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Dust storms are a major health hazard. Drought and wind contribute to the emergence of dust storms, as do poor farming and grazing practices by exposing the dust and sand to the wind. Wildfires can lead to dust storms as well. [5] One poor farming practice which contributes to dust storms is dryland farming.
The Dust Bowl was the result of a period of severe dust storms that greatly damaged the ecology and agriculture of the American and Canadian prairies during the 1930s. The phenomenon was caused by a combination of natural factors (severe drought ) and human-made factors: a failure to apply dryland farming methods to prevent wind erosion , most ...
A farmer and his two sons during a dust storm in Cimarron County, Oklahoma, April 1936; Resettlement Administration photograph by Arthur Rothstein. Farmer and Sons Walking in the Face of a Dust Storm is a 1936 photograph of the Dust Bowl taken by 21-year-old Arthur Rothstein, a photographer for the federal Resettlement Administration, while he was driving through Cimarron County, Oklahoma.
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Dryland farming caused a large dust storm in parts of Eastern Washington on October 4, 2009. Courtesy: NASA/GSFC, MODIS Rapid Response [1]. Dryland farming has evolved as a set of techniques and management practices to adapt to limited availability of water, as in the Western US and other regions affected by climate change for crops such as tomato and maize.
A dust devil seen in Amboseli National Park, Kenya in 1993. A dust devil (also known regionally as a dirt devil) is a strong, well-formed, and relatively short-lived whirlwind. Its size ranges from small (18 in/half a metre wide and a few yards/metres tall) to large (more than 30 ft/10 m wide and more than half a mile/1 km tall).
When this downdraft of cold air, or downburst, reaches the ground, it sweeps up dry, loose silt and clay (referred to collectively as dust) from the desert, forming a wall of airborne sediment that precedes the storm cloud. This dust wall can span up to 100 km (62 mi) in width and extend several kilometers in elevation.
People who had dust pneumonia often died. [1] There are no official death rates published for the Great Plains in the 1930s. In 1935, dozens of people died in Kansas from dust pneumonia. [1] Red Cross volunteers made and distributed thousands of dust masks, although some farmers and other people in the affected areas refused to wear them. [1]