Dust crossing the Gulf of Oman

Dust crossing the Gulf of Oman

08 May 2005 00:00 UTC

Dust crossing the Gulf of Oman
Dust crossing the Gulf of Oman

Dust crossing the Gulf of Oman.

Last Updated

21 October 2020

Published on

08 May 2005

by Jochen Kerkmann (EUMETSAT)

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Two problems faced by meteorologists in Oman are the prediction and subsequent tracking of storms blowing dust from Iran across the Gulf of Oman towards Oman itself, often with severe consequences for air and road traffic. Meteosat-5, being positioned over the Indian Ocean at 63 degrees East, partially helps to resolve this problem by allowing forecasters to track dust during day-time as it crosses the Gulf of Oman.

With Meteosat Second Generation (Meteosat-8), forecasting the movement of such dust clouds has greatly improved as the dust can be easily followed over land and sea throughout the 24 hours. A simple, yet very efficient, method to detect the dust is through a combination of three IR window channels (IR8.7, IR10.8, IR12.0) into an RGB composite image.

In this RGB composite dust shows as a purple to magenta colour (see colour interpretation ). The recommended ranges and enhancements used to display these IR channels are given in the following Figure . .

The Meteosat-8 images and animations presented below show a major dust cloud moving from Iran towards Oman on 8 May.

The dust cloud had already started three days earlier, on 5 May, when an outbreak of cold air triggered a post-frontal dust storm over Iraq (also called the Shamal, see upper left image). The outbreak of cold air reached Iran on 6–7 May causing large dust storms that moved towards the Gulf of Oman (see left image of second row below).

It is interesting to note the effect of the land-sea breeze circulation on the dust front when it approached the Gulf. The sea breeze actually stops the advance of the dust front towards the sea and blows the dust in the opposite direction towards the land, see Animation , 7 May, 04:00-12:00 UTC, (AVI). On 8 May, the dust cloud finally reached Oman, clearly seen from the HRV image and animation shown below.

 

Meteosat-8 Images

 
Met-8, 05 May, 12:00 UTC
Met-8, 05 May, 12:00 UTC
RGB Composite
IR12.0-IR10.8, IR10.8-IR8.7, IR10.8
Full Resolution
Met-8, 06 May, 12:00 UTC
Met-8, 06 May, 12:00 UTC
RGB Composite
IR12.0-IR10.8, IR10.8-IR8.7, IR10.8
Full Resolution
Met-8, 07 May, 12:00 UTC
Met-8, 07 May, 12:00 UTC
RGB Composite
IR12.0-IR10.8, IR10.8-IR8.7, IR10.8
Full Resolution
Met-8, 08 May, 12:00 UTC
Met-8, 08 May, 12:00 UTC
RGB Composite
IR12.0-IR10.8, IR10.8-IR8.7, IR10.8
Full Resolution

Related Content

Channel 09 (IR10.8) Animation 7 May, 04:00-12:00 UTC, (AVI)

Swirl of dust over Iraq (3 May 2005)
Large dust storm over the Middle East (23 November 2004)
Large dust storms over Sudan, Lybia and the Middle East (13 May 2004)

Met-8, 07 May, 04:00 UTC
Met-8, 07 May, 04:00 UTC
RGB Composite
NIR1.6, VIS0.8, VIS0.6
Full Resolution
Colour Interpretation
Animation 04:00-12:00 UTC (AVI)
Met-8, 07 May, 04:00 UTC
Met-8, 07 May, 04:00 UTC
RGB Composite
IR12.0–IR10.8, IR10.8–IR8.7, IR10.8
Full Resolution
Animation 04:00-12:00 UTC (AVI)
Channel 09 (IR10.8) 04:00 UTC
Met-8, 07 May , 08:00 UTC
Met-8, 07 May , 08:00 UTC
Channel 12 (HRV)
Full Resolution
Animation 04:00-12:00 UTC (AVI)
Met-8, 08 May 2005, 08:00 UTC
Met-8, 08 May 2005, 08:00 UTC
Channel 12 (HRV)
Full Resolution
Animation 04:00-12:00 UTC (AVI)
 

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