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Version 1.0, 30 November 2004 Slide: 1 METEOSAT SECOND GENERATION (MSG) DUST DETECTION Author:Jochen Kerkmann kerkmann@eumetsat.de Contributors:H.-J. Lutz (EUMETSAT), HP. Roesli (MeteoSwiss) D. Rosenfeld (HUJ)
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Version 1.0, 30 November 2004 Slide: 2 Day-time Dust Storms over the Red Sea and the Middle East 25 June 2003
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Version 1.0, 30 November 2004 Slide: 3 MSG VIS imagery on 25 June 2003 at 10:00 UTC showing a major dust storm over the Red Sea. The dust storm over the Arabian Peninsula is not visible in VIS imagery. Channel 01 (0.6 m) Channel 02 (0.8 m) Channel 03 (1.6 m) Dust Storms
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Version 1.0, 30 November 2004 Slide: 4 MSG IR imagery on 25 June 2003 at 10:00 UTC showing a dust storm over the Arabian Peninsula. Channel 04 (3.9 m) Channel 07 (8.7 m) Channel 09 (10.8 m) Dust Storms
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Version 1.0, 30 November 2004 Slide: 5 MSG-1 25 June 2003 10:00 UTC RGB Composite R = NIR1.6 G = VIS0.8 B = VIS0.6
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Version 1.0, 30 November 2004 Slide: 6 MSG-1 25 June 2003 10:00 UTC RGB Composite R = VIS0.6 G = NIR1.6 B = IR3.9
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Version 1.0, 30 November 2004 Slide: 7 MSG-1 25 June 2003 10:00 UTC Channel 12 (HRVIS)
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Version 1.0, 30 November 2004 Slide: 8 MSG-1 25 June 2003 10:00 UTC Difference Image Channels NIR1.6 - VIS0.6 "Snow/Ice Index" Monitoring of thick ice clouds (like Cb and Ns). Thin Cirrus and dust over desert are not detected.
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Version 1.0, 30 November 2004 Slide: 9 MSG-1 25 June 2003 10:00 UTC Difference Image Channels IR3.9 - IR10.8 Monitoring of fires and fog, but also useful for the detection of dust storms over deserts. Dust Storms
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Version 1.0, 30 November 2004 Slide: 10 MSG-1 25 June 2003 10:00 UTC Difference Image Channels IR8.7 - IR10.8 Monitoring of thin Cirrus clouds, but also useful for detecting dust storms over deserts (day and night). Sulfur Plant Fire Dust Storms
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Version 1.0, 30 November 2004 Slide: 11 Day-time Dust Storm over Niger 7 July 2003
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Version 1.0, 30 November 2004 Slide: 12 MSG imagery showing a duststorm over Niger MSG-1 7 July 2003 11:00 UTC Channel 01 (0.6 m)
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Version 1.0, 30 November 2004 Slide: 13 MSG VIS imagery on 7 July 2003 at 11:00 UTC showing a duststorm over Niger Channel 01 (0.6 m) Channel 02 (0.8 m) Channel 03 (1.6 m)
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Version 1.0, 30 November 2004 Slide: 14 MSG IR imagery on 7 July 2003 at 11:00 UTC showing a duststorm over Niger Channel 07 (8.7 m) Channel 08 (9.7 m) Channel 09 (10.8 m)
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Version 1.0, 30 November 2004 Slide: 15 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 UTC showing a duststorm over Niger
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Version 1.0, 30 November 2004 Slide: 16 Diff. 8.7 m - 10.8 m Diff. 12.0 m - 10.8 m MSG enhanced imagery on 7 July 2003 at 11:00 UTC showing a duststorm over Niger
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Version 1.0, 30 November 2004 Slide: 17 MSG imagery showing a duststorm over Niger MSG-1 7 July 2003 11:00 UTC Channel 12 (HRV)
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Version 1.0, 30 November 2004 Slide: 18 Day-time Dust Storm over Algeria 14 July 2003
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Version 1.0, 30 November 2004 Slide: 19 MSG imagery showing a dust storm over Algeria, which was triggered by a major convetive storm (squall line) MSG-1 14 July 2003 08:45 UTC Channel 01 (VIS0.6)
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Version 1.0, 30 November 2004 Slide: 20 MSG VIS imagery on 14 July 2003 at 08:45 UTC showing a dust storm over Algeria Channel 01 (0.6 m) Channel 02 (0.8 m) Channel 03 (1.6 m)
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Version 1.0, 30 November 2004 Slide: 21 MSG IR imagery on 14 July 2003 at 08:45 UTC showing a dust storm over Algeria Channel 07 (8.7 m) Channel 08 (9.7 m) Channel 09 (10.8 m)
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Version 1.0, 30 November 2004 Slide: 22 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 UTC showing a dust storm over Algeria
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Version 1.0, 30 November 2004 Slide: 23 MSG enhanced imagery on 14 July 2003 at 08:45 UTC showing a dust storm 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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Version 1.0, 30 November 2004 Slide: 24 MSG-1 14 July 2003 10:00 UTC RGB Composite R = IR12.0 - IR10.8 G = IR10.8 - IR8.7 B = IR10.8 Recommended RGB for Monitoring of Dust Storms (day & night) 1=dust storm 2=clear ground 3 = low-level clouds 4 = thin high-level clouds 5 = thick high-level clouds 1 2 3 4 1 2 3 4 5 1
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Version 1.0, 30 November 2004 Slide: 25 Night-time Dust Storm over Algeria 14 July 2003
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Version 1.0, 30 November 2004 Slide: 26 MSG IR imagery on 14 July 2003 at 02:00 UTC showing a dust storm over Algeria Channel 07 (8.7 m) Channel 08 (9.7 m) Channel 09 (10.8 m)
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Version 1.0, 30 November 2004 Slide: 27 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 UTC showing a dust storm over Algeria
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Version 1.0, 30 November 2004 Slide: 28 MSG enhanced imagery on 14 July 2003 at 02:00 UTC showing a dust storm 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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Version 1.0, 30 November 2004 Slide: 29 MSG-1 14 July 2003 02:00 UTC Difference Image IR8.7 - IR10.8 Monitoring of ice clouds, but also very useful for detecting dust storms over deserts (day and night). Click on the icon to see the animation (02:00 - 08:30 UTC, AVI, 5475 KB) !
