Scientists created two climate models using data on carbon dioxide level increases:
The second model better matched the observed temperature changes.
This adds to the evidence that the observed warming of the Earth is because of human activities changing the composition of the atmosphere.
Scientists can also use computer models to predict the impacts of climate change.
|What is affected||Impact|
|Ice||Melting of the Antarctic ice sheet and melting of glaciers in the Northern Hemisphere.|
|Sea levels||Likely to increase due to melted ice and expansion as temperatures increase.|
|Ocean temperature||An increase in ocean temperature could change ocean currents and the climate of countries bordering these currents (like the UK).|
|Extreme weather||Greater differences in weather, for example, more intense droughts and floods and more extreme temperatures (both hot and cold).|
|Impact on crops||Low lying farmland may be flooded. In areas where there is less rainfall droughts may make it difficult to grow crops. If there is extreme rainfall then crops could get flooded and washed away.|