Global average sea level has risen by about 17 cm between 1900 and 2005. This is a much faster rate than in the previous 3,000 years.
The sea level changes for several reasons, including rising temperatures as fossil fuel burning increases the amount of greenhouse gases in the atmosphere. In a warming climate, the seas are expected to rise at faster rates, increasing the risk of flooding along our coasts. But until now we didn’t know what fraction of the rise was the result of human activities.
In research published in Nature Climate Change, Australia’s Commonwealth Scientific and Industrial Research Organisation, CSIRO, shows for the first time that the burning of fossil fuels is responsible for the majority of sea level rise since the late 20th century.
As the amount of greenhouse gases we are putting into the atmosphere continues to increase, we need to understand how sea level responds. This knowledge can be used to help predict future sea level changes, according to CSIRO.