Sentences with phrase «shift of warm ocean»

Not exact matches

The rapid northerly shifts in spawning may offer a preview of future conditions if ocean warming continues, according to the new study published in Global Change Biology by scientists from the Pacific States Marine Fisheries Commission, Oregon State University and NOAA Fisheries» Northwest Fisheries Science Center.

«When we included projected Antarctic wind shifts in a detailed global ocean model, we found water up to 4 °C warmer than current temperatures rose up to meet the base of the Antarctic ice shelves,» said lead author Dr Paul Spence from the ARC Centre of Excellence for Climate System Science (ARCCSS).

As the oceans grow warmer and more acidic from our emissions of carbon dioxide, we may once again shift the microbial balance in the ocean.

For example, the Gulf of Mexico has an east - west coastline that prevents a northerly or poleward shift of species in response to warming ocean waters,.

This shift strengthens the ocean currents that bring warm, salty water to the surface, where it accelerates the melting of Antarctic ice.

El Niño — a warming of tropical Pacific Ocean waters that changes weather patterns across the globe — causes forests to dry out as rainfall patterns shift, and the occasional unusually strong «super» El Niños, like the current one, have a bigger effect on CO2 levels in the atmosphere.

The researchers reported that the shifting winds «produce an intense warming» just below the surface of the ocean.

Naturally occurring interannual and multidecadal shifts in regional ocean regimes such as the Pacific El Niño - Southern Oscillation, the North Atlantic Oscillation, and the Atlantic Multidecadal Oscillation, for example, are bimodal oscillations that cycle between phases of warmer and cooler sea surface temperatures.

El Niño is most widely known for how it shifts the location of warm ocean waters, leading to cooler - than - normal waters in the western tropical Pacific but warmer - than - normal in the central and eastern parts of the basin.

Researchers found that due to warming waters, the edge of the sharks» range could shift as much as 40 miles poleward per decade, pushing the sharks away from the warming oceans near the equator into different habitats.

Meanwhile, increasing temperature and ocean warming may lead to the reduction of diatom production as well as cell size, inducing poleward shifts in the biogeographic distribution of diatoms.

«Warming and ocean acidification don't happen overnight and it may be that some of the ecosystem shifts they facilitate will take years to become visually apparent,» Simon Freeman, a postdoctoral fellow with the American Society of Engineering Education who has also done a series of underwater recordings, said.

Given how much yelling takes place on the Internet, talk radio, and elsewhere over short - term cool and hot spells in relation to global warming, I wanted to find out whether anyone had generated a decent decades - long graph of global temperature trends accounting for, and erasing, the short - term up - and - down flickers from the cyclical shift in the tropical Pacific Ocean known as the El Niño — Southern Oscillation, or ENSO, cycle.

Other factors would include: — albedo shifts (both from ice > water, and from increased biological activity, and from edge melt revealing more land, and from more old dust coming to the surface...); — direct effect of CO2 on ice (the former weakens the latter); — increasing, and increasingly warm, rain fall on ice; — «stuck» weather systems bringing more and more warm tropical air ever further toward the poles; — melting of sea ice shelf increasing mobility of glaciers; — sea water getting under parts of the ice sheets where the base is below sea level; — melt water lubricating the ice sheet base; — changes in ocean currents -LRB-?)

Given the number of ways that things can go wrong with continued CO2 emissions (from ocean acidfication and sea level rise to simple warming, shifting precipitation patterns, release of buried carbon in perma - frost, and the possibility of higher climate sensitivities — which seem to be needed to account for glacial / inter-glacial transitions), crossing our fingers and carrying on with BAU seems nothing short of crazy to me.

Well, for one thing, it's very difficult to understand how a warming process dependent on airborne greenhouse gases could suddenly, over a period of a year or two, shift heat from the atmosphere to the oceans.

The other factor of course is the extent to which wine growing in England in the so - called MWP was an indication of a warmer Earth during this period or a small shift in the temperature distribution of the Earth due to ocean circulation patterns and suchlike.

Given all the independent lines of evidence pointing to average surface warming over the last few decades (satellite measurements, ocean temperatures, sea - level rise, retreating glaciers, phenological changes, shifts in the ranges of temperature - sensitive species), it is highly implausible that it would lead to more than very minor refinements to the current overall picture.

I asked Lee and McPhaden how a connection to greenhouse - driven warming could be made, given the possibility that the Pacific shift could be the result of long - term oscillations in conditions in the ocean unrelated to the buildup of heat - trapping greenhouse gases in the air.

