HOME >> BIOLOGY >> NEWS
Can ancient rocks yield clues about catastrophes like Hurricane Katrina?

An oxygen-free ocean from bottom to surface is probably the worst scenario that marine higher life can experience. Are processes and feedbacks linking the atmosphere to the deep ocean capable to cause a rapid change from an oxygen-rich to an oxygen-free deep ocean? And what are the consequences for the global carbon cycle that ultimately drive marine and terrestrial ecosystems and climate variation?

These are fundamental and burning questions on the society's agenda. Hurricane Katrina and other natural catastrophes in recent years have shown how vulnerable mankind is in the face of nature. Professor Tom Wagner of Newcastle University, England, led a cross-disciplinary study of geological records combined with climate modeling to shed new light on the mechanisms and processes that led to repetitive rapid climatic change with major impact on the ocean during past greenhouse conditions.

By analysing sediments laid down on the ocean floor about 85m years ago in the Cretaceous, the research team found evidence that Cretaceous greenhouse climate was highly variable and repeatedly resulted in major changes in ocean chemistry and deep circulation causing disastrous consequences for marine ecosystems. These extreme conditions fostered massive burial of dead organic matter from marine species, such as algae and plankton, at the sea floor, leading to the formation of distinct sediments, "marine black shale", also well known as the world's primary source for oil and gas.

Professor Wagner and colleagues uncovered evidence of the mechanisms that drove rapid and repetitive climate change by studying the quantity and content of proxy parameters in black shale in a core of sedimentary rock drilled out of the ocean bed, off Africa's Ivory Coast, and comparing these results with data from a global climate model.

The model data were used to quantify the freshwater run-off from tropical Africa into the equatorial Atlantic, where the core has been drilled, and to
'"/>

Contact: Professor Tom Wagner
thomas.Wagner@newcastle.ac.uk
44-191-246-4880
University of Newcastle upon Tyne
7-Sep-2005


Page: 1 2 3

Related biology news :

1. Immunity in social amoeba suggests ancient beginnings
2. Greenlands ancient forests shed light on stability of ice sheet
3. Modern brains have an ancient core
4. Caribbean frog populations started with single, ancient voyage on South American raft
5. Caribbean frogs started with a single, ancient voyage on a raft from South America
6. An ancient bathtub ring of mammoth fossils
7. Volcanic eruptions, ancient global warming linked
8. Fossil discovery marks earliest record of limbloss in ancient lizard
9. Smithsonian scientists report ancient chili pepper history
10. Global warming of the future is projected by ancient carbon emissions
11. UCSD scientists establish connection between life today and ancient changes in ocean chemistry

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


(Date:4/11/2017)... April 11, 2017 NXT-ID, Inc. (NASDAQ: ... company, announces the appointment of independent Directors Mr. Robin ... its Board of Directors, furthering the company,s corporate governance and ... Gino Pereira ... look forward to their guidance and benefiting from their considerable ...
(Date:4/4/2017)... , April 4, 2017   EyeLock LLC ... announced that the United States Patent and Trademark Office ... broadly covers the linking of an iris image with ... transaction) and represents the company,s 45 th issued ... patent is very timely given the multi-modal biometric capabilities ...
(Date:3/29/2017)... -- higi, the health IT company that operates the largest ... , today announced a Series B investment from BlueCross ... new investment and acquisition accelerates higi,s strategy to create ... health activities through the collection and workflow integration of ... and secures data today on behalf of over 36 ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... Personal eye wash is a basic first aid supply ... a time. So which eye do you rinse first if a dangerous substance enters both ... Duo Eye Wash with its unique dual eye piece. , “Whether its dirt and ...
(Date:10/11/2017)... ... , ... Disappearing forests and increased emissions are the main causes of the ... Especially those living in larger cities are affected by air pollution related diseases. , ... pollution-affected countries globally - decided to take action. , “I knew I had to ...
(Date:10/10/2017)... ... October 10, 2017 , ... For the second time ... US2020 STEM Mentoring Award. Representatives of the FirstHand program travelled to Washington, D.C. ... US2020. , US2020’s mission is to change the trajectory of STEM education in ...
(Date:10/10/2017)... , ... October 10, 2017 , ... ... of 13 prestigious awards honoring scientists who have made outstanding ... a scheduled symposium during Pittcon 2018, the world’s leading conference and exposition for ...
Breaking Biology Technology:
Cached News: