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Recent News and Articles on the Keywords: ocean + circulation + found  Related to the article below (Last Update: 8/5/2008)


National Science Foundation (press release)
Antarctic Fossils Paint a Picture of a Much Warmer Continent
National Science Foundation (press release) -
... abound and include phenomena as different as the levels of carbon dioxide in the atmosphere and tectonic shifts that affected ocean circulation. ...
The hottest water on Earth found in the Atlantic Ocean..
Global Surf News -
Surfersvillage Global Surf News, 4 August, 2008 : - - Deep down at the bottom of the Atlantic Ocean, geochemist Andrea Koschinsky has found something ...

Cairns Newspapers
Ocean Winds Mapping
Cairns Newspapers,  Australia -
They remove heat from the ocean, leading to the formation of "deep water" -- cold, salty, dense water that helps drive global ocean circulation patterns. ...

Royal Gazette
SAVING THE PLANET Bermuda should be a role model for other island ...
Royal Gazette, Bermuda -
There is therefore concern that this could cut off the heat conveyor belt and slow down ocean circulation. And if the ocean isn't going to move that heat ...
Full Text
Science Magazine (subscription) - Jul 31, 2008
The slower changes found in Greenland temperature and dust might be dominated by the effects of the slower changing ocean circulation and its far-field ...

Vancouver Sun
Reason found for massive ocean oxygen loss that formed Caribbean
Telegraph.co.uk, United Kingdom - Jul 16, 2008
... the Earth's oceans suffered a sudden and massive loss of oxygen that wiped out marine life and led to changes in ocean circulation and a vast amount of ...
Death in the deep: Volcanoes blamed for mass extinction AFP
Sea die-out blamed on volcanoes BBC News
Undersea Volcanic Eruptions Linked to Ancient Die-Off National Geographic
RedOrbit
all 41 news articles »

BBC News
Ocean Surface Topography Mission/Jason 2 Begins Mapping Oceans
MarketWatch - Jul 30, 2008
This information is used to monitor climate change and ocean circulation, and to enable more accurate weather, ocean and climate forecasts. ...
Jason-2 Begins Mapping To-Do List SatNews Publishers
all 36 news articles »
100 months: Why we must act now on climate change, and where to begin
New Economics Foundation, UK -
If that happens, the Earth's climate will shift into another, more volatile state, with different ocean circulation, wind and rainfall patterns. ...
Patagonian Glacier Yields Clues For Improved Understanding Of ...
Science Daily (press release) -
Geographically, it is at the interface between the tropics and the South Pole and should contain clues as to how tropical and polar atmospheric circulation ...
Arctic ice continues to thin
New Scientist (subscription), UK - Aug 2, 2008
Your weather is influenced by the ocean. Any changes in ocean circulation/temperature/current patterns will affect your weather. ...
Source: Google News

Ocean General Circulation From a Global Eddy-Resolving Model -
AJ Semtner, RM Chervin - 1992 - adsabs.harvard.edu
... at great depth and in polar latitudes is found mainly to ... heat and salt by both the
total currents and the ... the Atlantic, the Indo-Pacific, and the global ocean. ...

ON THE WIND-DRIVEN OCEAN CIRCULATION -
WH Munk - Journal of the Atmospheric Sciences, 1950 - ams.allenpress.com
... and the shape of the ocean basin ... should conform so closely to the general atmospheric
circulation. Furthermore, Fuglisterg has found a high correlation between ...

Early life histories, ocean currents, and the population genetics of Caribbean reef fishes -
MJ Shulman, E Bermingham - Evolution, 1995 - JSTOR
... gene flow throughout the Caribbean, and that this gene flow has not been constrained
by present-day ocean currents. We found statistically significant ...

… maxima) populations in the West Pacific is not consistent with dispersal by present-day ocean … -
JAH Benzie, ST Williams - Evolution, 1997 - JSTOR
... In some cases the patterns of variation found were not those expected on the basis
of ocean circulation patterns, and were, therefore, contrary to the ...

