sea level rise concerns

Rate of sea-level rise 'steeper'

The rate at which the global oceans have risen in the past two decades is more significant than previously recognised, say US-based scientists.

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.

But this makes the 3mm per year tracked by satellites since 1990 a much bigger trend change as a consequence.

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