Sentences with phrase «meandering jet»

Hence we get hypothesis such as the meandering jet stream playing havoc with the weather.

But the history of research on the atmospheric circulation seems to conflict with recent theory — which I assume is driven mainly by Jennifer Francis and colleagues, and which is what US science advisor Holdren is referring to when he says there is a growing body of evidence linking meandering jet stream behaviour to Arctic temperature amplification.

Everything is consistent with global warming — cold — warm — wet — dry — meandering jet streams — more ice — less ice — Australia losing at cricket to the English and rugby to the Kiwis — Kylie Minouge — etc etc..

As the renowned Dr Francis had shown (well she actually hasn't shown anything, just offered a hypothesis), that reduced gradient will result in a meandering jet stream, which will play havoc with weather and lead to an increase in «extreme» weather.

It would be nice to see if there is active Hadley cell models on the web, in the meantime observing what Hadley, Ferrel and Polar cells are doing must be done through met models, with a particular eye on the meandering jet streams...

Not exact matches

Climate change slowed the jet stream, allowing it to meander and bring cold air into typically warm states.

Exploiting this energy will not be easy, not least because of the way the jet streams meander and change location, but several groups are developing ways to do it.

That, in turn, is causing the jet stream to meander more — and making it more likely to spin off blocking events like cut - off highs.

On our planet the jet stream meanders from west to east and brings, associated with it, the system of areas of low pressure and anticyclones which we have been seeing regularly on weather maps.

The Jet Stream has become slower, with large bends that meander further south.

For example, we can see Judd's relief — a banal material, shaped and folded according to simple rules to produce a surprisingly visually engaging object — as anticipating a work like Tauba Auerbach's plywood sculpture, The New Ambidextrous Universe III (2014), which the artist created by water - jet - cutting the material according to a meandering line she drew on a tablet and distorted digitally, then arranging the resulting pieces on the ground in reverse order.

Under the second scenario (if feasible), the Arctic region is cooled to the point that the jet stream no longer meanders around in such an erratic fashion, and agriculture is less at risk.

Rossby waves in the atmosphere are easy to observe as (usually 4 - 6) large - scale meanders of the jet stream.

If the temperature differential reduces because of a warming Arctic then the jet stream weakens and, again, like a river on a flat bed, it will meander every time it comes across an obstacle.

Now to make matters even more complicated imagine this band of jet stream meandering around the northern hemisphere west to east like a cap, it doesn't move along the same latitude, but undulates... sometimes travelling northward on its eastern journey, sometimes southward, with globally four / six massive dips or troughs and four / six massive crests or peaks around the entire northern hemisphere.

Conceptually, it's hard to see how the Gulf Stream western boundary current could be weakened by conditions around Greenland; this is a fluid dynamics system, not a mechanical «belt»; a backup due to less deep water formation should have little effect on the physics of the gyre and the formation of the western boundary current, and it also seems the tropical warming and the resulting equator - to - pole heat transport are the drivers — but perhaps modulation by jet stream meandering is playing some role in the cooling?

As the Arctic warms up it slows the weather - steering jet stream, «which leads to large persistent meanders in the jet stream associated with persistent weather extremes.

HERE is a lecture by Dr. Jennifer Francis, Rutgers U. documenting the connection between the loss of Arctic ice due to global warming, slower moving jet streams with larger meandering amplitudes, and increases in extreme weather.

The more sluggish and persistent those meanders, the more persistent the patterns of regional warmth where the jet stream pulls warm air northward, and the regional cold where it pulls arctic air south.

We think that less ice may mean more extreme weather as the Jet Stream slows and meanders more widely.

Cornell and Rutgers researchers report in the March issue of Oceanography that the severe loss of summertime Arctic sea ice - attributed to greenhouse warming - appears to enhance Northern Hemisphere jet stream meandering, intensify Arctic air mass invasions toward middle latitudes, and increase the frequency of atmospheric blocking events like the one that steered Hurricane Sandy west into the densely populated New York City area.

The path of the jet stream «typically has a meandering shape, and these meanders themselves propagate east, at lower speeds than that of the actual wind within the flow.

I want to focus here, not on the dominant mid-latitude waves that are associated with the highs and lows and jet stream meanders familiar from weather maps, but the small isolated vortices that form in the tropics.

The meanders of the jet stream produce the storm tracks that are the major weather makers in the mid-latitude regions.

And like slow - moving river meandering through a desert, the diminished jet stream wobbles over the northern portions of North America, Europe and Asia.

And as for all the cold records, that's because of Arctic amplification putting the Jet Stream on a wild meandering course.

Some people do claim that Arctic Amplification has caused the Jet Stream to meander more than usual, but that is pure speculation.

Furthermore the topography of the western USA has always caused the jet stream to meander northward and then flow southward on the eastern side of the Rocky Mountains.

There are two typical winter storm systems that occur centered around Colorado and Alberta Canada because the Rockies create that jet stream meander which causes upper level divergence and enhanced cyclonic activity.

The big weather systems that affect us middle - latitude dwellers are usually associated with those meanders in the jet.

Weaker magnetic activity on the Sun means less ozone which means a weaker jet stream which means it meanders more, bringing cold air south in some places.

When the jet stream is strong it flows well and that doesn't happen, but when it's weak it can meander, flopping north and south in various locations.

The cause of last month's strange weather was an extraordinarily large and persistent meander of the jet stream that swept tropical air, with temperatures reaching into the 80s as far north as southern Canada.

This causes the jet stream to meander, weakening the vortex, moving cold air south and warm air north.»

PIK alarm story fails the test of science: Jet Stream will also meander as usual in the future By Dr. Sebastian Lüning and Prof. Fritz Vahrenholt (German text translated by P Gosselin) Almost one year ago the Potsdam PIK Institute put out a press release, which warned of stalling Jet Stream waves.

The meanders of the jet stream produce the storm tracks that are the major weather makers in the midlatitude regions.

If the planet warms the jet should be to the North of its usual meandering paths.

Enhanced warming of the Arctic affects the jet stream by slowing its west - to - east winds and by promoting larger north - south meanders in the flow.

In a new study published in the Journal of Climate, the Community Earth System Model Large Ensemble (CESM - LENS) of simulations is used to explore how various characteristics of the mid-latitude atmospheric circulation (zonal flow, synoptic blockings, jet stream meanders) evolve along the course of the 21st century under the RCP8.5 scenario of anthropogenic emissions.

Earlier this year, climate scientist Marco Tedesco of Columbia University published data supporting an earlier proposal that the retreat of Arctic sea ice has disrupted the polar jet stream, causing weather systems to meander more slowly from west to east.