There is so little understanding about how the ocean parses its response to forcings by 1) suppressing (local convective scale) deep water formation where excessive warming patterns are changed, 2) enhancing (local convective scale) deep water formation where the changed excessive warming patterns are co-located with increased evaporation and increased salinity, and 3) shifting favored deep water formation locations as a result of a) shifted patterns of enhanced warming, b) shifted patterns of enhanced salinity and c) shifted patterns of circulation which transport these enhanced ocean features to critically altered destinations.

There was an interesting study in Nature Geoscience last Sunday showing pretty clearly that the accelerating flow of the Jacobshavn glacier in recent years was most likely driven by an influx of warm deep seawater, and that shift was likely due to changes in pressure and wind patterns over the North Atlantic Ocean.

Despite faster rates of warming in terrestrial systems compared to ocean environments, the velocity of range shifts for marine taxa exceeds those reported for terrestrial species.

The team's findings, published in Nature journal Scientific Reports, confirmed the connection in past climate warming, the Pacific Ocean's temperature shifts and long episodes of drought in California.

El Niños like this one have the ability to shift weather patterns on a global basis and in general send a surge of extra heat into the atmosphere from the warmer - than - normal tropical Pacific Ocean.

Other aspects of global warming's broad footprint on the world's ecosystems include changes in the abundance of more than 80 percent of the thousands of species included in population studies; major poleward shifts in living ranges as warm regions become hot, and cold regions become warmer; major increases (in the south) and decreases (in the north) of the abundance of plankton, which forms the critical base of the ocean's food chain; the transformation of previously innocuous insect species like the Aspen leaf miner into pests that have damaged millions of acres of forest; and an increase in the range and abundance of human pathogens like the cholera - causing bacteria Vibrio, the mosquito - borne dengue virus, and the ticks that carry Lyme disease - causing bacteria.

Yes, the simple term «global warming» doesn't convey all the complexities of what can happen as that warming causes air and ocean currents to shift, but climate change / disruption provides even less information.

We have had lengthy heating phase caused by a spurt of insolation, now we have had a big El Nino, a subsequent shift to La Nina and the resulting warm currents moving up the the Western Pacific, causing warming polar oceans and changes in atmospheric water vapor content.

In the Arctic, the tipping points identified in the new report, published on Friday, include: growth in vegetation on tundra, which replaces reflective snow and ice with darker vegetation, thus absorbing more heat; higher releases of methane, a potent greenhouse gas, from the tundra as it warms; shifts in snow distribution that warm the ocean, resulting in altered climate patterns as far away as Asia, where the monsoon could be effected; and the collapse of some key Arctic fisheries, with knock - on effects on ocean ecosystems around the globe.»

«New scientific evidence that the world's oceans... warmed significantly... ocean energy is the primary cause of extreme climate events... increasing the number of insurance - relevant hazards... a near irreversible shift... even if greenhouse gas emissions stopped, ocean temperatures would keep rising.»

DK12 used ocean heat content (OHC) data for the upper 700 meters of oceans to draw three main conclusions: 1) that the rate of OHC increase has slowed in recent years (the very short timeframe of 2002 to 2008), 2) that this is evidence for periods of «climate shifts», and 3) that the recent OHC data indicate that the net climate feedback is negative, which would mean that climate sensitivity (the total amount of global warming in response to a doubling of atmospheric CO2 levels, including feedbacks) is low.

In his recently published study in the journal Nature, Temperatures blown off course, he explains how unprecedented trade winds have shifted heat into the ocean thermocline - between 100 metres and 300 metres - and that this is the primary cause of the global warming pause.

On the other hand, the actual LOD shifts could cause enough of a perturbation to the ocean's circulating patterns to produce warming responses.

Previous large natural oscillations are important to examine: however, 1) our data isn't as good with regards to external forcings or to historical temperatures, making attribution more difficult, 2) to the extent that we have solar and volcanic data, and paleoclimate temperature records, they are indeed fairly consistent with each other within their respective uncertainties, and 3) most mechanisms of internal variability would have different fingerprints: eg, shifting of warmth from the oceans to the atmosphere (but we see warming in both), or simultaneous warming of the troposphere and stratosphere, or shifts in global temperature associated with major ocean current shifts which for the most part haven't been seen.

El Niño is the name assigned when shifting trade winds over the Pacific Ocean give rise to warmer water temperatures further east, fomenting stormy conditions in parts of the Americas and concomitant droughts in parts of Asia and Australia.

