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PLASTIC POLLUTION IN EARTH’S OCEANS An overview of how human and physical factors create a global pollution problem

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Page 1: PLASTIC POLLUTION IN EARTH’S OCEANS An overview of how human and physical factors create a global pollution problem

PLASTIC POLLUTION IN EARTH’S OCEANS

An overview of how human and physical factors create a global pollution problem

Page 2: PLASTIC POLLUTION IN EARTH’S OCEANS An overview of how human and physical factors create a global pollution problem

PLASTIC WASTE

Plastics were created in the late 1800s and early 1900s

Their use has accelerated over time

More plastic was produced in the ‘noughties’ than during the whole 20th Century

Page 3: PLASTIC POLLUTION IN EARTH’S OCEANS An overview of how human and physical factors create a global pollution problem

HUMAN FACTORS

Low-cost manufacturing in newly industrialising countries adds to the perception of some plastic goods being ‘throwaway’ items

Un-necessary packaging and the growth of bottled water consumption

Page 4: PLASTIC POLLUTION IN EARTH’S OCEANS An overview of how human and physical factors create a global pollution problem

OCEAN CURRENTS

The world’s oceans are dynamic systems Surface and deep flows of warm and cold water

Page 5: PLASTIC POLLUTION IN EARTH’S OCEANS An overview of how human and physical factors create a global pollution problem

SURFACE GYRES

Gyres are large-scale circular currents in the major oceans

They are a product of wind patterns and the Coriolis force (a function of Earth's rotation)

Page 6: PLASTIC POLLUTION IN EARTH’S OCEANS An overview of how human and physical factors create a global pollution problem

THE OCEAN CONVEYOR

Deep ocean currents are driven by changes in water density

These are linked with variations in water temperature and salinity

The main flows are linked to form one global ‘motorway’ system

Page 7: PLASTIC POLLUTION IN EARTH’S OCEANS An overview of how human and physical factors create a global pollution problem

NORTH PACIFIC GARBAGE PATCH

Two giant pools of ‘plastic soup’

Split into Eastern & Western areas

Slowly rotating due to the gyres

Each one is the size of Texas

One million pieces of floating plastic per square mile

Eastern Pacific Garbage Patch

Western Pacific Garbage Patch

Page 8: PLASTIC POLLUTION IN EARTH’S OCEANS An overview of how human and physical factors create a global pollution problem

DESPOILING WILDERNESS

Plastic waste makes landfall along the shorelines of many wilderness regions, far from civilisation

Pacific Hawaiian islands

Artic circle islands e.g. Muffin Island

Alaskan beaches

Page 9: PLASTIC POLLUTION IN EARTH’S OCEANS An overview of how human and physical factors create a global pollution problem

DUCK STORY

29,000 rubber ducks washed into Pacific in 1992 Nearly 20 years later they are still being carried around

the world by ocean currents

Page 10: PLASTIC POLLUTION IN EARTH’S OCEANS An overview of how human and physical factors create a global pollution problem

PLASTIC POLLUTION

Photograph & image credits:

S. Oakes (9), Wiki Commons (4,5,6,7), jdnx (10)


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