A new study suggests that the rise of global sea levels has sped up compared to the earlier prediction of scientists. Carling Hay, lead researcher from the Department of Earth & Planetary Sciences of Harvard said the global sea levels rise in the twentieth century was not that high compared to earlier forecasts. Previous research indicated up to 6 inch rise in the sea levels during the same century, but the latest researchers claimed nearly 5 inches.

Hay reiterated that the averages are very simple, although not considered as accurate representation of the global value. Uncertainty and errors are contributory factors, saying many tide gauges that have been installed could not cover up massive areas of the ocean, hence, estimates are not final and complete, considering large gaps that require more accurate measurements.