{"id":19789,"date":"2011-04-15T09:00:58","date_gmt":"2011-04-15T13:00:58","guid":{"rendered":"http:\/\/planetsave.com\/?p=19789"},"modified":"2011-04-15T09:00:58","modified_gmt":"2011-04-15T13:00:58","slug":"tectonic-plates-moved-by-monsoons","status":"publish","type":"post","link":"https:\/\/planetsave.com\/articles\/tectonic-plates-moved-by-monsoons\/","title":{"rendered":"Tectonic Plates Moved by Monsoons"},"content":{"rendered":"

\"\"<\/a><\/p>\n

The intensification of Indian monsoons has, according to new research, the ability to spin the Earth\u2019s tectonic plates<\/a>.<\/p>\n

According to Dr Giampiero Iaffaldano of The Australian National University, along with colleagues in France and Germany, there is a link between the motion of the Indian plate over the past 10 million years and the intensification of the Indian monsoon. Dr Iaffaldano noted that the climate-change affected monsoons have increased rainfall in northeast India by four metres annually, have also sped up the uption in the Indian tectonic plate by almost one centimetre per year.<\/p>\n

\u201cThe 100km-thick outer shell of Earth, the lithosphere, is divided into pieces called tectonic plates. Plates move in different directions at speeds in the order of centimetres per year, comparable to the speed of fingernail growth in humans.<\/p>\n

\u201cThe significance of this finding lies in recognising for the first time that long-term climate changes have the potential to act as a force and influence the motion of tectonic plates. It is known that certain geologic events caused by plate motions \u2013 for example the drift of continents, the closure of ocean basins and the building of large mountain belts \u2013 have the ability to influence climate patterns over a period of a million years.<\/p>\n

\u201cNow we know that the opposite holds as well: long-term climate change, or the natural changes in climate patterns over millions of years, can modify the motion of plates in a feedback mechanism.\u201d<\/p>\n

Dr Iaffaldano added that the finding could help unlock the causes of plate-motion events like large-scale earthquakes.<\/p>\n

\u201cWhen forces moving plates along their boundaries reach certain thresholds, earthquakes occur and energy is released. This happens cyclically, typically every several hundred years in the case of large earthquakes. However it appears that the seismic potential of plate boundaries, which is an indication of how prone these are to large earthquakes, depends, among other factors, also on how strong or weak these forces have been in the past. In other words, it depends also on the history of plates over millions of years.<\/p>\n

\u201cIn order to understand the seismic potential of plate boundaries it is important to identify all the possible factors that caused plate motion to change in the past. In that respect we have discovered that climate change could in fact be one possible candidate, something we did not consider until now.<\/p>\n

\u201cThis new knowledge shall be used to analyse the past behaviour of plates in the Earth\u2019s crust. Ultimately we aim at understanding what caused plate motions to change and which regions are currently more prone to large earthquakes. To that end, we may also have to consider the history of climate over the past million years.\u201d<\/p>\n

Source: The Australian National University<\/a>
\nImage Source:\u00a0 Desmond Kavanagh<\/a><\/p>\n

\"\"<\/div>\n","protected":false},"excerpt":{"rendered":"

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