Teacher Insights: NSNIS Patiala and CSS-SRIHER launche courses in sports  |  Policy Indications: NCERT eight-week alternative academic calendar for upper primary stage  |  Policy Indications: Karnataka Retains Social Science Syllabus  |  Policy Indications: Mizoram May Reintroduce MSLC  |  Teacher Insights: West Bengal School Brings Classes to the Doorstep  |  International Edu News: AI for Cancer Care  |  International Edu News: Anti-Covid Surface Coating  |  International Edu News: Crime and Mobility  |  Science Innovations: Astrophysics to Predict Drought  |  Science Innovations: Novel Humanoid Hand  |  Science Innovations: Insects With Robotic Camera  |  Technology Inceptions: AMD Ryzen 4000 Desktop Processors  |  Technology Inceptions: Vivo X50 and X50 Pro  |  Policy Indications: NEP 2020: Focus on Learning How to Learn  |  Rajagiri Round Table: How to Develop Relationship Capital Through Education?  |  
September 30, 2019 Monday 02:42:52 PM IST

Himalayan Rock Weathering May Not Have Caused Cooling of Earth

Photo Inkrise from Pixabay.com

Researchers at Rutgers University-New Brunswick have questioned the Himalayan Rock weathering hypothesis that is believed to have caused long-term cooling of the Earth much ahead of the recent global warming phenomenon. 
The scientists Yair Rosenthal of Department of Marine and Coastal Sciences and doctoral student William Si said that accumulation of calcium carbonate in the deep sea happened over a period of 15 million years suggesting that rock weathering may not be responsible for the long term cooling.  
Over millions of years, the weathering of rocks captured carbon dioxide and rivers carried it to the ocean as dissolved inorganic carbon, which is used by algae to build their calcium carbonate shells. When algae die, their skeletons fall on the seafloor and get buried, locking carbon from the atmosphere in deep-sea sediments. 
Meanwhile, the scientists – surprisingly – also found that algae called coccolithophores adapted to the carbon dioxide decline over 15 million years by reducing their production of calcium carbonate. This reduction apparently was not taken into account in previous studies.Many scientists believe that ocean acidification from high carbon dioxide levels will reduce the calcium carbonate in algae, especially in the near future. The data, however, suggest the opposite occurred over the 15 million years before the current global warming spell.Rosenthal’s lab is now trying to answer these questions by studying the evolution of calcium and other elements in the ocean.



Comments