[size=1.077em]The rate at which the global oceans have risen in the past two decades is more significant than previously recognised, say US-based scientists.
[size=1.077em]Their reassessment of tide gauge data from 1900-1990 found that the world's seas went up more slowly than earlier estimates - by about 1.2mm per year.
[size=1.077em]But this makes the 3mm per year tracked by satellites since 1990 a much bigger trend change as a consequence.
[size=1.077em]It could mean some projections for future rises having to be revisited.
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