Water temperature rise

The ocean also gets warm, by about 0.04 degrees Celsius per decade. This is a general trend but at a local level these trends can change. Thus, in the province of A Coruña observations indicate that this trend is less clear than in the Cantabrian area.

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As a consequence of this warming, ice on the Poles is gradually melting, leading to a sea level rise. Historical records show that the sea level has risen about 1-2 mm/year over the 20th century. At the same time this increase varies according to the different coastal areas. For example, Galician coasts have gone through a sea level rise of 2-3 mm/year over the second half of the 20th century. This means that during the last century it has risen 10-20 cm, and by 2100 a rise of 9-88 cm is considered possible. But this sea level rise is not only attributable to ice melting but also to water expansion due to warming.

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