Sentences with phrase «winter air trapping»

Weather conditions in Beijing and the surrounding regions often compound the particulates generated by coal burning, cars and industry, with cold winter air trapping the pollution.

Not exact matches

Air pollution trapped by winter inversions along Utah's Wasatch Front, the state's most populated region, is estimated to send more than 200 people to the emergency room with pneumonia each year, according to a study by University of Utah Health and Intermountain Healthcare.

Due to the topography of the region, though, air pollution may become trapped in the high mountain valleys of the Wasatch Front — especially during temperature inversions, which typically occur in the winter months.

In winter, particulate levels can be twice as high as during the summer, because «inversion layers» of warm air trap cold air close to the ground.

During winters when this effect is pronounced, more cold air gets trapped in the stratosphere above the South Pole, and as a result, more ice crystals form in the atmosphere.

For instance, the relatively snowless and mild winter in the U.S. of 2011 - 12 resulted from an inversion of the jet stream; its «U» course though the North America flipped upside down, trapping warm air over much of the central and eastern U.S.

The cells trap air, keeping it warm in the winter and cool in the summer.