The Baltic Sea is warming twice as fast as the average of the world's oceans.

Omissions

• The MEP did not cite any specific scientific study or institution for the 'twice as fast' ratio.
• The claim does not specify the time period over which the warming rate is measured; warming rates can vary significantly depending on the baseline period chosen.
• No primary source was found explicitly stating a 2:1 ratio for Baltic Sea vs. global ocean average warming; the figure is supported indirectly through multiple academic and institutional sources.
• The Nature Communications study (2024) notes the Baltic Sea is the fastest-warming coastal sea globally, which is consistent with but not identical to 'twice as fast as all oceans'.

Sources

• PrimaryCopernicus Climate Change ServiceIn Europe and the Arctic, the rate of warming is more than double the global average.
• AcademicNature Communications Earth & EnvironmentSince the early 1980ies, the shallow and brackish Baltic Sea, located in northern Europe, has warmed fastest of all the world's coastal seas.
• AcademicClimate Dynamics (Springer)The Baltic Sea is among the fastest-warming seas globally in recent decades affecting biogeochemical conditions such as euxinic areas but also pelagic and benthic ecosystems.