Transcript CM: Wave - Upper wave - Facilities available on OIS

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
1
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
2
MTP: ir
As the image time between MTP and MSG differs, a shift between the cloud systems can be noticed in the two3images
MSG: ch09
Sharper contours through
improved space resolution
4
MTP: vis
5
MSG: ch01
Looks relatively similar;
but: somewhat coarser space resolution
6
MTP:VIS(2x)+IR
7
MSG:129
Sharper contours and more detailed grey-shades
through improved space resolution in IRand additional
information from 2 different VIS channels
8
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
9
H1000
Upper wave:
No or only very weak surface
minimum
10
H500
Wave and upper wave:
Upper level trough
at rear side of front 11
Equ. Thickness + TFP
Thickness gradient and TFP;
transition from Kata to Anatype;
TFP at leading edge typical for upper wave
12
TFP + TA 700 hPa
Upper wave:
CA at 700 hPawithin whole cloud band
13
H500 + PVA
Upper level trough at rear side of front
PVA max along as well as above frontal cloud band
14
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
15
CH03
Recognition of water and ice clouds:
dark grey: ice clouds
white: water clouds
16
139:
The IR ch09 is inverted
4 different colours within upper wave:
different cloud layers and stages;
best separation between colours
17
139 + Shear vorticity 300 hpa
Jet axis is along the blue stripe at the rear side
representing high ice cloud
18
MSG:139:
The IR ch09 is not inverted
but used as original radiation
Brown: thin cold ice cloud
Brown-red:thick,
multilayered cloud
19
Yellow: thick water cloud
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
20
Ch05
21
Ch06
22
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
23
24
25
Example for dry air in lower levels below frontal surface and jet axis
dry
wet
wet
dry
26
27