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Conceptual Model (CM): Comma (different types). How to use MSG satellite images similarities to and improvements over MTP. Contact person: Veronika Zwatz-Meise zwatz-meise@zamg.ac.at Version 1.0. 13 July 2004. Conceptual Model (CM): Comma (different types).
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Conceptual Model (CM):Comma(different types) How to use MSG satellite images similarities to and improvements over MTP Contact person: Veronika Zwatz-Meise zwatz-meise@zamg.ac.at Version 1.0. 13 July 2004
Conceptual Model (CM):Comma(different types) • MTP channels in comparison with the corresponding MSG channels • CM: commas: IR image + relevant NWP parameters • MSG additional channels + Channel combinations • (WV and WV difference images)
MTP: ir Co As the image time between MTP and MSG differs, a shift between the cloud systems can be noticed in the two images
Sharper contours through improved space resolution MSG: Ch09 Co
Visual inspection shows only very slight changes between Ch09 and Ch10; quantitative evaluation necessary MSG: Ch10 Co
MTP: vis Co
Looks relatively similar; but: somewhat coarser space resolution MSG: Ch01 Co
Compared to Ch01: no strong differences in the cloud features; but: much better land recognition MSG: Ch02 Co
Sharper contours and more detailed colour combinations through improved space resolution in IR and additional information from 2 different VIS channels MSG: 129 Co
MTP: ir Co
MSG: Ch09 Co Sharper contours through improved space resolution
MSG: Ch10 Co Visual inspection shows only very slight changes between Ch09 and Ch10; quantitative evaluation necessary
MTP: vis Co
Looks relatively similar; but: somewhat coarser space resolution MSG: Ch01 Co Grey cloud represent transparent cloud
Compared to Ch01: no strong differences in the cloud features over the ocean; but: much better land recognition MSG: Ch02 Co transparent cloud less good visible than in Ch01
MTP:VIS(2x)+IR Co Blue: high cloud is very dominant
Sharper contours and more detailed grey-shades through improved space resolution in IR and additional information from 2 different VIS channels MSG:129 Co Dark blue: High cloud light blue: thick cells yellow: less thick cloud cells
Conceptual Model (CM):Comma(different types) • MTP channels in comparison with the corresponding MSG channels • CM: commas: IR image + relevant NWP parameters • MSG additional channels + Channel combinations • (WV and WV difference images)
Comparison of two comma types • Large Comma with thick cloud • Small Comma in high cloud
H500 Comma within huge upper level trough
Comma: PVA max is dramatically shifted to the S (frontal area) model error ? PVA at 500 hPa
H500 Comma within huge upper level trough
PVA at 500 hPa Comma: accompanied by distinct PVA max
Isotachs and PVA 300 Comma: distinct PVA max in left exit region of the jet streak
Conceptual Model (CM):Comma(different types) • MTP channels in comparison with the corresponding MSG channels • CM: commas: IR image + relevant NWP parameters • MSG additional channels + Channel combinations • WV and WV difference images
Comparison of two comma types • Large Comma with thick cloud • Small Comma in high cloud
MSG:129 Co Co: blue/grey/yellow: multilayered; cellular character in structure recognisable
MSG:129 Co Co: blue: mainly cold cloud tops
dark grey: mainly cold cloud tops very few white spots represent cells with water clouds (tops not yet ice) Co
MSG: Ch03 Co dark grey: mainly cold cloud tops some white spots represent cells with water clouds (tops not yet ice)
Co Grey shades: from Vis channels Cyan: represents the ice clouds from Ch03; cyan dominates the Co area; different shades within cyan show different vertical structure of cells
MSG:321 Grey shades: from Vis channels Cyan: represents the ice clouds from Ch03; lots of grey cells visible through the dark cyan of the Co; cells and ice clouds are somewhat decoupled Co
Co Co: cold cloud tops; only very few grey spots (represent warmer cells)
MSG: Ch04 Co Co: cold cloud tops; grey spots represent warmer cells
Co Co: red: low cell tops; water clouds magenta: thick cells with ice cloud blue: cold/ high cloud tops ; ice cloud
MSG:139 Co Co: blue: mainly cold cloud tops some magenta spots visible
MSG:134 Co Co: brown: mainly cold cloud tops some yellow spots visible