Sentences with phrase «atlantic ocean circulation changes»

Explaining these previous hiatus periods in context of Atlantic Ocean circulation changes makes much more sense to me than the aerosol forcing argument.

Not exact matches

«The Atlantic Ocean surface circulation, and however that changes, has implications for how the rainfall changes on continents.»

«The study demonstrates a robust century - scale link between ocean circulation changes in the Atlantic basin and rainfall in the adjacent continents during the past 4,000 years,» said UTIG Director Terry Quinn, a co-author on the study.

Looking at shifts in Manley's winter temperatures from year to year, he says, gives a good reading of important natural cycles that influence climate, such as changes in ocean circulation like the North Atlantic Oscillation.

These large Northern Hemisphere cooling events have previously been linked to a change in the Atlantic Ocean circulation that led to a reduced transport of warm water to the high latitudes in the North.

But within these long periods there have been abrupt climate changes, sometimes happening in the space of just a few decades, with variations of up to 10ºC in the average temperature in the polar regions caused by changes in the Atlantic ocean circulation.

Retreating sea ice in the Iceland and Greenland Seas may be changing the circulation of warm and cold water in the Atlantic Ocean, and could ultimately impact the climate in Europe, says a new study by an atmospheric physicist from the University of Toronto Mississauga (UTM) and his colleagues in Great Britain, Norway and the United States.

«Northwest Atlantic Ocean may get warmer, sooner: High resolution global climate model shows much faster warming and changing ocean circulation.&rOcean may get warmer, sooner: High resolution global climate model shows much faster warming and changing ocean circulation.&rocean circulation.»

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.

He believes that changes in ocean circulation have warmed the Atlantic and increased hurricane activity in the past decade and that this is simply the result of normal oscillation in natural climate cycles.

They will look for evidence of temperature changes caused by ocean circulation patterns in both the North Atlantic and tropical Pacific Oceans, which drive precipitation in Tibet as well as the Indian monsoons.

«This implies that a very rapid transmission process must have operated, that linked rapid climate change around Greenland with the otherwise sluggish deep Atlantic Ocean circulation,» said Gottschalk.

...» Meltwater from glacial Lake Agassiz (southwest of Hudson Bay) draining catastrophically into the North Atlantic via Lake Superior and the St. Laurence seaway was once thought to have initiated ocean circulation changes leading to the Younger Dryas cold period.

Climate change is playing a major role in the slowing down of the circulation of the Atlantic Ocean.

Millennial - scale glacial variability versus Holocene stability: Changes in planktic and benthic foraminifera faunas and ocean circulation in the North Atlantic during the last 60,000 years.

The 8.2 kyr event qualifies as an abrupt change by almost any definition (except that adopted by the NRC panel on the subject curiously) and was most likely tied to the catastrophic final draining of paleo - lake Agassiz and subsequent changes in the North Atlantic ocean circulation (see a summary of some of our recent research on the topic).

A number of recent studies linking changes in the North Atlantic ocean circulation to sea ice extent led Yeager to think that it would also be possible to make decadal predictions for Arctic winter sea ice cover using the NCAR - based Community Earth System Model...

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.

James Hansen, PhD, concludes that with further warming, which experts acknowledge is inevitable, changes in North Atlantic Ocean circulation could result in «superstorms» unlike any in human history.

Hoerling and Kumar (2003) attributed the drought to changes in atmospheric circulation associated with warming of the western tropical Pacific and Indian oceans, while McCabe et al. (2004) have produced evidence suggesting that the confluence of both Pacific decadal and Atlantic multi-decadal fluctuations is involved.

«Modern data on ocean circulation changes in AMOC - Atlantic Meridional Overturning Circulation, and SMOC - Southern MOC arcirculation changes in AMOC - Atlantic Meridional Overturning Circulation, and SMOC - Southern MOC arCirculation, and SMOC - Southern MOC are examined.

This correction changes the overall salt budget for the Atlantic, also changing the stability of the model's ocean circulation in future climate change.

eg «These studies provide new insights on the sensitivity and response of meridional ocean circulation to melt water inputs to the North Atlantic high latitudes (e.g., Bamberg et al., 2010; Irvali et al., 2012; Morley et al., 2011) and their potential role in amplifying small radiative variations into large a climate response through dynamic changes in ocean - atmosphere interactions (e.g., Morely et al., 2011; Irvali et al., 2012; Morley et al., 2014).

A recent paper by Vecchi and Soden (preprint) published in the journal Geophysical Research Letters has been widely touted in the news (and some egregiously bad editorials), and the blogosphere as suggesting that increased vertical wind shear associated with tropical circulation changes may offset any tendencies for increased hurricane activity in the tropical Atlantic due to warming oceans.

It will take some time to integrate the findings of this study with other evidence of changes in North Atlantic ocean circulation, including the changes seen in salinity, changes in the so - called Atlantic Multidecadal Oscillation (AMO)(see e.g. Knight et al, 2005 and references therein) and other indicators of Atlantic climate change (e.g. Dickson et al, 2002).

