Response of air stagnation frequency to anthropogenically enhanced radiative forcing(10 page pdf, Daniel E Horton1, Harshvardhan and Noah S Diffenbaugh, Environ. Res. Lett. , Nov. 27, 2012)
Also discussed here: Greater air stagnation could lead to more deaths(EnvironmentalResearchWeb, Jan. 25, 2013)
Today we look at an application global climate models to estimate what impact changes in the atmospheric circulation would have on stagnation and as consequence, air pollution, around the world. Stagnation of the air near the ground occurs when there is light wind, little rainfall and is often accompanied by a temperature inversion which traps local emissions and allows them to accumulate. Large cities, especially in North America (New York, Atlanta, Mexico City), Europe (Rome) and Asia(New Delhi, Shanghai and Beijing), are expected to have 25% more days of stagnate air by the end of the century. This, along with the increase in the number of hot spells which promotes smog formation, is likely to aggravate the impact of air pollution on health.
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