Chlorofluorocarbon uptake in a world ocean model. 1. Sensitivity to the surface gas forcing -
MH England, V Garcon, JF Minster - J. Geophys. Res, 1994 - agu.org
... In contrast, deep waters that have left the convective area with the model ocean
currents are found to be deficient in CFC-11 in the North Atlantic Ocean. ...
-

Global high-resolution mapping of ocean circulation from TOPEX/Poseidon and ERS-1 and-2 -
N Ducet, PY Le Traon - Journal of Geophysical Research, 2000 - agu.org
... of velocity statistics with World Ocean Circulation Experiment surface ... components
of the mapped currents usually present ... changes of the EKE are found in many ...
-

Thermal forcing for a global ocean circulation model using a three-year climatology of ECMWF … -
B Barnier, L Siefridt, P Marchesiello - Journal of Marine Systems, 1995 - Elsevier
... of positive values presenting a heat gain for the ocean. ... me2 in the Aghulas, East
Australian and Brazil currents). The great- est heat gains are found in the ...

[PDF] Ocean circulation and climate during the past 120, 000 years -
S Rahmstorf - Nature, 2002 - studentresearch.wcp.muohio.edu
... over the ocean with the effect declining inland. ... Variations of the Atlantic thermohaline
circulation on timescales of several decades are found in many ...
-

The Southern Ocean Limb of the Global Deep Overturning Circulation -
BM Sloyan, SR Rintoul - Journal of Physical Oceanography, 2001 - ams.allenpress.com
... 9 ). This means that the large (23?3 ? 10 6 m 3 s -1 ) overturning Indian Ocean
circulation found in this study is effectively balanced below 1500 dbar. ...

Simulations of radiocarbon in a coarse-resolution world ocean model 1. Steady state prebomb … -
JR Toggweiler, K Dixon, K Bryan - J. Geophys. Res, 1989 - adsabs.harvard.edu
... to the north.<p>This study utilizes three different realizations of the ocean
circulation. ... The prognostic version is found to produce a clearly superior deep ...

Source: Google Scholar
 

Short-circuit found in ocean circulation

Scientists have discovered how ocean circulation is working in the current that flows around Antarctica by tracing the path of helium from underwater volcanoes. The details are published in Nature this week.

The team, led by Alberto Naveira Garabato of the National Oceanography Centre, Southampton (formerly based at the University of East Anglia), has discovered a 'short-circuit' in the circulation of the world's oceans that could aid predictions about future climate change.

This process in the Southern Ocean allows cold waters that sink to the abyss to return to the surface more rapidly than previously thought.

This affects the Southern Ocean circulation, which links all the other oceans, and is also relevant to uptake and release of carbon dioxide by the sea – transport between the deep and surface waters in the Southern Ocean is particularly important for this process.

Article continues below and (thank you)
 
Understanding oceanic circulation is important because it distributes heat, carbon and nutrients around the globe and therefore plays a central role in regulating Earth's climate.

The findings show that much of the overturning circulation - how water moves and mixes vertically - around Antarctica takes place just around the tip of South America and in the small region in the Atlantic south of the Falklands, called the Scotia Sea.

Co-author Prof Andrew Watson, from the University of East Anglia’s School of Environmental Sciences, said they were fundamental findings.

“The Southern Ocean is the least well understood part of the world ocean, but one of the most important parts. We are going to have to understand its circulation before we can make really confident predictions about how the climate is going to change over the next 100 years.

“This is a piece of knowledge that will help us do that. This tells us how an important part of it works”

The research shows that a combination of rapid mixing across and rapid movement along density surfaces creates a 'short-circuit' in the overturning circulation, meaning it is more concentrated in this part of the Southern Ocean.

The researchers made use of a unique signal - the spread of helium released naturally from the Earth’s interior at deep vents in the Pacific. The helium dissolves in the deep sea and a plume of this marked water travels down the coast of Chile. It is injected at depth into the Antarctic current on the Pacific side of Cape Horn.

It then streams through into the Atlantic with the current, but in the process is spread, shifted and diffused by the circulation. Measurements of this spreading of the helium were used to deduce the ‘short-circuit’.

Dr David Stevens, from UEA’s School of Mathematics, and Wolfgang Roether, from the University of Bremen, Germany, are also co-authors.
 
 
 
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