National Edu News: 71st RRT Conference International on Appropriate Pedagogy of the Digital Natives  |  Guest Column: Collaboration + Research = Global Solutions   |  Teacher Insights: How Digital Technology Helps in Growth and Access to Quality Education  |  Management lessons: How Brands Use CARE to Stay on Top in Instagram  |  Hobbies &Trends: At Full Throttle  |  Finance: Bitcoin Mobile Apps Vulnerable to Security Threats: Guan-Hua Tu, MSU  |  International Edu News: Use plants' ability to tell the time to make food production more sustainable  |  International Edu News: Scientists develop new class of cancer drug with potential to treat leukaemia  |  International Edu News: Loan applications processed around midday more likely to be rejected  |  International Edu News: Researchers find climate change impacts plankton – a key marine food source  |  International Edu News: Nature must be a partner, not just a provider of services – Oxford report  |  National Edu News: Approval to MoU between India and UK on Global Innovation Partnership  |  National Edu News: Transfer of CSIR-CMERI technologies to three MSMEs  |  Parent Interventions: Child Learning Programs: How to Find the Right One for You  |  Rajagiri Round Table: Fitness Challenge for the Nation  |  
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