Havnivået

Havnivået refers to the average level of the ocean's surface. It is a critical indicator of climate change and has significant implications for coastal regions worldwide. Changes in sea level are primarily driven by two factors: thermal expansion of seawater as it warms, and the melting of glaciers and ice sheets. Monitoring global sea level is achieved through a network of tide gauges and satellite altimetry, providing consistent and comprehensive data.

A rising sea level can lead to a range of adverse effects. Coastal erosion is exacerbated, threatening natural habitats and infrastructure. Increased frequency and intensity of coastal flooding during storm surges pose risks to communities and economies. Salinization of freshwater sources, such as aquifers and agricultural lands, is another concern, impacting water availability and food production.

Conversely, a falling sea level, though less common globally, can also present challenges, potentially affecting navigation and access to ports. Understanding and predicting future sea level changes is crucial for developing effective adaptation and mitigation strategies to protect vulnerable coastlines and populations. International scientific bodies, like the Intergovernmental Panel on Climate Change (IPCC), regularly assess and report on the state of global sea level and its projected future trends.