Saharan dust smothers Switzerland, southern Frances

Thick sand dust blows in from the Sahara Desert on March 30, 2024, giving the sky a yellowish appearance above the French riviera city of Nice, France. [AFP] An exceptionally rare haze of Saharan dust cloaked Switzerland and southeastern France on Saturday, sparking health warnings as a yellow hue tinged the sky. The phenomenon, which began in Switzerland on Friday, brings with it "a very clear worsening of sunlight and visibility. Added to that is an increase in concentrations of fine particles," the MeteoSuisse weather service posted on X. With the dust concentrated at lower than 3,000 meters (around 9,800 feet), air quality was especially affected, with Switzerland's airCHeck monitoring application flagging high levels of pollution in a corridor stretching from the southwest to the northeast. Calculations estimate that the amount of dust reached around 180,000 tons, double the levels recorded during recent similar events, SRF Meteo forecaster Roman Brogli told public radio. In neighboring France, local authorities in the southeast and south announced that the air pollution threshold was breached on Saturday, with the Herault department asking residents, particularly those with heart or respiratory problems, to avoid intense physical effort. The Sahara Desert releases 60 to 200 million tons of mineral dust per year. While the largest particles come rapidly back down to earth, the smallest can travel thousands of kilometers. The sand gives an orange tint to snow and can impact melting processes, notably for glaciers, which are shrinking as average temperatures rise, by reducing the ice's ability to reflect sunlight. The situation is due to improve in France and Switzerland on Sunday.

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Saharan dust smothers Switzerland, southern Frances

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