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Version 1.0, 30 November 2004 Slide: 30 MSG-1 14 July 2003 02:00 UTC Difference Image IR8.7 - IR10.8 Click on the icon to see the animation (02:00 - 08:30 UTC, AVI, 3305 KB) ! Same as previous slide, but different colour bar !
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Version 1.0, 30 November 2004 Slide: 31 Day-time Dust Storm over the Mediterranean Sea 21 February 2004
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Version 1.0, 30 November 2004 Slide: 32 MSG-1 21 February 2004 12:00 UTC RGB Composite R = HRV G = HRV B = IR10.8i Click on the icon to see the animation (07:00 - 12:00 UTC, GIF, 6134 KB) ! Dust
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Version 1.0, 30 November 2004 Slide: 33 MSG-1 21 February 2004 13:00 UTC RGB Composite R = IR12.0-IR10.8 G = IR10.8-IR8.7 B = IR10.8 Dust Thin high-level ice clouds Thick high-level ice clouds Recommended RGB for Monitoring of Dust Storms (day & night)
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Version 1.0, 30 November 2004 Slide: 34 Day & Night-time Dust Storm over Western Africa and the Canary Islands 02-04 March 2004
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Version 1.0, 30 November 2004 Slide: 35 MSG-1 03 March 2004 12:00 UTC RGB Composite R = IR12.0-IR10.8 G = IR10.8-IR8.7 B = IR10.8 Dust Contrails Click on the icon to see the animation (reduced resolution, 02-03 March 2004, 12:00 - 12:00 UTC, AVI, 21097 KB) !
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Version 1.0, 30 November 2004 Slide: 36 Click on the icon to see the animation (12:00 - 18:00 UTC, AVI, 9846 KB) ! MSG-1 3 March 2004 17:00 UTC Channel 12 (HRV) Gravity waves in the lee of Fuerteventura Dust flows around Gran Canaria and Tenerife
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Version 1.0, 30 November 2004 Slide: 37 MSG-1 3 March 2004 17:00 UTC RGB Composite R = NIR1.6 G = VIS0.8 B = VIS0.6 Click on the icon to see the animation (12:45 - 19:00 UTC, AVI, 9144 KB) ! Dust flows around Gran Canaria and Tenerife Snow
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Version 1.0, 30 November 2004 Slide: 38 Sahara Dust Outbreak across the Atlantic Ocean 04-10 March 2004
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Version 1.0, 30 November 2004 Slide: 39 MSG-1, 04 March 2004, 12:00 UTC RGB IR12.0-IR10.8, IR10.8-IR8.7, IR10.8 RGB NIR1.6, VIS0.8, VIS0.6 "Dust RGB" "Natural Colours RGB" Click for full res. (JPG, 3971 KB) Click for full res. (JPG, 3305 KB)
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Version 1.0, 30 November 2004 Slide: 40 MSG-1, 06 March 2004, 12:00 UTC RGB IR12.0-IR10.8, IR10.8-IR8.7, IR10.8 RGB NIR1.6, VIS0.8, VIS0.6 "Dust RGB" "Natural Colours RGB" Click for full res. (JPG, 3992 KB) Click for full res. (JPG, 3327 KB)
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Version 1.0, 30 November 2004 Slide: 41 MSG-1, 08 March 2004, 12:00 UTC RGB IR12.0-IR10.8, IR10.8-IR8.7, IR10.8 RGB NIR1.6, VIS0.8, VIS0.6 "Dust RGB" "Natural Colours RGB" Click for full res. (JPG, 3865 KB) Click for full res. (JPG, 3170 KB)
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Version 1.0, 30 November 2004 Slide: 42 SUMMARY
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Version 1.0, 30 November 2004 Slide: 43 dust storms over deserts can be detected in VIS and IRdust storms over deserts can be detected in VIS and IR VIS0.6 better than VIS0.8VIS0.6 better than VIS0.8 NIR1.6 not useful (desert dust “transparent” at 1.6-2.0 µm)NIR1.6 not useful (desert dust “transparent” at 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 goodDiff. 12.0-10.8 (used for GOES) also good Recommended RGB: IR12.0-IR10.8, IR10.8-IR8.7, IR10.8Recommended RGB: IR12.0-IR10.8, IR10.8-IR8.7, IR10.8 Detection of Dust Storms over Deserts during Day-time
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Version 1.0, 30 November 2004 Slide: 44 dust storms difficult to detect in IR (only in animation)dust storms difficult to detect in IR (only in 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 very well (over deserts)Diff. 8.7-10.8 gives the best results and detects dust very well (over deserts) Diff. 12.0-10.8 also usefulDiff. 12.0-10.8 also useful Diff. 3.9-10.8 less usefulDiff. 3.9-10.8 less useful Recommended RGB: IR12.0-IR10.8, IR10.8-IR8.7, IR10.8Recommended RGB: IR12.0-IR10.8, IR10.8-IR8.7, IR10.8 Detection of Dust Storms over Deserts during Night-time
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