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Conceptual Models (CMs): Stau (Alps)Lee waves
Snow
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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CMs:Stau (Alps) Lee waves
Snow • MTP channels in comparison with the
corresponding MSG channels• CM Stau: IR image + relevant NWP parameters
• MSG additional channels + Channel combinations
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MTP: VIS
Stau
Lee waves
Snow
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: CH01
Stau
Lee waves
Snow
Looks relatively similar;but: somewhat coarser space resolutionbest seen at lee waves
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MSG: CH02
Stau
Lee waves
Snow
Looks relatively similar;but: somewhat coarse space resolutionbest seen at lee waves ;much better recognition of vegetationas in Ch01
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MTP: IR
Stau
Lee waves
Snow
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MSG: CH09
Stau
Lee waves
Snow
Sharper contours throughimproved space resolution;especially well seen at lee waves;lee waves are better discernable in IR;relative high, cold cloud tops ?
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MTP: IR+VIS
Stau
Lee waves
Snow
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MSG: 129
Stau
Lee waves
Snow
Sharper contours and more detailed grey-shadesthrough improved space resolution in IR and additional information from 2 different VIS channels;less resolution for lee waves from the VIS channels
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MTP: WV
Drying by sinking airat lee side
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MSG: CH05
Drying by sinking airat lee side; no (nearly no) lee cloud visible; no radiation fromfarther below
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MSG: CH06
Lee waves
In CH06 are lee waves visible:radiation from lower levels reachthe satellite
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CMs:Stau
Lee waves
Snow • MTP channels in comparison with the corresponding MSG channels
• CM Stau: IR image + relevant NWP parameters
• MSG additional channels + Channel combinations
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Stau
Lee waves
Snow
Surface high pressure approachesthe Alps from SW;Stau as well as lee waves appearin N stream
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Stau
Lee waves
Snow
Upper level trough; Stau as well as lee wavesappear in NW stream
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Stau
Lee waves
Snow
Wind vectors at 850 hpa Stau within W stream at 850;lee within NW stream at 850
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Stau
Lee waves
Snow
Wind vectors at 700 hpa Stau within NW stream at 700;lee within NW stream at 700;wind turns to more NW directions
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Stau
Lee waves
Snow
Wind vectors at 500 hpa Stau within NW stream at 500;lee within NW stream at 500;wind speed is strong in all three levels
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Stau
Lee waves
Snow
Thickness + TFP Stau and lee waveswithin thickness trough
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CM:Stau
Lee waves
Snow • MTP channels in comparison with the corresponding MSG channels
• CM Stau: IR image + relevant NWP parameters
• MSG additional channels + Channel combinations
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CH01
Stau
Lee waves
Snow
Stau cloud, lee waves and snow are white;lee waves are partly only grey (thin)
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CH02
Stau
Lee waves
Snow
Stau cloud, lee waves and snow are white;lee waves are partly only grey (thin);vegetation structure and lakes clearly visible
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CH03
Stau
Lee waves
Snow
Stau cloud and lee waves are white to light grey;snow is darkgrey to black;lakes are black
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CH04
Stau
Lee waves
Snow
Interesting is black snow structure; sharp edge for Stau cloud at Alps;black area to the S cold cloud and/or (?) snow
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RGB134
Stau
Lee waves
Snow
Interesting is snow structure; brown at W-Alps where there is snow and small stripe S of Alps in Austria;are both snow ?sharp edge for Stau cloud at Alps much bettervisible as from single channels;
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RGB139
Stau
Lee waves
Snow
Interesting is snow structure; pink at W-Alps where there is snow;small stripe S of Alps in Austria has other colourseems to be high cloud;sharp edge for Stau cloud at Alps much bettervisible as from single channels;
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RGB149
Stau
Lee waves
Snow
Interesting is snow structure; pink at W-Alps where there is snow;small stripe S of Alps in Austria has other colourseems to be high cloud;sharp edge for Stau cloud at Alps much bettervisible as from single channels;
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RGB321
Stau
Lee waves
Snow
Cyan appears at the snow and typicallysuperimposed in the small stripe S of theAlps in Austria; Represents Ice cloud and snow
