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:4/5/2017)... April 5, 2017 Today HYPR Corp. ... the server component of the HYPR platform is officially ... the end-to-end security architecture that empowers biometric authentication across ... has already secured over 15 million users across the ... of connected home product suites and physical access represent ...
(Date:3/30/2017)... 30, 2017 The research team of The ... (3D) fingerprint identification by adopting ground breaking 3D fingerprint minutiae recovery ... of speed and accuracy for use in identification, crime investigation, immigration ... ... A research team ...
(Date:3/24/2017)... The Controller General of Immigration from Maldives Mr. Mohamed Anwar ... prestigious international IAIR Award for the most innovative high security ePassport and ... ... Maldives Immigration Controller General, Mr. Mohamed ... the right) have received the IAIR award for the "Most innovative high ...
Breaking Biology News(10 mins):
(Date:5/24/2017)... ... May 24, 2017 , ... Patient Monitoring ... with Wi-Fi connectivity to reduce the amount of wiring in a healthcare facility ... compact mobile devices including infusion pumps, heart and hypertension monitoring, glucose monitoring, and ...
(Date:5/23/2017)... ... May 23, 2017 , ... Firmex ... solution that makes it easy for organizations to send and gather large files ... FTP software or email file size limitations. , Using the same market-tested ...
(Date:5/23/2017)... , ... May 23, 2017 ... ... an unlimited source of human cardiovascular cells for research and the development ... makes it possible to generate large numbers of cardiomyocytes (hPSC-CMs). Due to ...
(Date:5/23/2017)... ... May 22, 2017 , ... NetDimensions has been ... Aragon Research Globe™ for Corporate Learning, 2017. , Aragon Research defines Leaders as ... and effectively perform against those strategies. NetDimensions’ ranking as a Leader due to ...
Breaking Biology Technology: