Sentences with phrase «hemisphere jet stream»

During the ice age, due to the large polar cooling, the northern hemisphere jet stream extended more southwards.

She sees the rapid warming of the Arctic weakening the northern hemisphere jet stream, and thus, once again, slowing down the weather, leaving a given pattern stuck in place for longer (making any event potentially more disruptive and extreme).

The primary cause of changes in the course of the northern hemisphere jet stream ultimately goes back to sea surface temperatures in the West Pacific.

Air from the Pacific is picked up and transported by the northern hemisphere jet stream — a fast flowing, narrow air current in the upper atmosphere.

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.

And science is emerging suggesting a link between the melting of Arctic sea ice on one hand and faster warming in the region and changes to the northern hemisphere jet stream on the other, explaining why some weather systems appear to get «stuck in place» — to often - devastating effect.

[Response: The NAO is really just a measure of the dominant mode of variability of the Northern Hemisphere jet stream over the North Atlantic and neighboring regions.

Hello, as an amateur observer (having difficulty to read the technical part of this article) I wonder if we are seeing the southern hemisphere jet streams spread out over a far wider area than before and particularly in Northerly direction (up to about 10 degrees South especially over the Pacific and Atlantic).

There has been a poleward shift and intensification of the mid-latitude depressions in the North Atlantic from the 1950s to the early 2000s, which is linked to a poleward shift in Northern Hemisphere jet streams.

Not exact matches

The important stream was stationary for 10 days, and it was high in the hemisphere, stalling heat from the South.The stream has moved lower, and is allowing cooler air from Canada and the north to move into the states.But nobody on the tube really explains the behavior of the jet stream and how it is linked to climate change.It would be good if that attractive ABC meterologist Ginger Lee would explain it to us.

The arrow on the upper right edge of the image points to a particularly strong jet stream churning through Saturn's northern hemisphere.

Lupo and Andrew Jensen, who earned his doctorate at MU, used an existing climate model to simulate jet stream flow in the Northern Hemisphere.

«We estimate that the jet streams in both hemispheres have shifted poleward by roughly 1 degree latitude in both summer and winter seasons,» the researchers, led by Qiang Fu of the University of Washington, write in today's Science.

The jet stream — a powerful river of wind high in the atmosphere — shapes the Northern Hemisphere's weather, including bitter cold snaps.

And those changes in the Hadley Circulation can affect the subtropical jet stream — an area of fast - moving air that guides storms — in both the Northern and Southern hemispheres.

«Melting ice in Greenland causes ocean levels to rise and decreasing Arctic sea ice results in odd jet stream behavior and weird weather in the Northern Hemisphere,» Stofan said.»

The temperature differential between the cold of the far North and the warmer air of the temperate zones to the south fuel the jet stream, which steers weather patterns in the Northern Hemisphere.

Here, a strong jet stream moves across Saturn's northern hemisphere.

This may have deflected the position of the jet stream, bringing colder conditions to North America than the rest of the Northern Hemisphere.

For instance, changes in ocean convection over the north Atlantic would affect the jet stream, which would have a dramatic effect upon regional precipitation, probably leading to acute drought in the northern hemisphere, which will weaken and push the northern jet stream toward the Arctic.

It is almost certain that the strange extreme weather patterns now observed throughout the northern hemisphere are related to this arctic warming and the consequent weakening of the jet streams that lie between the arctic and the more temperate northern lands.

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.

And it may also be affecting the jet stream, making weather more extreme across the Northern Hemisphere.

Stronger mid-latitude westerly wind maxima have occurred in both hemispheres in most seasons from at least 1979 to the late 1990s, and poleward displacements of corresponding Atlantic and southern polar front jet streams have been documented.

To keep a wave propagating in a lossy medium requires a continuous application of energy to sustain the oscillation, The most likely source of energy in both N and S hemispheres are the jet streams,

Evidence for a wavier jet stream in response to rapid Arctic warming New metrics and evidence are presented that support a linkage between rapid Arctic warming, relative to Northern hemisphere mid-latitudes, and more frequent high - amplitude (wavy) jet - stream configurations that favor persistent weather patterns.

