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African Dust Event June 18 – July 3 2008 Daily Satellite Images Prepared by Bryan Lambeth, P.E. Texas Commission on Environmental Quality Monitoring Operations.

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Presentation on theme: "African Dust Event June 18 – July 3 2008 Daily Satellite Images Prepared by Bryan Lambeth, P.E. Texas Commission on Environmental Quality Monitoring Operations."— Presentation transcript:

1 African Dust Event June 18 – July 3 2008 Daily Satellite Images Prepared by Bryan Lambeth, P.E. Texas Commission on Environmental Quality Monitoring Operations Division September 2009

2 African Dust The following satellite images track dust originating from the Saharan Desert in northern Africa as it travels across the Atlantic Ocean, Caribbean Sea, and Gulf of Mexico from June 18 through July 3, 2008. Normally the ocean surface appears very dark when skies are clear and the air is clean. Clouds are usually a bright white. Haze from dust can be detected in cloud-free areas over water by a brightening of the normally dark surface. The brightness corresponds to the intensity of the haze, with greater brightness indicating a higher concentration of dust. Haze boundaries are usually not sharp with a gradual decrease in intensity near the edge of the dust cloud, unlike clouds, which usually have sharp boundaries. Higher clouds also cast tell-tale shadows in late daytime images.

3 June 18, 2008 1745 UTC Dust cloud emerging from African Coast

4 June 19, 2008 1745 UTC Clean air

5 Dust cloud moving over Cape Verde Islands June 20, 2008 1745 UTC Clean air

6 June 21, 2008 1745 UTC Dust cloud moving across Atlantic Ocean Clean air

7 June 22, 2008 1745 UTC Dust cloud moving across Atlantic Ocean Clean air

8 June 23, 2008 1745 UTC Dust cloud approaching Lesser Antilles Clean air

9 June 23, 2008 2045 UTC Dust cloud moving into Lesser Antilles Clean air

10 June 24, 2008 2045 UTC Dust cloud moving into Greater Antilles Clean air

11 June 25, 2008 2045 UTC Dust cloud moving across Greater Antilles Clean air

12 June 26, 2008 2045 UTC Dust cloud moving across Bahamas, Cuba, Northwest Caribbean Sea Clean air

13 June 26, 2008 2215 UTC Dust cloud entering Southeast Gulf of Mexico Clean air

14 Dust cloud moving across Southeast Gulf of Mexico June 27, 2008 2215 UTC

15 June 28, 2008 2215 UTC Saharan dust covers most of Gulf of Mexico More Saharan dust

16 June 29, 2008 2215 UTC Saharan dust

17 June 30, 2008 2215 UTC Saharan dust

18 July 1, 2008 2215 UTC Saharan dust

19 July 2, 2008 2215 UTC Saharan dust

20 July 3, 2008 2215 UTC Saharan dust

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