According to annual tide gauge records, how much has sea level risen from 1880 to 2000?

The correct answer indicates that sea levels have risen approximately 20 cm from 1880 to 2000, according to annual tide gauge records. This timeframe covers significant changes in global climate conditions, with increasing temperatures contributing to the thermal expansion of seawater and the melting of glaciers and ice sheets. Tide gauges provide reliable long-term data on sea-level changes, making their records essential for understanding these phenomena. The rise of about 20 cm is consistent with various studies that aggregate the detailed observations obtained from these gauges across different locations. This data is crucial for assessing the impact of rising sea levels on coastal environments, infrastructure, and ecosystems. Understanding this specific figure enables hydrographic surveyors to engage more effectively with the implications of sea-level changes in their work.