Navigation Links
Acid raid, ozone depletion contributed to ancient extinction
Date:11/22/2013

Washington, D.C. Around 250 million years ago, at the end of the Permian period, there was a mass extinction so severe that it remains the most traumatic known species die-off in Earth's history. Some researchers have suggested that this extinction was triggered by contemporaneous volcanic eruptions in Siberia. New results from a team including Director of Carnegie's Department of Terrestrial Magnetism Linda Elkins-Tanton show that the atmospheric effects of these eruptions could have been devastating. Their work is published in Geology.

The mass extinction included the sudden loss of more than 90 percent of marine species and more than 70 percent of terrestrial species and set the stage for the rise of the dinosaurs. The fossil record suggests that ecological diversity did not fully recover until several million years after the main pulse of the extinction. One leading candidate for the cause of this event is gas released from a large swath of volcanic rock in Russia called the Siberian Traps. Using advanced 3-D modeling techniques, the team, led by Benjamin Black of the Massachusetts Institute of Technology, was able to predict the impacts of gas released from the Siberian Traps on the end-Permian atmosphere.

Their results indicate that volcanic releases of both carbon dioxide (CO2) and sulfur dioxide (SO2) could have created highly acidic rain, potentially leaching the soil of nutrients and damaging plants and other vulnerable terrestrial organisms. Releases of halogen-bearing compounds such as methyl chloride could also have resulted in global ozone collapse.

The volcanic activity was likely episodic, producing pulses of acid rain and ozone depletion. The team concluded that the resulting drastic fluctuations in pH and ultraviolet radiation, combined with an overall temperature increase from greenhouse gas emissions, could have contributed to the end-Permian mass extinction on land.

The team also included Jean-Franois Lamarque, Christine Shields, and Jeffrey Kiehl of the National Center for Atmospheric Research.


'/>"/>

Contact: Linda Elkins-Tanton
ltelkins@dtm.ciw.edu
617-784-3817
Carnegie Institution
Source:Eurekalert  

Related biology news :

1. Ozone treated water v. lethal microbial material
2. Houston Clean Air Network offering real-time online ozone report
3. Ozones impact on soybean yield: Reducing future losses
4. University of Illinois receives grant to study ozone resistance in corn
5. Ozone levels have sizeable impact on worker productivity
6. 2 climate scientists win 2012 Vetlesen Prize for work on ozone hole, ice cores
7. Ground-level ozone falling faster than model predicted
8. NASA pinpoints causes of 2011 Arctic ozone hole
9. Ozone masks plants volatiles, plant eating insects confused
10. Its not just the heat -- its the ozone: Study highlights hidden dangers
11. Study finds depletion of alveolar macrophages linked to bacterial super-infections
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Acid raid, ozone depletion contributed to ancient extinction
(Date:4/4/2017)... 4, 2017   EyeLock LLC , a leader ... United States Patent and Trademark Office (USPTO) has issued ... linking of an iris image with a face image ... the company,s 45 th issued patent. ... timely given the multi-modal biometric capabilities that have recently ...
(Date:3/30/2017)... -- The research team of The Hong Kong Polytechnic ... by adopting ground breaking 3D fingerprint minutiae recovery and matching technology, ... accuracy for use in identification, crime investigation, immigration control, security of ... ... A research team led by Dr ...
(Date:3/28/2017)... The report "Video Surveillance Market ... Storage Devices), Software (Video Analytics, VMS), and Service (VSaaS, ... to 2022", published by MarketsandMarkets, the market was valued ... to reach USD 75.64 Billion by 2022, at a ... year considered for the study is 2016 and the ...
Breaking Biology News(10 mins):
(Date:7/26/2017)... ... July 26, 2017 , ... Joni Rutter, ... National Institutes of Health (NIH), will be one of the esteemed presenters at ... platform for a multi-stakeholder discussion on the latest advancements in the precision and ...
(Date:7/26/2017)... , July 26, 2017  Nurse practitioners play a ... the findings of a Merck Manuals survey released ... medical conference, revealed that most (88 percent) believe they spend ... treatments and prescriptions. ... Merck Manuals survey of 210 nurse ...
(Date:7/25/2017)... ... July 25, 2017 , ... ... Chuck Heinz as Executive Director of Strategic Planning. His extensive background in ... , Chuck’s professional experience encompasses marketing and differentiation consulting, business strategy development, ...
(Date:7/24/2017)... ... 24, 2017 , ... Charm Sciences, Inc. is pleased to announce the Charm® ... Interstate Milk Shipments (NCIMS) Laboratory Committee and Appendix N Committee as a drug residue ... , The NCIMS voted at its annual meeting in April, 2015 to establish a ...
Breaking Biology Technology: