Cover Story: Mark of a School  |  Education Information: Delhi Asks Government Schools to Ensure Bag Weight Criteria  |  Management lessons: Employees Concerned About Job Meaning As Much as Pay Cheque  |  National Edu News: CBSE makes Mandatory for Schools to Become Water Efficient in Next Three Years.  |  Health Monitor: Protein Treatment to Supplement Insulin Therapy for Diabetes Developed  |  Management lessons: Failures Do Not Often Lead to Valuable Learning  |  Technology Inceptions: Apple's Latest iPhone 11 Range  |  Science Innovations: Wildflower Adapts to Climate Change  |  Parent Interventions: Family-School Initiative Benefits Students  |  Technology Inceptions: How to Reduce Heat Generated in Artificial Retina?  |  Science Innovations: How Uncertainty in Findings Impact Credibility of Climate Scientists  |  Teacher Insights: How Children Learn and Decide What to Teach  |  Health Monitor: New Solution to Reduce Tissue Damage in Heart Attack Developed  |  Education Information: AIIMS Bhubaneswar Got Second in Kayakalp Award for Second Year in a Row  |  Education Information: India gets maximum foreign students from Nepal, Karnataka for higher edu: HRD  |  
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