HOME >> BIOLOGY >> NEWS
Study finds evidence for global methane release about 600 million years ago

Scientists at the University of California, Riverside and Columbia University have found evidence of the release of an enormous quantity of methane gas as ice sheets melted at the end of a global ice age about 600 million years ago, possibly altering the ocean's chemistry, influencing oxygen levels in the ocean and atmosphere, and enhancing climate warming because methane is a powerful greenhouse gas. The study was published in today's issue of the journal Nature.

The global ice age is of particular interest to paleobiologists because it took place shortly before the first appearance of animals in the fossil record, and may have supplied an environmental drive to evolution. The Earth's most severe climate is thought to have occurred about 600 million years ago with ice sheets stretching to the tropics. Some scientists have referred to times of such extreme cold as a "snowball Earth" condition, assuming that the ocean would have been totally ice covered.

The new evidence is based on a chemical fingerprint of the methane gas from rocks in south China, which is strongly enriched in lighter carbon isotope, carbon-12, and which the researchers measured in ancient ocean carbonate sediments that were deposited as the temperature rose. The methane gas was apparently derived from the melting of frozen methane clathrate crystals that had accumulated beneath the seafloor.

"The extremely negative isotopic values from these sediments provide unambiguous evidence for methane-derived carbon," said Ganqing Jiang, a researcher at the University of California, Riverside, and the article's lead author. "The identification of a methane-derived isotope signal and widespread seep-like deposits indicate the massive passage of methane through the sediments," he added. "We now have an important record of the role methane plays in climate change and the global carbon cycle."

Methane clathrates are increasingly thought to play a role in mass extinctions associa
'"/>

Contact: Ricardo Duran
ricardo.duran@ucr.edu
909-787-5893
University of California - Riverside
17-Dec-2003


Page: 1 2

Related biology news :

1. Study: Emission of smog ingredients from trees is increasing rapidly
2. Study explores gene transfer to modify underlying course of Alzheimers disease
3. Study reveals why eyes in some paintings seem to follow viewers
4. Study by Israeli scientists provides insight on DNA code
5. Study reveals first genetic step necessary for prostate cancer growth
6. Study of flu patients reveals virus outsmarting key drug
7. Study in Science reveals recreational fishing takes big bite of ocean catch
8. Study suggests cell-cycle triggers might be cancer drug targets
9. Study narrows search for genes placing men at increased risk for prostate cancer
10. Study links high carbohydrate diet to increased breast cancer risk
11. Study explains spatial orientation differences between sexes

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/12/2019)... NEW PORT RICHEY, Fla. (PRWEB) , ... April ... ... Condition Targeted Nutraceuticals™ (CTNs), is excited to announce their efforts to help decrease ... will be available at no charge or a discounted rate, up to 50% ...
(Date:4/9/2019)... (PRWEB) , ... April 09, 2019 , ... The ... Certified Cancer Center following a rigorous and voluntary audit conducted by an independent, ... of only eight Novalis Certified Centers in the United States, McLeod is the only ...
(Date:4/4/2019)... ... April 02, 2019 , ... Orbsen Therapeutics, ... cell immunotherapies, announced it will move its base of operations from the National ... University’s newly created biotechnology park in Galway, Ireland. , “With four clinical trials ...
Breaking Biology News(10 mins):
(Date:4/8/2019)... ... April 08, 2019 , ... US Capital Global ... $15 million preferred equity investment in the privately held pharmaceutical company, S1 Biopharma (“S1”). ... Lorexys, is targeted at female hypoactive sexual dysfunction disorder and is ready to begin ...
(Date:4/4/2019)... ... April 03, 2019 , ... LeadingBiotech, an exclusive event ... today announces its Boston CEO conference to be held May 28-29, 2019 at ... opportunities with high-level panels and discussions from past, present and future change-makers. ...
(Date:3/27/2019)... ... 27, 2019 , ... In honor of National Nutrition Month, Lajollacooks4u has collaborated ... meals and good nutrition. This month, Chef Jodi Abel appeared on two segments ... , The first segment addressed the nutritional value of USDA’s MyPlate, a nutrition guide ...
(Date:3/23/2019)... PRUSSIA, Pa. (PRWEB) , ... March 22, 2019 ... ... introduction of its LenS3 Multi-Angle Light Scattering (MALS) detector , offering a ... (Rg) of synthetic polymers, polysaccharides, proteins, and biopolymers. A novel optical design, a ...
Breaking Biology Technology:
Cached News: