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EESA09H3 (185)
Lecture 9

Lecture 9

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Department
Environmental Science
Course
EESA09H3
Professor
Tanzina Mohsin
Semester
Winter

Description
Lecture 9: Wind and Pollution Long range transport of pollutants in the Arctic What are they? Arctic haze o Because Arctic haze is kind of unexpected o There is there is snow all year round, not expected, because there is no factories, industries o First noted by pilots, who saw a haze over Arctic, mainly dominant in the winter o The pooling is the main cause o Constituents Mainly sulphate, 10-20 times larger, compared to Toronto, other cities The sulphate fix with unconbusted carbon and they block the sunlight and a haze appears 90% sulphate, rest is carbon Persistent organic pollutants (POPs) How did they get there? Why they pool in Arctic In Arctic not much precipitation Need condensation for precipitation to form Arctic has a very stable atmosphere, not much changing other than sunlight that sometimes melt the snow Circumpolar circulation o Prevents all warm water from other parts of ocean to mix with cold parts of Arctic o Keeping Arctic
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