP channels in comparison with the corresponding
  MSG channels
• CM Wave IR image relevant NWP parameters
• MSG additional channels Channel combinations
• WV and WV difference images

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Recognition of water and ice clouds dark grey
ice clouds white water clouds
CH03
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139 The IR ch09 is inverted
4 different colours within upper wave different
cloud layers and stages best separation between
colours
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139 Shear vorticity 300 hpa Jet axis is along
the blue stripe at the rear side representing
high ice cloud
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MSG139 The IR ch09 is not inverted but used as
original radiation
Brown thin cold ice cloud Brown-redthick, multi
layered cloud Yellow thick water cloud
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CMWave - Upper wave

• MTP channels in comparison with the corresponding
  MSG channels
• CM Wave IR image relevant NWP parameters
• MSG additional channels Channel combinations
• WV and WV difference images

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Ch05
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Ch06
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Ch05
Distinct black stripe only in upper layers
grey area in both levels darker in the lower
layer
No big difference between the two channels cloud
edge
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Example for dry air in lower levels below frontal
surface and jet axis
wet
dry
dry
wet
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