Conceptual Models (CMs): Stau (Alps) Lee waves Snow

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Nov 3, 2013 (3 years and 9 months ago)

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1

Conceptual Models (CMs):


Stau (Alps)

Lee waves

Snow


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

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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 resolution

best seen at lee waves

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MSG: CH02

Stau

Lee waves

Snow

Looks relatively similar;

but: somewhat coarse space resolution

best seen at lee waves ;

much better recognition of vegetation

as in Ch01

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MTP: IR

Stau

Lee waves

Snow

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MSG: CH09

Stau

Lee waves

Snow

Sharper contours through

improved 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
-
shades

through 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 air

at lee side

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MSG: CH05

Drying by sinking air

at lee side;

no (nearly no) lee cloud


visible; no radiation from

farther below

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MSG: CH06

Lee waves

In CH06 are lee waves visible:

radiation from lower levels reach

the 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 approaches

the Alps from SW;

Stau as well as lee waves appear

in N stream

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Stau

Lee waves

Snow

Upper level trough;

Stau as well as lee waves

appear 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 waves

within 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 better

visible 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 colour

seems to be high cloud;

sharp edge for Stau cloud at Alps much better

visible 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 colour

seems to be high cloud;

sharp edge for Stau cloud at Alps much better

visible as from single channels;

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RGB321

Stau

Lee waves

Snow

Cyan appears at the snow and typically

superimposed in the small stripe S of the

Alps in Austria;

Represents Ice cloud and snow