Sentences with phrase «in deep ocean circulation»

To better understand these discrepancies, a recent study published in Geophysical Research Letters investigates the drivers of changes in deep ocean circulation across a range of modern and Last Glacial Maximum (LGM, ~ 21000 years ago) climate simulations from the latest Paleoclimate Modelling Intercomparison Project (PMIP).

Changes in deep ocean circulation are measured in multiple Sv.

Over the short term, that works to prevent changes in deep ocean circulation.

Not exact matches

That wind - driven circulation change leads to cooler ocean temperatures on the surface of the eastern Pacific, and more heat being mixed in and stored in the western Pacific down to about 300 meters (984 feet) deep, said England.

But research published yesterday in the journal Nature rebuts this idea, suggesting that it was changes in ocean circulation, not winds, that predominantly led the deep water to surface near Antarctica and exhale carbon dioxide to the atmosphere.

«I never considered that weather events tens of kilometers high in the atmosphere significantly influence the decadal - to century - scale circulation kilometers deep into the ocean,» says climatologist Judah Cohen of Atmospheric and Environmental Research in Lexington, Massachusetts, who did not take part in this study.

«We argue that it was the establishment of the modern deep ocean circulation — the ocean conveyor — about 2.7 million years ago, and not a major change in carbon dioxide concentration in the atmosphere that triggered an expansion of the ice sheets in the northern hemisphere,» says Stella Woodard, lead author and a post-doctoral researcher in the Department of Marine and Coastal Sciences.

Scientists believe that the different pattern of deep ocean circulation was responsible for the elevated temperatures 3 million years ago when the carbon dioxide level in the atmosphere was arguably what it is now and the temperature was 4 degree Fahrenheit higher.

Real - world data back the claim: Accumulations of calcium carbonate in deep - sea Pacific sediments show that the Pliocene ocean experienced huge shifts at the time, with waters churning all the way from the surface down to about three kilometers deep, as would be expected from a conveyor belt — type circulation.

Climate changes that began ~ 17,700 years ago included a sudden poleward shift in westerly winds encircling Antarctica with corresponding changes in sea ice extent, ocean circulation, and ventilation of the deep ocean.

«These conditions will cause changes in phytoplankton growth and ocean circulation around Antarctica, with the net effect of transferring nutrients from the upper ocean to the deep ocean,» said lead author J. Keith Moore, UCI professor of Earth system science.

An unprecedented analysis of North Pacific ocean circulation over the past 1.2 million years has found that sea ice formation in coastal regions is a key driver of deep ocean circulation, influencing climate on regional and global scales.

A new study has found that turbulent mixing in the deep waters of the Southern Ocean, which has a profound effect on global ocean circulation and climate, varies with the strength of surface eddies — the ocean equivalent of storms in the atmosphere — and possibly also wind spOcean, which has a profound effect on global ocean circulation and climate, varies with the strength of surface eddies — the ocean equivalent of storms in the atmosphere — and possibly also wind spocean circulation and climate, varies with the strength of surface eddies — the ocean equivalent of storms in the atmosphere — and possibly also wind spocean equivalent of storms in the atmosphere — and possibly also wind speeds.

The Southern Ocean plays a pivotal role in the global overturning circulation, a system of surface and deep currents linking all oceans and one of the fundamental determinants of the planet's climate.

In the North Atlantic, more heat has been retained at deep levels as a result of changes to both the ocean and atmospheric circulations, which have led to the winter atmosphere extracting less heat from the ocean.

Its measurements of ocean saltiness will also help scientists understand how changes in salinity affect the deep currents that drive ocean circulation.

Known as the Antarctic Bottom Waters (AABW), these deep, cold waters play a critical role in regulating circulation, temperature, and availability of oxygen and nutrients throughout the world's oceans.

«The weaker overturning circulation brings less naturally CO2 - rich deep waters to the surface, which limits how much of that gas in the deep ocean escapes to the atmosphere.

Isn't the main problem that, even if we stopped adding any fossil - fuel - derived CO2 to the atmosphere, the ocean circulations haven't yet reached «steady state» — i.e., a stable thermocline and deep ocean temperature — and therefore THAT is the source of the Hansen et al. «heat in the pipeline»?

