The impacts of global warming
Another spec point covered on flash cards.
Good luck for your exam!
- Created by: Bethany Cunningham
- Created on: 13-01-13 21:48
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Clues
- 1 degree rise:coral reefs suffer from 80% bleaching. 2 degrees rise: sea level rise by 7m. 3 degree rise: 550 million people go hungry. 4 degree rise: North Atlantic drift stops. 5 degree rise: Himalayan glaciers disappear. (5, 6)
- 60% of Africans live in coastal areas. Debt crisis: cash crops and deforestation - 70% of farmers are subsistence. (4, 8)
- A1 population 9 billion in 2050, energy efficient tech, reduce differences in wealth. A2 reduced globalisation: independent. Difference in wealth and tech change slow. B1 cleaner efficient tech. More forest in 2100 than 1900. B2 environment protect (4, 9)
- Cannot assess the impacts correctly due to the commercial fishing of cod. Increased temperature reduces phytoplankton (very fragile) causes negative multiplier effect. (4, 4, 6)
- Cold dense seawater absorbs carbon dioxide, however, carbon sinks have not increased despite rising carbon dioxide levels. (6, 5, 6)
- Competition for water especially the Nile as it crosses borders. Poor water availability and quality, increases cholera; pressure on health services and government. 25% of Africans dependent on these water sources. (7, 8)
- Due to eustatic change: change in sea level due to the amount of water. Isostatic change: movement of land in response to loss or gain of mass from changing sediment or ice sheet pressure. (3, 5, 4)
- Passes the point of the Earth returning to its former state. (7, 5)
- Thawing permafrost which releases methane (retains heat) and 40% has melted already in Siberia. (10, 6)
- Vulnerability: many jobs dependent on primary sector. United Nations Environment Programme (UNEP) in 2007 said 14 countries suffered from water scarcity and by 2032 11 more countries will join. (7, 7)
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