meansealevel

Mean sea level is a term used in oceanography and geodesy to refer to the average height of the ocean's surface over a long period, typically 19 years, which is a full lunar cycle. This averaging period is used to minimize the effects of shorter-term variations such as tides, waves, and seasonal changes. Mean sea level serves as a reference point for measuring elevations and depths. It is crucial for a variety of applications, including coastal management, navigation, and understanding climate change impacts.

Changes in mean sea level can be caused by several factors. Thermal expansion of seawater, where warmer water occupies more volume, and the melting of glaciers and ice sheets are the primary drivers of global sea level rise. Local factors such as land subsidence or uplift can also influence the observed sea level at a specific location. Monitoring mean sea level is achieved through tide gauges installed along coastlines and satellite altimetry. These measurements provide vital data for scientists studying oceanographic processes and predicting future sea level changes, which have significant implications for coastal communities and ecosystems worldwide.