The thermohaline circulation of the global ocean is controlled in part by freshwater inputs to northern seas that regulate the strength of North Atlantic Deep Water formation by reducing surface seawater density.

Researchers carry out innovative basic and applied research programs in coral reef biology, ecology, and geology; fish biology, ecology, and conservation; shark and billfish ecology; fisheries science; deep - sea organismal biology and ecology; invertebrate and vertebrate genomics, genetics, molecular ecology, and evolution; microbiology; biodiversity; observation and modeling of large - scale ocean circulation, coastal dynamics, and ocean atmosphere coupling; benthic habitat mapping; biodiversity; histology; and calcification.

Presently, much of the Atlantic Ocean is well oxygenated (Figure 1) relative to the North Indian and Pacific Oceans, where bottom water O2 concentrations are lower because of the biological removal of O2 as thermohaline circulation moves deep waters across ocean basins from the North and South Atlantic towards the North Pacific, in isolation from the surface oOcean is well oxygenated (Figure 1) relative to the North Indian and Pacific Oceans, where bottom water O2 concentrations are lower because of the biological removal of O2 as thermohaline circulation moves deep waters across ocean basins from the North and South Atlantic towards the North Pacific, in isolation from the surface oocean basins from the North and South Atlantic towards the North Pacific, in isolation from the surface oceanocean.

For years, perhaps decades, Gray has been ascribing all sorts of climate changes and hurricane cycles to fluctuations in the Thermohaline Circulation (THC), an overturning circulation in the Atlantic ocean associated with formation of deep water in the NortCirculation (THC), an overturning circulation in the Atlantic ocean associated with formation of deep water in the Nortcirculation in the Atlantic ocean associated with formation of deep water in the North Atlantic.

The best simple answer I've seen is basically that you have to go to a 2 - box model of Earth, with warm tropics and cold poles, and then realize that thanks to the thermohaline circulation the deep oceans are coupled almost exclusively to the polar regions, and so are in the «cold» box and not the warm one or some average of them.

Partly this has to do with changes in ocean circulation taking warmer water deeper and partly as the result of the southern hemisphere having less land mass and more ocean — where the ocean has a higher thermal inertia, meaning that it takes longer for those waters to warm.

... not intended to suggest that the heat capacity exchange / transfer / transport rates used are a realistic representation of actual ocean circulation, although from what little I know, it could be a step in that general direction from using one upper and one deep ocean reservoir.

If somehow and I can't possibly imagine how, there was a huge increase in circulation between the surface and the deeper layers of the ocean, that would be disastrous for global temperatures but not upwards but downwards!

The structure of the ocean circulation basically anchors this region to something like pre-industrial temperatures, at least until deep bottom water originating in the North Atlantic also warms.

This deep ocean warming in the model occurred during negative phases of the Interdecadal Pacific Oscillation (IPO), an index of the mean state of the north and south Pacific Ocean, and was most likely in response to intensification of the wind - driven ocean circulaocean warming in the model occurred during negative phases of the Interdecadal Pacific Oscillation (IPO), an index of the mean state of the north and south Pacific Ocean, and was most likely in response to intensification of the wind - driven ocean circulaOcean, and was most likely in response to intensification of the wind - driven ocean circulaocean circulation.

This is a result of a weaker wind - driven ocean circulation, when a large decrease in heat transported to the deep ocean allows the surface ocean to warm quickly, and this in turn raises global surface temperatures.

Short - term variations in ocean heat uptake, such as the anomalous deep ocean warming of late, are due to changes in the vertical & horizontal distribution of heat in the ocean — mostly the wind - driven ocean circulation.

The deep ocean and surface water don't overturn because of differences in density, so the exchange is via global circulation.

On the other hand, the AMO hypothesis asserts that natural changes in the deep water circulation of the Atlantic Ocean drive hurricane season SST resulting in changes to both hurricane activity and GT.

The Scottish study, published in the journal Nature Geoscience, also found that the changes in circulation resulted in a reduction of the amount of oxygen in the deep ocean.

