HOME >> BIOLOGY >> NEWS
Carbon dioxide role in past climate revealed

Researchers at the British Antarctic Survey (BAS) and the University of California, Santa Cruz have discovered that Earth's last great global warming period, 3 million years ago, may have been caused by levels of CO2 in the atmosphere similar to today's.

Reporting this week in a leading Earth Science journal, Geochemistry Geophysics Geosystems, the scientists describe how they tested two widely held ideas that attempted to explain the balmy conditions on Earth at that time. Their findings clearly demonstrate that studying past climates can help us to understand the likely impact of greenhouse gas emissions and global warming.

BAS Principal Investigator Dr Alan Haywood said, 'There are two schools of thought about past warm intervals. Many scientists suggest that they were caused by ocean currents (like the Gulf Stream) moving greater amounts of warm water from the tropics to the polar regions. Others speculate that increased levels of CO2 in the atmosphere initiated warming all over the planet. We used the latest supercomputing technology combined with chemical analysis of seabed sediments to make a sophisticated reconstruction of past sea temperatures. If the warming was caused by ocean currents, we would expect to see cooling at the tropics and warming at the poles. Conversely, if CO2 was the cause then we would expect both the tropics and the poles to warm. The sea temperature pattern we found points the finger squarely at CO2 rather than the ocean currents. This is a real breakthrough for those of us investigating past climate we've made a major contribution to a long standing argument and our findings are critical to understanding how climate may respond to emissions of greenhouse gases in the future'.

Clues to past sea-surface temperature come from tiny marine algae that live near the surface. They produce chemicals called alkenones that record the sea temperature. When the algae die they sink and become part of the seabed
'"/>

Contact: Linda Capper
L.Capper@bas.ac.uk
44-1-223-221-448
British Antarctic Survey
11-Apr-2005


Page: 1 2

Related biology news :

1. Tough tubes -- Carbon nanotubes endure heavy wear and tear
2. Carbon dioxide and the ocean
3. Carbon monoxide protects mice from multiple sclerosis
4. Carbon monoxide protects lung cells against oxygen-induced damage
5. On the cutting edge: Carbon nanotube cutlery
6. Carbon capture, water filtration, other boreal forest ecoservices worth estimated $250 billion/year
7. Carbon monoxide may help prevent debilitating pregnancy condition
8. Carbon cycle was already disrupted millions of years ago
9. Carbon monoxide inhibitor controls traumatic bleeding, Tulane University researchers show
10. Carbon nanotube absorption measured in worms, cancer cells
11. Carbon nanotubes that detect disease-causing mutations developed by Pitt researcher

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


(Date:8/26/2020)... SAN DIEGO and SHANGHAI (PRWEB) , ... August ... ... company pursuing novel approaches for the treatment of chronic inflammatory and fibrotic diseases, ... Operating Officer and Vice President of Drug Discovery. , Dr. Canan previously served ...
(Date:8/21/2020)... , ... August 18, 2020 , ... ... cell therapy, today announced that the U.S. Food and Drug Administration (FDA) has ... lead asset, SBI-101, for the treatment of severe COVID-19. Approval of this IND ...
(Date:8/12/2020)... ... August 12, 2020 , ... Mosio recently announced ... for public health agencies of all sizes. With a focus on tracking symptoms ... find appropriate health care, Mosio helps public health departments automate communications and provide ...
Breaking Biology News(10 mins):
(Date:7/31/2020)... ... July 29, 2020 , ... ... radar transmitter systems that can be configured to drive Klystrons, TWTs, IOTs, and ... can drive one or two switches in a push-pull configuration; yielding fast fall ...
(Date:7/31/2020)... ... July 30, 2020 , ... ... life sciences industry, today announced the release of its signature product called ... Science Liaisons (MSLs) and other field medical professionals. , Beacon helps ...
(Date:7/18/2020)... ... July 17, 2020 , ... dicentra , a leading ... food industries, is pleased to announce that Charles Galea has joined its clinical ... Charles is an accomplished and results-driven sales executive with over 10 years of ...
(Date:7/7/2020)... ... , ... R3 International is now offering stem cell therapy for Alzheimers dementia ... on the patient's condition, treatment may be offered IV, intrathecal or with a combination. ... Alzheimers dementia, and the incidence continues to increase as individuals live longer. There is ...
Breaking Biology Technology:
Cached News: