Sea level change refers to the long-term fluctuations in the average global sea level over time. It is influenced by a variety of factors, including the melting of polar ice caps, thermal expansion of ocean water, and changes in ocean currents. Sea level change can have significant impacts on coastal communities, ecosystems, and infrastructure, making it an important area of study for researchers in fields such as climate science, oceanography, and geology. Scientists use a combination of satellite data, tide gauges, and computer models to monitor and predict sea level changes on both global and regional scales.