Navigation Links
New discoveries could improve climate projections
Date:12/11/2009

New discoveries about the deep ocean's temperature variability and circulation system could help improve projections of future climate conditions.

The deep ocean is affected more by surface warming than previously thought, and this understanding allows for more accurate predictions of factors such as sea level rise and ice volume changes.

High ocean surface temperatures have also been found to result in a more vigorous deep ocean circulation system. This increase results in a faster transport of large quantities of warm water, with possible impacts including reduction of sea ice extent and overall warming of the Arctic.

"The deep ocean is relatively unexplored, and we need a true understanding of its many complex processes," said U.S. Geological Survey Director Marcia McNutt. "An understanding of climate change and its impacts based on sound, objective data is a keystone to the type of long-term strategies and solutions that are being discussed now at the United Nations conference in Copenhagen."

USGS scientists created the first ever 3-D reconstruction of an ocean during a past warm period, focusing on the mid-Pliocene warm period 3.3 to 3 million years ago.

"Our findings are significant because they improve our previous understanding that the deep ocean stayed at relatively constant, cold temperatures and that the deep ocean circulation system would slow down as surface temperatures increased," said USGS scientist Harry Dowsett. "By looking at conditions in the past, we acquire real data that allow us to see the global climate system as it actually functioned."

"The average temperature of the entire ocean during the mid-Pliocene was approximately one degree warmer than current conditions, showing that warming wasn't just at the surface but occurred at all depths" said USGS scientist Marci Robinson. "Temperatures were determined by analyzing marine plankton fossils, which are organisms that inhabited the water's surface, as well as fossils of bottom-dwelling organisms, known as ostracodes."

Global average surface temperatures during the mid-Pliocene were about 3C (5.5F) greater than today and within the range projected for the 21st century by the Intergovernmental Panel on Climate Change. Therefore it may be one of the closest analogs in helping to understand Earth's current and future conditions. USGS research on the mid-Pliocene is also the most comprehensive global reconstruction for any warm period.


'/>"/>

Contact: Jessica Robertson
jrobertson@usgs.gov
703-648-6624
United States Geological Survey
Source:Eurekalert

Related biology news :

1. DNA replication behavior in complex organisms may foreshadow leaps in genomic discoveries
2. New discoveries from Harvard and Baylor get to the heart of cardiovascular disease
3. UC and partners awarded $23 million to transform discoveries into real-world health solutions
4. Field stations foster serendipitous discoveries in environmental, biological sciences
5. MSU discoveries upend traditional thinking about how plants make certain compounds
6. Partnership to accelerate Trudeau Institute discoveries to patient care
7. UCR plant scientists research spawns new discoveries showing how crops survive drought
8. Newly created cancer stem cells could aid breast cancer research
9. Obesity and lack of exercise could enhance the risk of pancreatic cancer
10. Finding that 1-in-a-billion that could lead to disease
11. 60 second test could help early diagnosis of common brain diseases
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/9/2016)... , March 9, 2016 This BCC Research ... states of the RNA Sequencing (RNA Seq) market for ... as instruments, tools and reagents, data analysis, and services. ... segments of the RNA-Sequencing market such as RNA-Sequencing tools ... the main factors affecting each segment and forecast their ...
(Date:3/9/2016)... GARDENS, Fla. , March 9, 2016 /PRNewswire/ ... management authentication and enrollment solutions, today announced the ... DigitalPersona ® Altus multi-factor authentication platform. ... and InfoSec managers to step-up security where it,s ... Washington, DC . ...
(Date:3/3/2016)...  FlexTech, a SEMI Strategic Association Partner, awarded five ... Development, Leadership in Education, and, in a category new ... year of the FLEXI Awards and the winners ... past years . Judging was done on a ... criteria, by a panel of non-affiliated, independent, industry experts. ...
Breaking Biology News(10 mins):
(Date:5/25/2016)... ... May 25, 2016 , ... Thailand’s Board of Investment’s ... in San Francisco. Located at booth number 7301, representatives from the Thai Government, ... discuss the Thai biotechnology and life sciences sector. , Deputy Secretary General ...
(Date:5/25/2016)... ... ... Scientists at the University of Athens say they have evidence that the variety ... that could lead to one good one. Surviving Mesothelioma has just posted an article ... team evaluated 98 mesothelioma patients who got a second kind of drug ...
(Date:5/24/2016)... , ... May 24, 2016 , ... ... diabetes, and traumatic injuries, will be accelerated by research at Worcester Polytechnic Institute ... engines of wound healing and tissue regeneration. , The novel method, developed by ...
(Date:5/23/2016)... ... ... The need for blood donations in South Texas and across the nation is growing. , ... Center, blood donations are on the decline. In fact, donations across the country are at ... South Texas in the last four years alone. , There is no substitute for blood. ...
Breaking Biology Technology: