The level of the Indian Ocean in the last hundred years rose to 13 cm However, it rises unevenly. Climate scientists have found out that the inhabitants of any area time to start thinking about relocation.
The fact that global warming will lead to an increase in sea level, is difficult to doubt. Many climatologists believe that the water will rise significantly before the end of the XXI century. However, exact figures are obtained by different scientists have since withdrawn them from different source data and models. For example, the Intergovernmental Panel on Climate Change believes that the world's oceans by the end of the century will rise by 0.5 meters and there are more radical forecasts on which the difference of 1.5 m If this scenario is justified, it will lead to a real catastrophe: a water will be heavily populated areas of the delta of the Ganges, Mekong, Nile and the territory of Bangladesh.
13 inches up
A team of U.S. scientists from the University of Colorado studied the changes that have occurred to the level of the Indian Ocean in the past 50 years. And made his prediction for the future. After evaluating the data of direct and satellite observations, the researchers came to the conclusion that the level of the Indian Ocean over the past hundred years has risen by 13 cm The process was uneven: in some waters rose to the level of 18 cm, in others — only 2? 3 cm
"Professionals little is known about what happens to the sea level at the regional level, — the head of Professor Weiqing Han (Weiqing Han). — Observations on the level of the Indian Ocean is limited to short time interval, so to speak about the changes at the regional level, it was difficult. However, this problem is very acute, because the Indian Ocean — densely populated, so it's a matter of life of countless people. "
According to forecasts of the authors, by the end of the next century, the coast of Indonesia, Sumatra and the islands of the central Indian Ocean, such as the Mascarene, will be under water: the ocean will rise higher here than anywhere else in the Indian Ocean. But the Maldives and the eastern coast of Kenya and Tanzania, the process does not affect — the level of the ocean there will remain the same.
The winds are changing sea levels
Professor Weiqing Han believes that such a pattern is associated with changes in the intensity of the main air flow over the ocean. "Our model shows that the intensity of the Walker circulation (towards the poles) and Hadley (in the direction from east to west) in the last decade has increased. These processes are largely due to the increase in greenhouse gases in the atmosphere and rising global average temperatures. More intense circulation led to a change in the direction and intensity of winds blowing over the surface of the ocean "- the study authors write.
To say exactly how much more the level of the Indian Ocean in certain areas, scientists have not yet solved, limited comparative figures "more-less". For a more accurate forecasts to measure the height of the tides (so watch the change in the level of the ocean) in a lot of different points on the coast of the Indian Ocean.
On how the scientists studied the level of the ocean, can be read in the latest issue of the journal Nature Geoscience.
Why Indonesia and Sumatra drowning, while Japan, Britain and other coastal country is not? Could it be that the lithospheric plates sink, sink into the ocean.
Exactly the same processes occur in USA and Australia, in Indian Ocean (The level of the ocean in the Bay of Bengal is constantly growing), and the islands in the North Atlantic, on the contrary — rise, grow. Increase in seismic-volcanic processes are supported not only by large and frequent earthquakes, volcanic eruptions, but also abnormal processes such as in the Urals the appearance of a hot geyser.