When the world is all up for climate change due to global warming, an Australian Geophysicist Dietmar Muller from University of Sydney has claimed that the churning of the Earth’s molten interior had played a vital role in sea level change over the past two to 20 million years. He claimed that in the past they have been more than 120 meters higher than present day levels.
While the causes of long and very short term (less than 2 million years) changes in sea level are well understood, Muller suggested there are also cycles of change on intermediate timescales of between 2 and 20 million years.
Another research led by Kenni Petersen from Aarhus University has also shown sea levels may change at a regional scale due to heat from below the Earth’s crust forcing sea floors to rise. In fact Professor Kurt Lambeck of Australian National University said Petersen’s research is “likely to be an important part of our understanding of long-term sea level change”.
This study comes as an intelligent parallel development to widely talked about climate change in understanding the contributions to sea level change from natural fluctuations.