«From 1979 to 2001, the Northern Hemisphere's jet stream moved northward on average at a rate of about 1.25 miles a year, according to the paper published Friday in the journal Geophysical Research Letters.

As a result of the warming Arctic, the jet streams become wavier and slower, causing freakish weather all across the Northern Hemisphere.

Another way looks at whether these wavy jet stream patterns are occurring more frequently across the northern hemisphere.

Earth, with its particular size and temperature gradients has 1 1/2 jet streams in each hemisphere in the wintertime, and much of the chaos of winter weather involves the jet streams shifting from a one - jet configuration locally to a two - jet configuration locally.

Jupiter, a large planet, has many jet streams in each hemisphere, and the number of jet streams is fairly stable.

The second feature is a very strong river of air, known as the jet stream, that flows from west to east in the middle latitudes of each hemisphere.

If you were to inject SO2 into the Northern Hemisphere, the models show, you would reduce storm activity in the North Atlantic — probably because the injection would put the tropical jet stream on a collision course with the Atlantic hurricane main development region.

A particularly strong jet stream churns through Saturn's northern hemisphere in this false - color view from NASA's Cassini spacecraft.

This figure examines a particularly strong jet stream and the eddies that drive it through the atmosphere of Saturn's northern hemisphere.

Position and intensity of the jet stream is dominant factor of the N. Hemisphere, which in turn historically is the main contributor to the global temperature data.

In an article on September 12, I reported on a 2012 paper by Jennifer Francis of Rutgers University and Stephen Vavrus of the University of Wisconsin, which showed that the loss of Arctic summer sea ice cover is adding enough heat to the ocean and atmosphere that it is helping to redirect the jet stream — the fast - moving high - altitude river of air that steers storm systems across the northern hemisphere.

Put simply, the jet stream in the northern hemisphere delivers storms across the United States.

Jennifer Francis, a researcher at Rutgers University and the most prominent proponent of the hypothesis that Arctic warming is altering the jet stream around the Northern Hemisphere, told Climate Central that while the cold snap is brief in duration, it fits with patterns observed this year and in other recent years.

Wikipedia has «Since 2007, and particularly in 2012 and early 2013, the jet stream has been at an abnormally low latitude across the UK, lying closer to the English Channel, around 50 ° N rather than its more usual north of Scotland latitude of around 60 ° N. However, between 1979 and 2001, it has been found that the average position of the jet stream has been moving northward at a rate of 2.01 kilometres (1.25 mi) per year across the Northern Hemisphere.

The case for a connection between Arctic warming and summertime extreme weather events rests on the Arctic's crucial role as a pacesetter and shapemaker of the jet stream, the powerful ribbon of upper level winds that steer weather systems from west to east across the Northern Hemisphere.

The current cooling phase has been accompanied by an increase in size of the poleward high pressure systems and a sinking equatorward of the jet streams in both hemispheres.

That was the first really clear example of the stalled jet stream effects we're seeing cause havoc in the North Hemisphere.

The snow that falls around the Arctic does cause the jet stream to move more south and that does cause snow to fall more south, on the heads of glaciers and ice packs around the northern hemisphere.

We found that relative to the global - mean trends of the respective layers, both hemispheres have experienced enhanced tropospheric warming and stratospheric cooling in the 15 to 45 ° latitude belt, which is a pattern indicative of a widening of the tropical circulation and a poleward shift of the tropospheric jet streams and their associated subtropical dry zones.

The difference in temperature between the Arctic and areas to the south is what drives the jet stream, a fast - moving river of air that encircles the northern hemisphere.

In an email conversation with Mashable, the study's lead author says that since 2000, observed changes in the jet stream have increasingly led to «a synchronization of extremes around the hemisphere.»