Summary. Among the documented effects of global warming has been a rise of the average sea level around the globe since 1900. This post explains, in tutorial fashion, how this happens.
Ice cube model for melting glaciers and ice sheets. The ice cube melts at exactly 0ºC. Ice cube image from www.dreamstime.com.
Melting of Antarctic Ice Shelves. Ice shelves, such as are found in Antarctica, are large areas of ice that are the oceanic ends of land-based ice sheets that flow over the ocean and float on its surface. Ice shelves are distinguished from ice sheets by the fact that they cover ocean water, rather than land. An ice shelf is diagrammed in the graphic below:
Simplified model of an ice shelf extending over the ocean.