Navigation Links
Significant role of oceans in onset of ancient global cooling
Date:5/26/2011

rrents associated with modern ocean circulation has existed for the past 33 million years," said Major.

Previous research had placed the development of the deep ACC--greater than 2,000 meters water depth--in the late Oligocene, approximately 23-25 million years ago.

That's well after the global cooling pattern had been established.

Katz and colleagues have placed the global impact of the ACC at approximately 30 million years ago, when it was still just a shallow current.

Oceans and global temperatures are closely linked. Warmer ocean waters result in warmer air temperatures and vice versa.

In the more tropical environs of the Eocene, ocean circulation was weaker and currents more diffuse.

As a result, heat was more evenly distributed around the world. That resulted in fairly mild ocean temperatures worldwide.

Today, ocean temperatures vary considerably and redistribute warm and cold water around the globe.

"As the global ocean currents were formed and strengthened, the redistribution of heat likely played a significant role in the overall cooling of the Earth," Katz said.

No current is more major than the ACC, scientists believe.

Often referred to as the "mixmaster" of the ocean, the ACC thermally isolates Antarctica by preventing the warm surface waters of subtropical gyres from passing through.

The ACC instead redirects some of that warm water back toward the north Atlantic, creating Antarctic Intermediate Water.

This blocking of heat enabled the formation and preservation of the Antarctic ice sheets, according to Katz.

The circumpolar circulation, Katz concludes, was responsible for the development of the modern four-layer ocean current and heat distribution system.

Katz looked at the uptake of several elements' isotopes, or variants, in the fossil skeletons of small planktonic organisms found in ocean sediments.

Using the dril
'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Drug therapy shows significant benefit in treating a leading cause of childhood blindness
2. MedNet Solutions Announces Significant Enhancements to ENLIGHTEN, Its Flagship EDC / eClinical Solution
3. MedNet Solutions Announces Significant Enhancements to ENLIGHTEN, Its Flagship EDC / eClinical Solution
4. New study shows soy protein lowers non-HDL cholesterol significantly more than milk protein
5. Slight change in wind turbine speed significantly reduces bat mortality
6. Significant weight-loss from surgery decreases risk for cardiovascular disease in women
7. Fractures significantly reduce quality of life in women with osteoporosis
8. Online release of North American industrial pollution data reveals significant reporting gaps
9. Scientists identify seamounts as significant, unexplored territory
10. Significant findings about protein architecture may aid in drug design, generation of nanomaterials
11. New discovery is a significant boost to cancer research
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Significant role of oceans in onset of ancient global cooling
(Date:8/6/2015)... , Aug. 6, 2015 Synaptics Inc. ... human interface solutions, today announced collaboration with Microsoft ... Windows 10. Microsoft leveraged Synaptics, deep expertise in ... system. Through stringent testing, Synaptics, ... certified with Microsoft,s Precision TouchPad (PTP) specification empowering ...
(Date:8/4/2015)... 04, 2015 ... announced the addition of the "Digital ... Service), Sub-Segment (Computer Forensics, Network Forensics, Mobile ... Service, Vertical and Region - Global Forecast ... By Component (Hardware, Software, and ...
(Date:7/31/2015)... 2015 BGI llevará a cabo la 10ª Conferencia ... 25 de octubre de 2015, en Shenzhen, ... décimo aniversario este año. Desde su inauguración en 2006, ... anuales más influyentes del mundo en los campos de ... más dinámicas, entusiastas y amenas. ICG-10 se ...
Breaking Biology News(10 mins):Synaptics Chosen for Human Interface Co-Development on Windows 10 2Digital Forensics Market - The Market Represents a Compound Annual Growth Rate (CAGR) of 11.3% From 2015 to 2020 2La 10ª Conferencia Internacional sobre Genómica (ICG-10) comienza en octubre 2La 10ª Conferencia Internacional sobre Genómica (ICG-10) comienza en octubre 3
... ports, a public enemy has infiltrated the nation's borders. Taken ... University expert, the adult female alien is the only one ... , The discovery of a single specimen of Sirex noctilio ... nation because the invasive insect species has devastated up to ...
... strains of leprosy-causing bacteria has revealed some surprises about ... across the continents by human migrations. The research, led ... in the 13 May issue of the journal Science, ... findings indicate that the world's existing leprosy infections are ...
... happen - you being in a car wreck or being bitten ... killers win a free trip to the beach. It's really no ... in a wreck are far greater than being a shark's lunch, ... has studied sharks for years. , Worldwide, about one million people ...
Cached Biology News:Alien woodwasp, threat to US pine trees, found in N.Y. 2Leprosy genome tells story of human migrations, French researchers report in Science 2Leprosy genome tells story of human migrations, French researchers report in Science 3Shark attack worries? Driving to the beach is more deadly 2
(Date:8/25/2015)... Menomonie, Wis. (PRWEB) , ... August 25, 2015 ... ... and fermentor at its research facility in Knapp, Wis. The company has added ... Biostat C15 Fermentor allows detailed data collection during bacterial or fungal fermentation process ...
(Date:8/25/2015)... ... August 25, 2015 , ... ... blade-based and rackmount computing infrastructure, today announced the launch of its next ... The latest system boasts two distinct, individually sledded workstation nodes in each ...
(Date:8/25/2015)... ... ... Temarry Recycling first received approval from the DLA (Defense Logistics Agency) in ... the DLA’s ongoing efforts to ensure that all disposal facilities they do business with ... In fact, any disposal facility that receives waste from the Federal Government must be ...
(Date:8/25/2015)... ... 2015 , ... Knowledgent , the data and analytics firm, today announced ... ensuring top companies get the best insights out of their massive volumes of data. ... as you think about the purpose of Data Governance, it is one of the ...
Breaking Biology Technology:New centrifuge and fermentor expand product development capacity at Vets Plus 2Cirrascale® Announces Next Generation High Density, Two-in-One GPU Rackmount Offering Perfect for High Performance Remote Workstations 2Cirrascale® Announces Next Generation High Density, Two-in-One GPU Rackmount Offering Perfect for High Performance Remote Workstations 3Temarry Recycling Passes Defense Logistics Agency Audit With Flying Colors 2New White Paper Explores How Governance Enables Successful Data Initiatives 2
... Receives $249,500 in Additional Financing, YONKERS, N.Y., ... Board: ADVR), announced today that it has,commenced a ... healing., The Phase IIb trial is being ... Germany, led by Eckhart Kampgen, M.D.,Associate Professor for ...
... Pharma (N30), a,biopharmaceutical company focused on the discovery, ... bioavailability,announced today that it has completed a financing ... use proceeds from this financing to advance its ... and preclinical,research in the area of small molecule ...
... Fund Up to $25 Million to Advance P-552, ... Kainos,Medicines, Inc. today announced that they have entered into ... P-552,for the treatment of dry mouth associated with primary ... collaborate in the clinical,development of P-552. Kainos will provide ...
Cached Biology Technology:Advanced Viral Announces Phase IIb Wound Healing Trial for AVR123 2Advanced Viral Announces Phase IIb Wound Healing Trial for AVR123 3N30 Pharma Announces Financing, Expansion of Board 2Parion Sciences and Kainos Medicines Sign Clinical Development Agreement for Novel Dry Mouth Treatment 2Parion Sciences and Kainos Medicines Sign Clinical Development Agreement for Novel Dry Mouth Treatment 3