Storm surges are unusual elevations in sea level that are driven by anomalous wind stresses and low atmospheric pressures associated with storms. |
Iceland is a segment of mid-ocean ridge domed up above sea level by the plume. |
Flat as a washed-up jellyfish, the 217 hectare sand cay is only 4m above sea level at its highest point. |
The volcanic pile built up above sea level so that lavas began to be erupted subaerially. |
After the wave comes the trough, where the sea level drops below normal and the water dumped on land pours back to the sea. |
The final leg of the journey took us on a spectacular ride through picturesque mountains, with the motorway reaching 5,000 feet above sea level. |