The surface of the oceans are always warmer than the depths of the oceans > If you change the mixing efficiency, by shifting atmospheric circulations with solar precessional cycle for example, the mixing efficiency changes and the regions where precipitation falls changes.

Parts of North America and Europe may cool naturally over the next decade, as shifting ocean currents temporarily blunt the global - warming effect caused by mankind, Germany's Leibniz Institute of Marine Sciences said.

Previous research has shown that global warming will cause changes in ocean temperatures, sea ice extent, salinity, and oxygen levels, among other impacts, that are likely to lead to significant shifts in the distribution range and productivity of marine species, the study notes.

Previous research has shown that global warming will cause changes in ocean temperatures, sea ice extent, salinity, and oxygen levels, among other impacts, that are likely to lead to shifts in the range and productivity of marine species.

«The authors write that «the El Niño - Southern Oscillation (ENSO) is a naturally occurring fluctuation,» whereby «on a timescale of two to seven years, the eastern equatorial Pacific climate varies between anomalously cold (La Niña) and warm (El Niño) conditions,» and that «these swings in temperature are accompanied by changes in the structure of the subsurface ocean, variability in the strength of the equatorial easterly trade winds, shifts in the position of atmospheric convection, and global teleconnection patterns associated with these changes that lead to variations in rainfall and weather patterns in many parts of the world,» which end up affecting «ecosystems, agriculture, freshwater supplies, hurricanes and other severe weather events worldwide.»»

By examining the spatial pattern of both types of climate variation, the scientists found that the anthropogenic global warming signal was relatively spatially uniform over the tropical oceans and thus would not have a large effect on the atmospheric circulation, whereas the PDO shift in the 1990s consisted of warming in the tropical west Pacific and cooling in the subtropical and east tropical Pacific, which would enhance the existing sea surface temperature difference and thus intensify the circulation.

51 Fig. 20 - 14, p. 481 Cut fossil fuel use (especially coal) Shift from coal to natural gas Improve energy efficiency Shift to renewable energy resources Transfer energy efficiency and renewable energy technologies to developing countries Reduce deforestation Use more sustainable agriculture and forestry Limit urban sprawl Reduce poverty Slow population growth Remove CO 2 from smoke stack and vehicle emissions Store (sequester) CO2 by planting trees Sequester CO 2 deep underground Sequester CO 2 in soil by using no - till cultivation and taking cropland out of production Sequester CO 2 in the deep ocean Repair leaky natural gas pipelines and facilities Use animal feeds that reduce CH 4 emissions by belching cows Solutions Global Warming PreventionCleanup

Shifting large volumes of air towards the poles increases radiation of energy to space thus neutralising any warming of the air and shifting large volumes of air towards the equator draws heat from sunshine and oceans thus neutralising any cooling of Shifting large volumes of air towards the poles increases radiation of energy to space thus neutralising any warming of the air and shifting large volumes of air towards the equator draws heat from sunshine and oceans thus neutralising any cooling of shifting large volumes of air towards the equator draws heat from sunshine and oceans thus neutralising any cooling of the air.

He and colleagues recently tried to calculate the possible dates at which local climates could shift inexorably in different parts of the world, and tried also to build a picture of how ocean warming and acidification would affect incomes everywhere.

The unusually high sea ice surface temperatures reflect a shift in ocean circulation, enhancing the import of warm, Atlantic - derived waters into the Arctic Oocean circulation, enhancing the import of warm, Atlantic - derived waters into the Arctic OceanOcean.

In 1976/77 the surface temperature of a vast area of the Pacific Ocean abruptly warmed by several degrees as the Pacific Decadal Oscillation shifted from «cool phase» to «warm phase».

Posted in Development and Climate Change, Global Warming, Research Comments Off on Previous Climatic Shifts Deprived Oceans of Oxygen

The pre-Holocene climate shifts seem to be well accounted for by dynamics of glacial meltoff, freshwater discharge, and the impact on the ocean circulation... all of which is less of an issue in an initially warm climate, and the AR5 generation models give no indication that the overturning circulation will be significantly impacted over the coming century.

If some of the ocean heat uptake during the last 20 years has shifted from the shallow and warm parts to the deeper and colder parts this would reduce the total thermal expansion even if the total heat flux into the oceans remained the same.

In 2009, they continue to examine the coupling of ocean cycles, stressing «caution that the shifts described here are presumably superimposed upon a long term warming trend due to anthropogenic forcing» (Swanson & Tsonis 2009).

The Senate resolution recognized that global warming could shift fish stocks toward the central Arctic Ocean, and that dwindling sea ice would open the door to exploitation of the region.