CLIMATE CHANGE CAUSES
- Created by: Charlie Davies
- Created on: 29-05-14 13:08
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- CLIMATE CHANGE
- CAUSES
- recent rise in global temperature (global warming)and the rate of increase in unheard of in history
- scientific consensus that this temp. rise is caused by human enhancement of the greenhouse effect
- GREENHOUSE EFFECT
- Greenhouse gases absorb outgoing long wave radiation, so less is lost to space. Its essential to keep planet warm
- but too much in atmosphere means too much energy is trapped and the planet warms up
- Increasing CO2 and methane are main contributors towards recent rise but others include nitrous oxide, water vapour
- HUMANS INCREASING GREENHOUSE GASES BY:
- Burning fossil fuels
- CO2 is released into atmosphere
- since industrial rev in 19th C levels of atmospheric CO2 increased from 280ppm to 380ppm
- Deforestation
- plants remove CO2 from atmosphere and convert into organic matter using photsyn
- when trees copped down stop taking in CO2 instead it is released when tress burnt
- Farming
- Using nitrogen-based fertiliser increases nitrous oxide
- farming livestock produces alot of methane
- Burning fossil fuels
- Greenhouse gases absorb outgoing long wave radiation, so less is lost to space. Its essential to keep planet warm
- GREENHOUSE EFFECT
- GLOBAL IMPACTS
- Global Climate would Change
- pattern of precipitation expected to change
- wet areas expected to get wetter (mid to high latitudes- North America and Europe)
- precipitation expected to decrease by 5-20% in other areas due to ocean circulation and wind patterns
- dry areas expected to get drier
- e.g. subtropics, Australia
- dry areas expected to get drier
- pattern of precipitation expected to change
- Glaciers, Sea Ice and Ice Caps continue to melt and sea level rise
- Arctic sea ice decreased by 10-15% since 1950s
- Average global sea level expected to rise by 0.09-0.88m between 1990 and 2100
- this will flood coastal and low lying areas such as SE ASIA
- More extreme weather events
- storms, floods and droughts are likely to occur more often and be more severe due to changes in ocean circulation and wind patterns
- Conflicts over water resources could increase
- high temps. and reduced rainfall would reduce river flow and groundwater
- some areas water decrease by 10% by 2050
- water becomes valuable resource= conflict
- some areas water decrease by 10% by 2050
- high temps. and reduced rainfall would reduce river flow and groundwater
- Patterns of Agriculture would Change
- Agricultural productivity will decrease in some areas due to reduced rainfall and droughts in Africa reduce productivity
- Changes in types of crops grown. Crops prefer warmer conditions(grapes and melons) could be grown further north
- Agricultural pests and diseases may increase in some areas.
- European Corn Borer(pest of Maize) shifting northwards due to increased temp.
- Agricultural productivity will decrease in some areas due to reduced rainfall and droughts in Africa reduce productivity
- Increase in Illness and disease
- more people likely to suffer from heat-related illnesse(e.g. heat stroke)
- breathing problems likely to increase as air pollution increases
- disease vectors e.g. mosquitoes with malaria spread to regions currently too cold
- breathing problems likely to increase as air pollution increases
- more people likely to suffer from heat-related illnesse(e.g. heat stroke)
- Global Climate would Change
- UK IMPACTS
- UK CLIMATE WILL CHANGE
- Temp. will increase. By 3.9oC by 2080
- winter rainfall expected to increase. By upto 35% in western parts of UK
- summer rainfall expected to decrease by upto 49% in South
- SEA LEVELS WILL RISE
- Rise by 13-76cm by 2095
- worst affected would be Hull, Cardiff, London
- Housing and agricultural land maybe lost
- worst affected would be Hull, Cardiff, London
- Rise by 13-76cm by 2095
- DROUGHTS MAY INCREASE
- Southern England
- PATTERNS OF AGRICULTURE CHANGE
- Dairy farming may increase in the north
- Crops adapted to warmer climates could be grown in South. Peaches and Grapes
- Dairy farming may increase in the north
- UK CLIMATE WILL CHANGE
- CAUSES
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