Conceptual Models (CMs): Wave - Upper wave
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1 Conceptual Models (CMs): Wave - Upper wave How to use MSG satellite images similarities to and improvements over MTP ontact person: eronika Zwatz-Meise watz - meise @zamg. ac .at ersion 1.0. 13 July 2004
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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 [email protected] Version 1.0. 13 July 2004. CM: Wave - Upper wave. - PowerPoint PPT Presentation
Transcript of 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 [email protected] 1.0. 13 July 2004
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CM:Wave - 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 throughimproved 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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MTP:VIS(2x)+IR
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MSG:129
Sharper contours and more detailed grey-shadesthrough improved space resolution in IRand additional information from 2 different VIS channels
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CM:Wave - 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 troughat 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 frontPVA max along as well as above frontal cloud band
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CM:Wave - 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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CH03Recognition of water and ice clouds:dark grey: ice cloudswhite: water clouds
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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 hpaJet axis is along the blue stripe at the rear siderepresenting high ice cloud
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MSG:139:The IR ch09 is not invertedbut used as original radiation
Brown: thin cold ice cloudBrown-red:thick,
multilayered cloudYellow: thick water cloud
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CM:Wave - 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
drywet
wetdry
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