havnivåstigningen

Havnivåstigningen, or sea-level rise, refers to the increase in the average global sea level. This phenomenon is primarily driven by two main factors related to climate change: thermal expansion of seawater and the melting of glaciers and ice sheets. As the Earth's temperature rises due to increased greenhouse gas emissions, the oceans absorb a significant amount of this heat, causing the water to expand. Simultaneously, land-based ice masses, such as the Greenland and Antarctic ice sheets, as well as mountain glaciers, are melting at an accelerated rate, adding more water to the oceans.

The consequences of sea-level rise are far-reaching. Coastal communities are particularly vulnerable to increased flooding, erosion, and saltwater intrusion into freshwater sources. Low-lying islands and delta regions face the risk of inundation and permanent submersion. This can lead to displacement of populations, damage to infrastructure, and significant economic losses. Furthermore, rising sea levels can disrupt coastal ecosystems, such as wetlands and coral reefs, impacting biodiversity and the services they provide.

Scientific projections indicate that sea levels will continue to rise throughout the 21st century and beyond, with the rate and magnitude depending on future greenhouse gas emissions and the response of the ice sheets. International efforts are underway to mitigate climate change and adapt to the impacts of sea-level rise, including reducing emissions, protecting coastlines, and developing strategies for managing affected communities.