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Polluted air masses from North America and Eurasia during winter and early spring--the so-called Arctic haze (Sirois and Barrie 1999)--complicate characterization of the Arctic aerosol.
Investigations of atmospheric aerosols and there characterization over the Arctic during summer season to study Arctic haze formation and its impact on ice melt in the region in association with changes in radiative forcing and snow scavenging.
The distinct layers of dirty air, often dubbed arctic haze, have been regularly observed at high latitudes of the Northern Hemisphere since the 1950s.
The respondents did not believe this arctic haze originated in China or Europe, as a number of scientists have contended.
Atmospheric water vapour interacts with Arctic haze particles coated by anthropogenic sulphuric acid (Bigg, 1980; Barrie, 1986) through a complex aerosol-cloud-precipitation-radiation process.
It should also show the consequences of forest fires, industrial emissions, arctic haze, dust storms and volcanic eruptions.
In summer and winter, an Arctic haze composed of other pollutants holds fallout in the air until it crosses the sea.
Although arctic haze is the main topic under investigation at Alert, other environmental damage is also coming under scrutiny.
has led several NOAA-sponsored expeditions to the Arctic, studying the Arctic haze and other environmental phenomena.
An important component of Arctic haze, black carbon (BC) aerosols affect Arctic climate via multiple pathways: absorbing/scattering solar radiation, interacting with clouds, and darkening snow and ice.
They will also examine the climate effects of Arctic haze, the infamous pollution that travels to the most northern latitudes from Europe and the Sovie Union.
However, over the Arctic Ocean, the stably stratified atmosphere may limit the vertical mixing to the surface of so-called Arctic haze, formed by the isentropic transport of anthropogenic pollutants from the midlatitudes into the Arctic and photochemical reactions at polar sunrise (Law et al.
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