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EESA09H3 (200)
Lecture 9

EESA09H3 Lecture 9: PART A- Wind & Pollution


Department
Environmental Science
Course Code
EESA09H3
Professor
Tanzina Mohsin
Lecture
9

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EESA09 Lecture 9: Wind & Pollution
Long Range Transport of Pollutants in the Arctic
TYPES OF POLLUTANTS:
Artic Haze phenomenon of a visible reddish-brown springtime haze in the atmosphere @ high
latitudes in the Arctic due to anthropogenic air pollution
- HISTORY
o First noted in 1950s by aircraft pilots
Glen Shaw (1972)
Suggested long range transport as likely mechanism for source of Arctic haze
o Seasonal variation peak in spring
Seasonal cycle on vertical distribution of Arctic Haze Barrow, Alaska
o Pooling appears to occur in Arctic b/c of
Stable atmosphere; temp.inversion (little precipitation/no washout of pollutants)
Circumpolar Circulation
Major Source is Eurasian = coal burning plants located further north
o Sinks are likely the Arctic ocean + surrounding waters
o Global circulation carries in pollutants from industrialized parts of the globe
- Constituents:
o Sulfate lvls 10-20x larger, which = greater than normal (vanadium detected)
o Mixed w/uncombusted carbon to form aerosol which blocks light + appears gray/brown-
ish in colour
90% sulphate, remainder is soot (carbon), dust
o Coal burning = maj.culprit
Trace metals (vanadium, manganese) indicate sources
o Trace constituents such as metals + persistent organic pollutants (POPs) can adhere to
the aerosols + pool in the Arctic
- IMPACTS:
o Reduced visibility **espec. In spring** - reported by airplane pilots
o Contamination of snow, ice + Arctic waters
o Bioaccumulation within ecosystem in water deposits + fish …etc
- REMEDIATION?
o Coal based emissions solution easy to identify BUT difficult to implement = reduction
of coal emissions espec in Eurasia
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