Ice melting in the Arctic favored by pollution in Southeast Asia

Part of the suspended fine particles produced by human activity, particularly in South-East Asia, would contribute to the melting of ice in the Arctic. Dorothy Koch of Columbia University and James Hansen of the Goddard Institute for Space Studies (GISS) collected insightful imagery data and attempted, using the model
atmospheric circulation developed by the General Circulation Model (GISS), to determine the origin of the carbon particles present above the North Pole.

Their work, published in the Journal of Geophysical Research, shows a correlation between the melting, in time and space, of Arctic glaciers and the quantities of "soot" produced by man during the 20th century . Indeed, soot particles, when deposited on ice, promote the absorption of light, accelerating thawing and their presence in the northern sky alters the meteorology by warming the air. The phenomenon is therefore not only the consequence of global warming.

Read also: Global warming: scientists at the bedside of the planet

About one-third of the source of pollution in the Arctic comes from carbon emissions in Southeast Asia, another third from forest fires and other wild-type fires, and the rest from Western industrial smoke and pollution. And while the pollution of the industrialized countries circulates in fairly low atmospheric currents, that from Asia takes higher ascending routes to the troposphere.

LAT 24 / 03 / 05 (Airbone soot adds to artic melting, study finds)

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