About My Health Careers Internship MedBlogs Contact us
Medindia LOGIN REGISTER
Advertisement

Acid Rain may Have Led to Mass Extinction 250 Mln Yrs Ago

by Bidita Debnath on November 28, 2013 at 9:24 PM
Font : A-A+

 Acid Rain may Have Led to Mass Extinction 250 Mln Yrs Ago

Researchers has revealed that millions of years ago, rain as acidic as undiluted lemon juice may have contributed to massive die-offs on land.

About 252 million years ago, the end of the Permian period brought about a worldwide collapse known as the Great Dying, during which a vast majority of species went extinct. It is the most severe mass extinction in Earth's history.

Advertisement

The cause of such a massive extinction is a matter of scientific debate, centring on several potential causes, including an asteroid collision, similar to what likely killed off the dinosaurs 186 million years later; a gradual, global loss of oxygen in the oceans; and a cascade of environmental events triggered by massive volcanic eruptions in a region known today as the Siberian Traps.

Now scientists at Massachusetts Institute of Technology and elsewhere have simulated this last possibility, creating global climate models of scenarios in which repeated bursts of volcanism spew gases, including sulfur, into the atmosphere.
Advertisement

From their simulations, they found that sulfur emissions were significant enough to create widespread acid rain throughout the Northern Hemisphere, with pH levels reaching 2- as acidic as undiluted lemon juice. They say such acidity may have been sufficient to disfigure plants and stunt their growth, contributing to their ultimate extinction.

The results showed that both carbon dioxide and volcanic sulfur could have significantly affected the acidity of rain at the end of the Permian. Levels of carbon dioxide and other greenhouse gases may have risen rapidly at the time, in part because of Siberian volcanism.

The study is published in journal Geology.

Source: ANI
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
News Category
What's New on Medindia
First Dose of COVID-19 Vaccines May Improve Mental Health
Printed Temperature Sensors help with Continuous Temperature Monitoring
Health Benefits of Giloy
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.


Recommended Reading
Journalism on the Verge of Extinction?
NGo Reporters Without Borders explain that jorunalist's lives may be in danger and they are often .....
Study: America's China Towns Risk Extinction
An advocacy group said America's Chinatowns risk extinction as new immigrants are priced out of ......
Scientists Discover Gene Critical to Process of 'Memory Extinction'
A gene that is critical to the process of memory extinction has been discovered by scientists....
Climate Change may Have Led to Mammoths Extinction
Researchers have found proof to suggest that woolly mammoth was led to extinction because of ......

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use