Scientists also think that the circulation of heat from the top layers of the ocean, which have been most affected to date, to the deeper oceans below may be another factor behind the «hiatus» in global warming.

Im mostly interested in shorter term variability (daily / intraseasonal / interannual), so I don't need a deep ocean circulation.

Another contributor is changes in ocean circulation which cause less heat is transported upwards from the deeper, warmer layer.

But certainly models with such a grand name as «General Circulation Model», would include average diurnal atmospheric circulation patterns in tropics, and diurnal and seasonal patterns at latitudes outside the tropics, as well as heat transfer to the deCirculation Model», would include average diurnal atmospheric circulation patterns in tropics, and diurnal and seasonal patterns at latitudes outside the tropics, as well as heat transfer to the decirculation patterns in tropics, and diurnal and seasonal patterns at latitudes outside the tropics, as well as heat transfer to the deeper ocean.

In the North Atlantic Ocean, variations in the ocean circulation affect the heat exchange to the deeper waters of the oceaIn the North Atlantic Ocean, variations in the ocean circulation affect the heat exchange to the deeper waters of the oOcean, variations in the ocean circulation affect the heat exchange to the deeper waters of the oceain the ocean circulation affect the heat exchange to the deeper waters of the oocean circulation affect the heat exchange to the deeper waters of the oceanocean.

In recent years research tied the Bølling - Allerød warming to the release of heat from warm waters originating from the deep North Atlantic Ocean, possibly triggered by a strengthening of the Atlantic meridional overturning circulation (AMOC) at the time.

The vertically integrated inventory of human emitted CO2 in the oceans is (not surprisingly) much greater in areas of cold deep convection, especially in the northern Atlantic (the falling leg of the thermohaline circulation), and much less in the tropics where the ocean is strongly stratified; absorption in the tropics really is more in the near - surface waters.

As the deep oceans turn over, on an eight - hundred - year cycle of circulation, they will take the carbon dioxide now in the atmosphere down into Davy Jones's Locker, where it will be of no use to man, beast, or plant life.

Thermohaline circulation (THC)- Large - scale circulation in the ocean that transforms low - density upper ocean waters to higher - density intermediate and deep waters and returns those waters back to the upper ocean.

The deep sea has a large enough heat capacity to absorb all that heat, but just assuming that all the heat can be fed to deep ocean without changes in the rest of circulation is not realistic.

Oceanographically, the Southern Ocean is a major driver of global ocean circulation and plays a vital role in interacting with the deep water circulation in each of the Pacific, Atlantic, and Indian ocOcean is a major driver of global ocean circulation and plays a vital role in interacting with the deep water circulation in each of the Pacific, Atlantic, and Indian ococean circulation and plays a vital role in interacting with the deep water circulation in each of the Pacific, Atlantic, and Indian oceans.

Um... while the oceans as a whole would have to cool, the sea surface would have to warm up substantially in order to transfer lots of heat to the air (and in order to warm up substantially, I suppose there would have to be reduced circulation with cold deeper waters).

Recent research at Reading University and elsewhere indicates a slowing of a deep ocean circulation system in the North Atlantic, known as the Atlantic Meridional Overturning circulation.

The Antarctic ice sheet reached the coastline for the first time at ca. 33.6 Ma and became a driver of Antarctic circulation, which in turn affected global climate, causing increased latitudinal thermal gradients and a «spinning up» of the oceans that resulted in: (1) increased thermohaline circulation and erosional pulses of Northern Component Water and Antarctic Bottom Water; (2) increased deep - basin ventilation, which caused a decrease in oceanic residence time, a decrease in deep - ocean acidity, and a deepening of the calcite compensation depth (CCD); and (3) increased diatom diversity due to intensified upwelling.

The warming reached a depth of about 10,000 feet (4,000 meters), interfering with the normal circulation process in which colder surface water descends, taking oxygen and nutrients deep into the ocean.

Either this is a truism (the sun must be heating the ocean surface first) or it is meant to take into account the complex circulations that occur in the ocean, like the Gulf Stream's involvement in a vertical rise of waters from deep ocean layers in one region and sinking of the cooled surface waters as the stream reaches its northern limit.