Sea level variability refers to the natural fluctuations in the height of the ocean surface over time. This variability can be caused by a number of factors, including changes in ocean circulation, temperature, and ice melt. Studying sea level variability is important for understanding the impacts of climate change on coastal areas, as changes in sea level can lead to increased flooding, erosion, and other hazards. Researchers use a variety of methods, such as satellite observations and tide gauges, to track changes in sea level and investigate the underlying causes. By improving our understanding of sea level variability, scientists can better predict future changes and implement strategies to mitigate their impacts.