Is it true that the world sea level rise is not precisely fall?
Nowadays all people worried about water level changes, sea levels will rise filled with glaciers and ice chip in the poles of the earth that would melt due to global warming.
Actual level of sea water has long observed, and the glaciers and ice chips instead blamed the cause. In contrast, changes in size and depth of ocean trenches that cause change, as shown in a study by R. Dietmar Muller of the University of Sydney and his associates last week.
Study over 10 years observing the factors that affect the size and depth of the ocean trench, including the spreading of new crust in the central mountains oceans, the crust shrinking due to age and there is a change in the area because of the continent come to move.
Study published in the journal Nature suggest that at the end of the Cretaceous period, about 80 million years ago, the ocean is shallow, and sea water level is high, about 550 feet higher than now. Since then her parents along the ocean floor, the ocean became deeper and sea level fall.
Although there are periods of sea level rise, but the researchers say that in the long run actually decreasing trend in sea level will continue. Over 80 million years, sea levels will drop about 100 meters.
