A new study has brought out the hard facts that for much of the 20th century - until about 1990 - sea level was about 30 percent less than earlier research had figured. However, about 25 years ago the rise in the levels was comparatively faster and the acceleration in 1990 was more dramatic than had been imagined or calculated.
As revealed in the journal Nature the present sea level rise rate that began in 1990 is calculated to be 2.5 times faster than it was from 1900 to 1990 – these are matters of grave concern.
Previous research had revealed that between 1900 and 1990, the seas rose about 2cm a decade while, the rise during 1900-1990 was less than 1.3cm every decade.
In the opinion of scientists, such a fast pace can be attributed to the melting ice sheets in Greenland and West Antarctica apart from shrinking glaciers that have been triggered by man-made global warming.
Lead author of the study Carling Hay, a geophysical researcher at Harvard University, feels that this trend is not good news for the cities along the US East Coast where water levels are rising at a much faster rate than the world average.
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