Some of these changes have a regularity within broad limits and the planet responds with a broad regularity in changes of ice, cloud, Atlantic thermohaline circulation and ocean and atmospheric circulation.

He concluded that the latter is caused by changes in the North Atlantic ocean circulation, also called the Gulf Stream System.

The 8.2 kyr event qualifies as an abrupt change by almost any definition (except that adopted by the NRC panel on the subject curiously) and was most likely tied to the catastrophic final draining of paleo - lake Agassiz and subsequent changes in the North Atlantic ocean circulation (see a summary of some of our recent research on the topic).

There are continuing major questions about the future of the great ice sheets of Greenland and West Antarctica; the thawing of vast deposits of frozen methane; changes in the circulation patterns of the North Atlantic; the potential for runaway warming; and the impacts of ocean carbonization and acidification.

The jet stream off the East Coast of the United States controls an important climate pattern in the Atlantic... «The North Atlantic Oscillation is really driving these changes in ocean circulation,» said Gerald McCarthy, lead study author and an oceanographer at the University of Southampton in the United Kingdom....

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.

-- Ocean warming and circulation changes will reduce the rate of carbon uptake in the Southern Ocean and North Atlantic.

The Atlantic Ocean circulation that carries warmth into the Northern Hemisphere's high latitudes is slowing down because of climate change - and is at its weakest point in the past 1,600 years.

Strong evidence from ocean sediment data and from modelling links abrupt climate changes during the last glacial period and glacial - interglacial transition to changes in the Atlantic Ocean circulaocean sediment data and from modelling links abrupt climate changes during the last glacial period and glacial - interglacial transition to changes in the Atlantic Ocean circulaOcean circulation.

Some of these control variables have a regularity within broad limits and the planet responds over decades to millennia with a broad regularity in changes of ice, cloud, Atlantic thermohaline circulation and ocean and atmospheric circulation.

The changing phases of Atlantic hurricane activity are not completely understood; but there appears to be a link to fluctuations in the thermohaline circulation, the global pattern of ocean currents which in western Europe appears as the Gulf Stream.

In a recent technical comment, Zhang et al. show that ocean dynamics play a central role in the Atlantic Multidecadal Oscillation (AMO), and the previous claims that «the AMO is a thermodynamic response of the ocean mixed layer to stochastic atmospheric forcing, and ocean circulation changes have no role in causing the AMO» are not justified.

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

«The authors write that «the notorious tropical bias problem in climate simulations of global coupled general circulation models manifests itself particularly strongly in the tropical Atlantic,»... they state that «the climate bias problem is still so severe that one of the most basic features of the equatorial Atlantic Ocean — the eastward shoaling thermocline — can not be reproduced by most of the IPCC assessment report models,... as they describe it, «show that the bias in the eastern equatorial Atlantic has a major effect on sea - surface temperature (SST) response to a rapid change in the Atlantic Meridional Overturning Circulation (AMcirculation models manifests itself particularly strongly in the tropical Atlantic,»... they state that «the climate bias problem is still so severe that one of the most basic features of the equatorial Atlantic Ocean — the eastward shoaling thermocline — can not be reproduced by most of the IPCC assessment report models,... as they describe it, «show that the bias in the eastern equatorial Atlantic has a major effect on sea - surface temperature (SST) response to a rapid change in the Atlantic Meridional Overturning Circulation (AMCirculation (AMOC).»

The impact of changes in the ocean overturning circulation on climate has become a hot topic today as global temperatures rise and melting sea ice and glaciers add freshwater to the North Atlantic.

Evidence from the Pacific and the Atlantic suggests that nutrient supply to the upper productive layer of the ocean is declining due to reductions in the Meridional Overturning Circulation and upwelling (McPhaden and Zhang, 2002; Curry and Mauritzen, 2005) and changes in the deposition of wind - borne nutrients.

This basin - wide change in the Atlantic climate (both warming and cooling) induces a basin - scale sea surface temperature seesaw with the Pacific Ocean, which in turn modifies the position of the Walker circulation (the language by which the tropical basins communicate) and the strength of the Pacific trade winds.

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

Slow variations in upper ocean heat content that have been observed in the subpolar and marginal ice zone regions of the Atlantic since the mid-twentieth century are thought to be related to changes in the strength of the Atlantic Meridional Overturning Circulation (AMOC).

«Feb. 25, 2008 — Predictions that the 21st century is safe from major circulation changes in the North Atlantic Ocean may not be as comforting as they seem, according to a Penn State researcher.»

Salinity changes at subpolar North Atlantic are known to affect deep - water formation to initiate such an ocean circulation shift.

Changes in Atlantic Ocean circulation historically meant roughly 30 warmer years followed by 30 cooler years.

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

Salinity changes at subpolar North Atlantic are known to affect deep - water formation to initiate such an ocean circulation shift (25).

Oceanographers also had reasons to believe that the pattern of North Atlantic Ocean circulation could change on a short timescale.