Sentences with phrase «changes in ocean circulation»

«The weakening and strengthening of the stratospheric circulation seems to correspond with changes in ocean circulation in the North Atlantic,» Reichler says.

Changes in ocean circulation could either enhance or inhibit ocean uptake.

These experiments provide new insight into mechanisms of past climate changes on Earth, which have been driven in part by tectonic changes in ocean basins and consequent changes in ocean circulation and heat transport.

This in turn helps explain how factors such as fresh water from melting ice or changes in global wind patterns might lead to large - scale changes in ocean circulation or climate in the future.

Using global climate model simulations that replicated the ocean basins and landmasses of this period, it appears that changes in ocean circulation due to warming played a key role.

However, it is possible that long - term natural variability, rooted in changes in the ocean circulation, underlies much of this variability over multiple decades (8 — 12).

D / O events tended to be short term and usually hemispheric, typically reflecting changes in ocean circulation patterns that produced NH effects opposite those in Antarctica.

Driven by changes in ocean circulation, the rapid sea level rise will bring increased risk of damage from hurricanes and winter storm surges, researchers say.

But given the ever - increasing intensity of these impacts - and the fact that the melting of Greenland only continues to speed up - it seems likely the future will bring continued dramatic global changes in ocean circulation.

Ocean Circulation • Changes in ocean circulation also can result in short - term climate fluctuations.

Though more work is needed to fully understand these long term trends, especially what happens from the mid-1970's, it is likely that changes in ocean circulation involving some combination of the Atlantic meridional overtuning circulation and the subtropical cells are required to explain the observations.

Shall we try to discern the cause of cloud changes associated with changes in ocean circulation?

Climate scientists would say in response that changes in ocean circulation can't sustain a net change in global temperature over such a long period (ENSO for example might raise or lower global temperature on a timescale of one or two years, but over decades there would be roughly zero net change).

Changes in ocean circulation may also play a role.

Among the global - scale tipping points identified by earth scientists are the collapse of large ice sheets in Greenland and Antarctica, changes in ocean circulation, feedback processes by which warming triggers more warming, and the acidification of the ocean.h

This lack of agreement is due to the fact that their models ignore major forcings — both from variations of solar activity and from changes in ocean circulation.

Let's phrase this question as a hypothesis: Changes in ocean circulation have caused the observed surface warming of the past 50 years.

And they have been used to make a variety of predictions — including for example that with an enhanced greenhouse effect the upper stratosphere will cool while the troposphere warms, that nights will warm more rapidly than days, and more generally the Hadley Cells and dry subtropics will expand, the continental interiors dry out, storm tracks move northward, the tropopause rise, changes in ocean circulation.

These results also increase our overall understanding of glacial − interglacial cycles by putting further constraints on the timing and strength of other processes involved in these cycles, like changes in sea ice and ice sheet extents or changes in ocean circulation and deep water formation.

However, it remains a major scientific challenge to model and project the changes of the magnitude and intensity of subsurface oxygen depletion because it depends on changes in ocean circulation, rates of de-nitrification, and nutrient runoff from land, and because global data coverage for chemical and biological parameters remains poor.

explore changes in ocean circulation caused by the growth of extensive fast ice and its impact on life in Commonwealth Bay

Changes in ocean circulation are thought to be able to produce large rapid temperature changes.

By 2006 some models still found that changes in the ocean circulation «are able to produce abrupt climate changes on decadal to centennial time scales,» Randall et al. (2007), p. 641.

The seasonal climate may relate to changes in the ocean circulation pattern prior to 4.6 Ma that resulted in an increased temperature and atmospheric pressure gradient between the east coast of North America and the Atlantic Ocean, but this climate phase seems to be only a temporary condition, as underlying and overlying sediment are both consistent with drier conditions.

Here we examine the hypothesis4 that CO2 variations arose from changes in ocean circulation that affected the distribution of chemical properties and thus of P CO 2 in the surface waters of the world ocean.

