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Photographer’s Note

The technical quality of this image is not that great as it was shot through a dirty aircraft window at over 30,000 ft, but I am posting it in the TrekEarth spirit of ‘teaching us about the world through photography’.

You may have seen on the TV news in recent weeks, images of the yellow dust and sand storms that have hit many cities in northern China (including the capital, Beijing) and have extended even as far as Korea and Japan.

This is the cause – desertification of the north-western provinces of Xinjiang and Inner Mongolia. In this photograph you can see the desert engulfing the green farmland, burying fields, roads and buildings as it moves eastwards at a rate of about 20-30 metres a year - and about to encroach on a major river.

The yellow dust is picked up by seasonal winds and carried to heights of several thousand metres. As the yellow dust passes over northern China, it picks up pollutants, including agrochemicals, and there are reports of deaths caused by lung problems brought on by the yellow dust. Airline flights are disrupted and the dust infiltrates computer chip-making plants, ruining the chips. The economic costs are enormous.

2006 has been designated by the UN as the International Year of Deserts and Desertification.

From the IYDD website:

“Desertification, in the words of UN Secretary-General Kofi Annan, is one of the world’s most alarming processes of environmental degradation. The issue is often obscured, however, by a common misperception: that it’s a ‘natural’ problem of advancing deserts in faraway developing countries.

In fact, desertification is about land degradation: the loss of the land’s biological productivity, caused by human-induced factors and climate change. It affects one third of the earth’s surface and over a billion people. Moreover, it has potentially devastating consequences in terms of social and economic costs.”

I took this from an Air China flight from Beijing to Urumqi in the autumn (the dust storms normally occur in the spring). I think it was somewhere around the Huang Valley, but I can’t be 100% sure as Chinese air routes take so many doglegs to avoid flying over military installations, it is difficult to know exactly where you are.

(Just as an aside: This photograph was the first time I have ever been able to capture a passenger jet in flight going in the opposite direction. As passenger jets cruise at about 850 kph, that means they cross at an effective speed of about 1,700 kph, so even if you have your camera ready by the window, usually by the time you have pressed the shutter release it has disappeared from view. Actually I didn’t know there was a plane in this image until I reviewed the shot on the LCD screen of my D100).

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Additional Photos by David Astley (banyanman) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1277 W: 113 N: 2603] (7737)
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