Scientists are studying past changes in sea level in order to make accurate future predictions of the consequence of climate change, and they are looking down to Earth's core to do so.
"In order to fully understand the sea-level change that has occurred in the past century, we need to understand the dynamics of the flow in Earth's core," said Mathieu Dumberry, a professor in physics at the University of Alberta in Canada.
The connection is through the change in the speed of Earth's rotation. Melt water from glaciers not only causes sea-level rise, but also shifts mass from the pole to the equator, which slows down the rotation.
The gravity pull from the Moon also contributes to the slow down, acting a little like a leaver break.
The scientists involved in the study are confident in predicting sea level to the end of the 21st century.


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