Class Notes (1,100,000)
CA (650,000)
UTSC (30,000)
EESA09H3 (200)
Lecture 9

EESA09H3 Lecture 9: PART A- Wind & Pollution

Environmental Science
Course Code
Tanzina Mohsin

This preview shows page 1. to view the full 4 pages of the document.
EESA09 Lecture 9: Wind & Pollution
Long Range Transport of Pollutants in the Arctic
Artic Haze phenomenon of a visible reddish-brown springtime haze in the atmosphere @ high
latitudes in the Arctic due to anthropogenic air pollution
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
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
o Coal based emissions solution easy to identify BUT difficult to implement = reduction
of coal emissions espec in Eurasia
You're Reading a Preview

Unlock to view full version