Climate change is causing glaciers to melt faster, leading to rising sea levels. Scientists are using modern technology to accurately track these changes and predict their consequences.

Satellite Technology and GPS Monitoring

Satellite technology plays a key role in monitoring changes in the ice sheets. Professor Shfaqat Abbas Khan from DTU Space uses data from 61 GPS stations located along the coast of Greenland, known as the GNET network. These stations, managed by the Danish Climate Data Agency, measure changes in the height of Greenland's mountains with an accuracy of one tenth of a millimeter. As the ice sheet melts, the pressure on the mountains decreases, causing them to rise. For example, in the period 2013–2023, some areas have seen an increase in height of up to 20 cm.

Postglacial Uplift

It is important to note that not all changes in the terrain are caused by the current melting of glaciers. After the last ice age, there is a so-called postglacial uplift, where the land is still "straightening" after the retreat of ancient glaciers. Senior researcher Valentina Barletta from the Center for Ice Sheet and Sea Level Prediction (CISP) emphasizes that the Earth behaves like memory foam: after the pressure is released, it slowly returns to its original shape. Therefore, measurements need to correct for the data on the uplift of the ground to accurately determine the contribution of the current melting of ice to the changes in the height of the terrain.

Sea Level Rise Prediction

Accurate measurements and models are needed to predict future sea level rise. Estimates for 2100 range from 20cm to 3m, depending on the rate of glacier melt and greenhouse gas emissions. Professor Khan, head of the Centre for Ice Sheet and Sea Level Prediction, stresses that without space technology we would not have the precise data needed to make these predictions.

Global Implications and the Need for International Cooperation

Rising sea levels pose a threat to coastal communities around the world. Accurate predictions are key to planning adaptation measures and mitigating the risks associated with climate change. International cooperation and the use of modern technologies are essential to effectively address current challenges. Spring