Describing climatic trends
We can collect evidence to show that our climate is changing. This is due to a combination of natural factors and human influence, and the effects are multiple.
Our climate is continually changing. There is evidence for this change, for example from fossils, which tell us that at certain times the world has been much warmer than it is now, and there was little ice on the North Pole. There is also evidence to suggest that at other times the ice cover was much greater than it is today.
Evidence is collected by:
Other observations confirm evidence that the climate is changing:
Since about 1950 there is evidence of a steep climb in global temperature compared to the past. This trend is called global warming [global warming: The rise in the average temperature of the Earth's surface. In the last 100 years it is believed to have risen by 0.6°C. ].
For the last 10,000 years our climate has averaged about 14°C globally. However in the last 100 years, as the graph above shows, our climate has started to change rapidly.
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