However, we still lack a quantitative understanding of the physical mechanisms leading to the suggested changes in ocean circulation, which inevitably challenges our interpretation of past and present climates and shakes our confidence in future projections.

In order to reliably interpret surface temperature variations we need a good idea of all the causal factors, including El Niño, solar irradiance, volcanic eruptions, observational biases, changes in ocean circulation and possible long term oscillations.

These millennial - scale teleconnections resulted from the bipolar seesaw behaviour of the Atlantic Ocean related to changes in the ocean circulation.

The most natural type of long term variability is in my view based on slowly varying changes in ocean circulation, which doesn't necessarily involve major transfer of heat from one place to another but influences cloudiness and other large scale weather patterns and through that the net energy flux of the Earth system.

Tropics affected: Konrad A. Hughen, Jonathan T. Overpeck, Scott J. Lehman, Michaele Kashgarian, John Southon, Larry C. Peterson, Richard Alley, & Daniel M. Sigman, «Deglacial changes in ocean circulation from an extended radiocarbon calibration,» Nature 391:65 - 68 (1 January 1998).

Ongoing changes in ocean circulation patterns, which are helping to drive warm water from other parts of the sea closer to the Antarctic continent, are also believed to be a major factor.

Sensitivity experiments show that atmospheric CO2 closely follows decadal - mean temperature changes when changes in ocean circulation and ocean - sediment interactions are not important.

25: Coasts), due primarily to land subsidence, 5 although recent research suggests that changes in ocean circulation in the North Atlantic — specifically, a weakening of the Gulf Stream — may also play a role.6

«Our study supports the view that changes in ocean circulation were at least in part responsible for causing abrupt climate changes.

The scientists stress that more work is needed to determine whether changes in ocean circulation initiated the abrupt climate changes or were an intermediary effect initially triggered by something else.

That suggests that cooling may start with changes in the ocean circulation, influencing the northern sea surface and atmosphere, said co-author Jerry McManus, a professor at Lamont - Doherty Earth Observatory.

Changes in ocean circulation, which are loosely coupled to the atmospheric energy exchange, can produce substantial year - to - year variability in global temperatures (e.g., El Nino and La Nina events).

The report finds no proof to back up IPCC hysteria that blames CO2 for melting polar ice caps, rising sea levels, disastrous changes in ocean circulation, or calamitous differences in precipitation patterns and river flows.

The observed heat and salinity trends are linked to changes in ocean circulation and other manifestations of global change such as oxygen and carbon system parameters (see Section 5.4).

To test how well a climate model predicts possible changes in ocean circulation due to climate change, GISS scientists have simulated the effects of a massive flood of fresh water some 8000 years ago.

New evidence is also suggesting that changes in ocean circulation patterns played a very important role in bringing warmer seawater into the North Atlantic.

Ocean warming is occurring in concert with the acidification of ocean waters (e.g. Doney et al. 2009), as well as changes in ocean circulation (e.g. Bakun et al. 2009).

Climate models also indicate a geographical variation of sea - level rise due to non-uniform distribution of temperature and salinity and changes in ocean circulation.

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

In addition to atmospheric circulation affecting sea levels, changes in ocean circulation can also have effects.

A Google search for the passage «explore changes in ocean circulation caused by the growth of extensive fast ice» in November yields zero results:

4 Natural Processes that Change Climate Ocean Circulations Changes in ocean circulation also can result in short - term climate fluctuation EX: El Niño

Various mechanisms, involving changes in ocean circulation, changes in atmospheric concentrations of greenhouse gases or haze particles, and changes in snow and ice cover, have been invoked to explain these sudden regional and global transitions.

This leaves all other feedbacks including changes in ocean circulation, water vapour, clouds, and snow as the undetermined factors in past climate changes.

Recent evidence from ice - core drilling in Greenland indicates that similar fluctuations also occurred during the previous interglacial period, possibly due to rapid changes in ocean circulation.