Depiction of a 15-foot hurricane storm surge occurring at high tide of two feet about mean sea level, creating a seventeen foot storm tide. Note that there are 10-foot waves on top of the 17-foot ...

If you look on any topographical map, you’ll notice that elevations are reported in height above (or occasionally, below) sea level. Pilots often report altitudes in AMSL, or Above Mean Sea Level.

In the process, Hardenberg gives us a richly detailed yet very accessible history of how over five centuries, the concept of measuring mean sea level was a painstaking process that advanced in ...

The IPCC's likely range projected global mean sea level to rise by 0.3 to 0.6 meters. Under a high-emissions scenario, the NTU fusion model projects global mean sea level will very likely rise ...