meteosat second generation (msg)
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METEOSAT SECOND GENERATION (MSG). DUST DETECTION Author:Jochen Kerkmann [email protected] Contributors:H.-J. Lutz (EUMETSAT). Dust Storm over the Red Sea 25 June 2003. Channel 01 (0.6 m) Channel 02 (0.8 m) Channel 03 (1.6 m). - PowerPoint PPT PresentationTRANSCRIPT
Version 0.2, 23 December 2003 Slide: 1
METEOSAT SECOND GENERATION
(MSG)
DUST DETECTION
Author:Author: Jochen KerkmannJochen [email protected]@eumetsat.de
Contributors:Contributors: H.-J. Lutz (EUMETSAT)H.-J. Lutz (EUMETSAT)
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Dust Storm over the Red Sea25 June 2003
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MSG VIS imagery on 25 June 2003 at 10:00 UTCshowing major duststorms over the Red Sea and the Arabian Peninsula.
Channel 01 (0.6 m) Channel 02 (0.8 m) Channel 03 (1.6 m)
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MSG IR imagery on 25 June 2003 at 10:00 UTCshowing major duststorms over the Red Sea and the Arabian Peninsula.
Channel 04 (3.9 m) Channel 07 (8.7 m) Channel 09 (10.8 m)
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Guinea
Mali
MSG-125 June 200310:00 UTCRGB CompositeR = NIR1.6G = VIS0.8B = VIS0.6
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Guinea
Mali
MSG-125 June 200310:00 UTCRGB CompositeR = VIS0.6G = NIR1.6B = IR3.9
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MSG-125 June 200310:00 UTCChannel 12(HRVIS)
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Guinea
MaliMSG-125 June 200310:00 UTCDifference ImageChannels NIR1.6 - VIS0.6
Monitoring of thick ice clouds (like Cb and Ns). Thin Cirrus and dust over desert are not detected.
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Guinea
Mali
MSG-125 June 200310:00 UTCDifference ImageChannels IR3.9 - IR10.8
Monitoring of fires and fog, but also useful for the detection of dust storms over deserts.
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Guinea
MaliMSG-125 June 200310:00 UTCDifference ImageChannels IR8.7 - IR10.8
Monitoring of thin Cirrus clouds, but also useful for detecting dust storms over deserts (day and night).
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Dust Storm over Niger7 July 2003
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MSG imagery showing a duststorm over Niger
MSG-17 July 200311:00 UTCChannel 01(0.6 m)
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MSG VIS imagery on 7 July 2003 at 11:00 UTCshowing a duststorm over Niger
Channel 01 (0.6 m) Channel 02 (0.8 m) Channel 03 (1.6 m)
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MSG IR imagery on 7 July 2003 at 11:00 UTCshowing a duststorm over Niger
Channel 07 (8.7 m) Channel 08 (9.7 m) Channel 09 (10.8 m)
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Diff. 3.9 m - 10.8 m Diff. 8.7 m - 10.8 m Diff. 12.0 m - 10.8 m
MSG imagery on 7 July 2003 at 11:00 UTCshowing a duststorm over Niger
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Diff. 8.7 m - 10.8 m Diff. 12.0 m - 10.8 mMSG enhanced imagery on 7 July 2003 at 11:00 UTC
showing a duststorm over Niger
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MSG imagery showing a duststorm over Niger
MSG-17 July 200311:00 UTCChannel 12(HRVIS)
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Dust Storm over Algeria14 July 2003
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MSG imagery showing a duststorm over Algeria, which was triggered by a major convetive storm (squall line)
MSG-114 July 200308:45 UTCChannel 01(0.6 m)
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MSG VIS imagery on 14 July 2003 at 08:45 UTCshowing a duststorm over Algeria
Channel 01 (0.6 m) Channel 02 (0.8 m) Channel 03 (1.6 m)
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MSG IR imagery on 14 July 2003 at 08:45 UTCshowing a duststorm over Algeria
Channel 07 (8.7 m) Channel 08 (9.7 m) Channel 09 (10.8 m)
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Diff. 3.9 m - 10.8 m Diff. 8.7 m - 10.8 m Diff. 12.0 m - 10.8 m
MSG imagery on 14 July 2003 at 08:45 UTCshowing a duststorm over Algeria
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MSG enhanced imagery on 14 July 2003 at 08:45 UTCshowing a duststorm over Algeria
Diff. 3.9 m - 10.8 m Diff. 8.7 m - 10.8 m Diff. 12.0 m - 10.8 m
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MSG-114 July 200308:45 UTCRGB CompositeR = IR12.0 - IR10.8G = IR8.7 - IR10.8B = IR3.9 - IR10.8
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MSG IR imagery on 14 July 2003 at 02:00 UTCshowing a duststorm over Algeria
Channel 07 (8.7 m) Channel 08 (9.7 m) Channel 09 (10.8 m)
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Diff. 3.9 m - 10.8 m Diff. 8.7 m - 10.8 m Diff. 12.0 m - 10.8 m
MSG imagery on 14 July 2003 at 02:00 UTCshowing a duststorm over Algeria
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MSG enhanced imagery on 14 July 2003 at 02:00 UTCshowing a duststorm over Algeria
Diff. 3.9 m - 10.8 m Diff. 8.7 m - 10.8 m Diff. 12.0 m - 10.8 m
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MSG-114 July 200302:00-08:30 UTCAnimation ofDifference ImagesIR8.7 - IR10.8
Monitoring of thin Cirrus clouds, but also very useful for detecting dust storms over deserts.
Click on the image to see the animation !
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MSG-114 July 200302:00-08:30 UTCAnimation ofDifference ImagesIR8.7 - IR10.8
Click on the image to see the animation !
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SUMMARY
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• dust storms over deserts can be detecteddust storms over deserts can be detectedin VIS and IRin VIS and IR
• VIS0.6 better than VIS0.8VIS0.6 better than VIS0.8• NIR1.6 not useful (desert dustNIR1.6 not useful (desert dust “transparent” at “transparent” at
1.6-2.0 µm)1.6-2.0 µm)• IR10.8 best single IR channel (thermal IR technique)IR10.8 best single IR channel (thermal IR technique)• IR9.7 also useful !!!IR9.7 also useful !!!• Diff. 8.7-10.8 and 3.9-10.8 give the best resultsDiff. 8.7-10.8 and 3.9-10.8 give the best results• Diff. 12.0-10.8 (used for GOES) also good, but not Diff. 12.0-10.8 (used for GOES) also good, but not
during nightduring night
Detection of Dust Storms over Deserts during Day-time
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• dust storms difficult to detect in IR (only in dust storms difficult to detect in IR (only in animation)animation)
• IR8.7 best IR channel (different emission coefficients)IR8.7 best IR channel (different emission coefficients)• Diff. 8.7-10.8 gives the best results and detects dust Diff. 8.7-10.8 gives the best results and detects dust
very well (over deserts)very well (over deserts)• Diff. 3.9-10.8 and 12.0-10.8 less usefulDiff. 3.9-10.8 and 12.0-10.8 less useful
Detection of Dust Storms over Deserts during Night-time