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.
The distinct layers of dirty air, often dubbed arctic haze
, have been regularly observed at high latitudes of the Northern Hemisphere since the 1950s.
It is like the difference between hard and soft water." 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.The satellite will also measure the plankton movements in the world's seas in order to establish - as a complement to knowledge on the biological productivity of the oceans - a basis for setting fishing quotas.
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.
Schnell, an atmospheric scientist with the Cooperative Institute for Research in Environmental Sciences, a joint NOAA-University of Colorado research organization in Boulder, Colo., 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.
The well-known "arctic haze
" phenomenon results from aerosol transport of contaminants from Eurasia over the polar basin into the Canadian Arctic, and here we should be right in its path.
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.