The future of Baltic Sea ecosystems is a delicate race between accelerating climate change and strict, land-based environmental management. As one of the world’s largest brackish (semi-salty) bodies of water, its highly specialized environment is exceptionally vulnerable to human activity.
Scientific models predict that the Baltic Sea will undergo major physical transformations by 2100, forcing a massive restructuring of its underwater food webs. 🌊 Key Physical Changes Ahead
According to coupled physical-biogeochemical climate models, the Baltic Sea is warming faster than most global oceans:
Temperature Spike: Average water temperatures are projected to increase by 2°C to 4°C by 2100.
Disappearing Ice: Winter sea ice extent is expected to plunge by 50% to 80%, leading to more open water, changing wave climates, and modified underwater light.
Declining Salinity: Heavy projected rainfall in the northern catchment area will increase river runoff by roughly 30%. This will turn the northern and central basins significantly fresher. 🪸 Biological Shifts & “Novel” Food Webs
The combination of dropping salinity and warming waters will alter what can survive in the sea:
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