- Climate Change May be Worse than Believed
Hlo Drifters.. Now a days we have seen many climate changes going on due to several reasons. But do you know that in coming years it may get worse if we didn’t stopped it.
About Climate Change
The current period of climate change may be unparallel over the last 100 million years, warn scientists who discover a flaw in the way past ocean temperatures have been estimated upto now.
What Scientists Have Discovered
- According to methodology widely used by the scientific community, the temperature of the ocean depths 100 million years ago were around 15 degrees higher than current readings.
- Researchers, including those from the French National Centre fir Scientific Research (CNRS), have found that ocean temperatures may in fact have remained relatively stable throughout this period, raising serious concerns about current levels of climate change.
“If we are right, our study challenges decades of pale o climate research,” said Anders Meibomfrom the Swiss Federal institute of technology in Lausanne (EPFL)
Role of Foraminifera in Climate Change
For over 50 years, the scientific community focus its estimates on what they learn from foraminifera, which are the fossils of tiny marine organisms find in sediment cores taken from the ocean floor.
- The foraminifera form calcareous shells called tests in the content of oxygen-18 depends on the temperature of the water in which they live.
- Therefore changes on the ocean’s temperature over time were calculated on the basis of oxygen-18 content of the fossil foraminifera tests found in the sediment.
- According to these measurements, the oceans temperature has fallen by 25 degrees over 100 million years.
Future Effects of this Climate Change
All these estimates are based on the principle that the oxygen-18 content of the foraminifera tests remain constant while the fossils were lodge in the sediment.
- To test their hypothesis, they exposed these tiny organisms to high temperatures in artificial sea water that contained only oxygen-18
- Using a NanoSIMS (Nanoscale secondary ion mass spectrometer), an instrument used to run very small-scale chemical analysis, they then observed the incorporation of oxygen-18 in the calcareous shells.