Effects of climate change
Transcript of Effects of climate change
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CAUSES AND EFFECTS OF CLIMATE CHANGE
Date: 24th November 2012Presented by: NARAINO MAJIE
Nabiilah
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CONTENTDefinition of Climate ChangeCauses of Climate Change- Natural Causes & Human Causes
Effects of Climate Change
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DEFINITION OF CLIMATE CHANGE “ It is a change which is attributed
directly or indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate variability observed over comparative time periods”
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CAUSES OF CLIMATE CHANGE NATURAL CAUSES
Volcanic eruptions
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Ocean currents
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Earth orbital changes- More tilt = warmer summers & colder winters
Less tilt = cooler summers & milder winters
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Solar Variation
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HUMAN CAUSES (Anthropogenic or Man-made causes)
Greenhouse gases Deforestation Coal mining Burning of fossil fuels Industrial processes Agriculture
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Deforestation
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Coal Mining
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Burning of Fossil Fuels
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Industrial processes
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Agriculture
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EFFECTS OF CLIMATE CHANGERISE IN SEA LEVEL
Melting ice sheets Sea level rise
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HEAVY RAINFALL ACROSS THE GLOBE
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EXTREME DROUGHT
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DECLINE IN CROP PRODUCTIVITY
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ECOSYSTEMS ARE CHANGING
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HURRICANES
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RISE IN TEMPERATURE
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CARBON DIOXIDE ACIDIFIES SEAWATER
CO2 and carbonate (which plankton use to make shells) combine in the ocean.
The ocean is already more acidic than it was 50 years ago.
Source: Alfred-Wegener-Institute
CO2 CO2
Ocean
Atmosphere
“shelled-critters”
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THANK YOU